
Dr James Hambleton
Conjoint Senior Lecturer
School of Engineering (Civil Engineering)
- Email:james.hambleton@newcastle.edu.au
- Phone:(02) 4921 5893
Hitting the ground running
Giving roughly equal weight to experimental and theoretical aspects of geomechanics, Dr Jim Hambleton is digging deep to amplify knowledge about the natural world.
Dr Jim Hambleton is a self-described "dirt man." Sunnily asserting his intrigue and the importance of some of our planet's most mundane materials – earth and stone - the early career researcher boasts it's a challenging but "very fascinating" professional setting he finds himself in.
"I started out wanting to be a structural engineer because working with major buildings sounded really cool," he laughs.
"By the end of my undergraduate degree, however, I was convinced geomechanics was the way to go."
"Soil and rocks are much more puzzling."
"We still don't know how they behave – composites like steel and concrete are created by us to act a certain way."
Faithful to these origins, Jim studies elements of both natural and manmade environments. Whether the application is construction or mining, tribology, or even terrestrial exploration, the North American native avows it's essential to understand our effects as geomorphic agents.
"It turns out, probably unsurprisingly, that human beings move an enormous amount of earth each year," he explains.
"We continue to do so without really acknowledging or grasping what it is we're actually doing."
"Fully understanding these processes poses a tremendous challenge, particularly when you consider the confluence of potentially three-dimensional deformation, contact interaction, material instabilities and rate effects."
Best known for his expertise in computational plasticity, Jim is also well versed in modelling problems in geo and solid mechanics.
"When you put bridges and roads on the Earth you need to know how much they will penetrate under loading, even under their own self weight, and how much they are going to settle over time," he clarifies.
"More dramatically, you have to make sure that they're not going to fail, which we see quite often unfortunately with landslides, tunnel collapses and sink holes."
Tackling grit with grit
Jim's experience in dealing with these complications can be traced back to his PhD thesis. An ambitious postgraduate student at the University of Minnesota in the United States, he looked to examine soil-wheel interactions between 2007 and 2010.
"There are all kinds of reasons why you would be interested in this," the International Association of Computational Mechanics member suggests.
"It encompasses mobility difficulties, for example, whether they are off-road machinery here on Earth or rovers on Martian landscapes."
"Getting unstuck is a really tricky problem!"
"My doctoral work has ramifications for several environmental issues too – the destruction of vegetation, changes in runoff, and erosion all start with wheels damaging the soil."
Seeking to put science behind some "very empirical" data, Jim set about developing rigorous modelling framework for this specialist research area. Morphing into "something quite fundamental," the impressive innovator's three-year probe duly served to document the process by which plastic deformation is induced in different terrains.
"It produced a handful of offshoots," he recalls.
"I conducted subsequent studies on wheels themselves, for example."
Down to earth
Jim relocated to Australia after receiving his PhD, signing on to become a postdoctoral research associate with the University of Newcastle's Centre for Geotechnical and Materials Modelling. Teaming up with academics from the University of Western Australia and University of Wollongong a year later, the passionate scholar switched over to the Australian Research Council's Centre of Excellence for Geotechnical Science and Engineering.
"It was an absolute blessing," he states.
"It's brought together a really wonderful, smart group of people."
Continuing to collaborate with some of the field's boldest and brightest, Jim is currently investigating the mechanics of installation for screw piles and screw-type devices.
"The former are deep foundations that consist of one or more helical plates mounted to a central shaft," he comments.
"They're installed by twisting the pile into the ground under an applied torque or axial force."
"The latter, on the other hand, are encountered in a large number of applications, ranging from the fasteners used in building construction to the biomedical screws used to secure bone and other tissue."
With "relatively few attempts" made to model these processes theoretically, Jim is looking to champion multidisciplinary research about the fundamentals of ground anchoring systems.
"We're in a period of infancy in terms of understanding how they actually work," he admits.
"They're easy to install, but, depending on the load combination, can under-rotate, neutrally rotate, or over-rotate, which in turn affects the amount of soil disturbance."
Dusting off some solutions
When asked about his long-term aspirations, Jim is quick to reply.
"In figuring out how soils and rocks fail under loading, a big issue is understanding the basic parameters that govern deformability and strength," he says.
"How can you measure those things effectively and speedily?"
Taking samples and "squeezing and manipulating" them in laboratory settings, Jim is eager to answer just that.
"These tests are not without their limitations though," he affirms.
"It might be better to carry out measurements in situ with a probing instrument or two."
"The science will be getting an index of actual material properties."
"Geotechnical engineers can then tell what to expect when you build infrastructure on, or in, naturally occurring deposits of soil and rock."
Hitting the ground running
Giving roughly equal weight to experimental and theoretical aspects of geomechanics, Dr Jim Hambleton is digging deep to amplify knowledge about the natural w
Career Summary
Biography
I am an Early Career Researcher, having received my PhD in Civil Engineering in June 2010 from the University of Minnesota. My involvement in research started at an early age with an appointment as an Undergraduate Research Assistant in the Department of Mechanical Engineering at the University of Minnesota. In 2005, I completed an internship at Barr Engineering Company in Minneapolis. Since completing my postgraduate studies, I have been employed continuously in a position at the University of Newcastle. I first joined the Priority Research Centre for Geo technical and Materials Modelling in July 2010 as a Research Associate (Level B) and then became a Research Academic (Level C) within the ARC Centre of Excellence for Geo technical Science and Engineering (www.cgse.edu.au) at its inception.
Please visit my personal website (www.jimhambleton.com) for more on my background and interests.
Research ExpertiseMy general areas of interest are in computational plasticity, contact mechanics, geo technical analysis, and analysis of problems involving steady, pseudo-steady, and unsteady plastic flow. My expertise is in modelling problems in geo- and solid mechanics that are characterized by continuous failure and displacement of material via contact with a rigid or flexible object. Specific areas of interest include (1) ploughing and cutting of soils in earth moving operations, (2) installation effects for screw anchors and screw foundations, (3) penetration-based testing for in situ characterization of soil strength and deformability, and (4) soil-wheel interaction for off-road vehicles.
Teaching Expertise
I thoroughly enjoy teaching introductory and advanced courses in geo mechanics, solid mechanics, and numerical methods. I am particularly well-positioned to teach courses in the following subjects, which align directly with my research interests: Undergraduate Level • Statics and Dynamics • Deformable Body Mechanics • Soil Mechanics • Linear Structural Analysis • Matrix Analysis of Structures • Numerical Methods Graduate Level • Continuum Mechanics • Elasticity • Plasticity • Linear Finite Element Analysis • Non-Linear Finite Element Analysis • Contact Mechanics
Administrative Expertise
My administration expertise derives from years of experience in university governance and professional stewardship. I am currently a Member of the Faculty of Engineering and Built Environment Faculty Board. At the University of Minnesota, I was a Member of the Classroom Advisory Subcommittee, a subcommittee of the University Senate charged with providing advice on issues pertaining broadly to teaching and learning in classrooms. My overarching objective in these positions has been to ensure that the representative views of those directly involved in teaching and research are used to shape policy. On a professional level, I currently Chair the local Chapter of the Australian Geo mechanics Society. Part of this role is to actively engage with industry to bring leading national and international researchers to Newcastle to give seminars, short courses and touring lectures (including the Rankine Lecture on behalf of the Institution of Civil Engineers London, the Terzaghi Lecture on behalf of the ASCE, and the E H Davis Lecture in behalf of the AGS). Prior to acting as Chair, I spent three years in the role of Young Geo technical Professional Representative.
Collaborations
My research aims to advance the understanding of how soils are moved and shaped through interaction with man-made objects and machinery. An overarching goal is to develop rigorous, mechanics-based models for predicting soil deformation and the corresponding force requirements or reactions. These problems pose a tremendous challenge due to the confluence of unsteady plastic flow, potentially three-dimensional deformation, contact interaction, material instabilities, and rate effects from inertial forces and hydro mechanical coupling (for saturated or partially saturated soils). Through collaborative research initiatives, I hope to establish new modelling paradigms to help establish accurate, robust, and efficient computational methods. In collaboration with industry leaders and policymakers, I endeavor to realize the full potential of this work as a means of reducing costs and production times, as well as mitigating consumption and pollution.
Qualifications
- Doctor of Philosophy, University of Minnesota - USA
- Bachelor of Civil Engineering, University of Minnesota - USA
- Master of Science, University of Minnesota - USA
Keywords
- Computational Mechanics
- Geomechanics
- Numerical Analysis
- Plasticity
- Soil-Machine Interaction
- Solid Mechanics
Fields of Research
Code | Description | Percentage |
---|---|---|
090501 | Civil Geotechnical Engineering | 100 |
Professional Experience
Academic appointment
Dates | Title | Organisation / Department |
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1/01/2014 - | Elected Member | University of Newcastle Faculty of Engineering and Built Environment Australia |
1/01/2014 - | Chair | Australian Geomechanics Society Newcastle Chapter Australia |
1/01/2013 - | Membership - International Association of Computational Mechanics | International Association of Computational Mechanics Australia |
1/02/2011 - 1/11/2011 | Casual Academic | University of Newcastle School of Engineering Australia |
1/06/2010 - 1/11/2011 | Post-doctoral Research Associate | University of Newcastle School of Engineering Australia |
1/01/2010 - 1/12/2013 | Young Geotechnical Professional Representative | Australian Geomechanics Society Newcastle Chapter Australia |
1/01/2009 - | Membership - Geo-Institute | Geo-Institute Australia |
1/01/2007 - | Membership - Engineering Mechanics Institute | Engineering Mechanics Institute Australia |
1/01/2006 - 1/06/2009 |
Teaching Assistant Teaching Assistantship |
University of Minnesota Department of Civil Engineering United States |
1/01/2006 - | Membership - Minnesota Geotechnical Society | Minnesota Geotechnical Society United States |
1/08/2005 - 1/06/2010 |
Graduate Research Assistant Assistantship |
University of Minnesota Department of Civil Engineering United States |
1/08/2003 - 1/08/2005 |
Undergraduate Research Assistant Research Asisstantship |
University of Minnesota Department of Mechanical Engineering United States |
1/01/2003 - | Membership - American Society of Civil Engineers | American Society of Civil Engineers United States |
1/11/2002 - 1/08/2005 | Educator and Technician | University of Minnesota Center for Youth Development- Engineering Education United States |
Professional appointment
Dates | Title | Organisation / Department |
---|---|---|
1/06/2005 - 1/09/2005 | Engineering and Design Intern | Barr Engineering Co. Structural and Geotechnical Engineering United States |
Awards
Honours
Year | Award |
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2014 |
ASCE New Faces of Civil Engineering Honouree Unknown |
2005 |
High Distinction University of Minnesota |
2005 |
Simon and Claire Benson Award for Outstanding Undergraduate Achievement University of Minnesota |
Research Award
Year | Award |
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2014 |
Excellent Paper Award International Association for Computer Methods and Advances in Geomechanics |
2010 |
Neville G. W. Cook Award for Innovative Research in Geomechanics University of Minnesota |
2010 |
International Research Fellowship (offered; not accepted) Unknown |
Publications
For publications that are currently unpublished or in-press, details are shown in italics.
Chapter (1 outputs)
Year | Citation | Altmetrics | Link | ||
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2018 |
Muñoz JJ, Hambleton J, Sloan SW, 'R-adaptivity in limit analysis', Advances in Direct Methods for Materials and Structures, Springer International Publishing, Cham, Switzerland 73-84 (2018) [B1]
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Journal article (22 outputs)
Year | Citation | Altmetrics | Link | ||||||||
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2019 |
Shi Z, Hambleton JP, Buscarnera G, 'Bounding surface elasto-viscoplasticity: A general constitutive framework for rate-dependent geomaterials', Journal of Engineering Mechanics, 145 (2019)
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2019 |
Zhao L, Gaudin C, O'Loughlin CD, Hambleton JP, Cassidy MJ, Herduin M, 'Drained Capacity of a Suction Caisson in Sand under Inclined Loading', JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, 145 (2019)
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2018 |
Jin Z, Li W, Jin C, Hambleton J, Cusatis G, 'Anisotropic elastic, strength, and fracture properties of Marcellus shale', INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 109 124-137 (2018)
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2017 |
Hambleton JP, Stanier SA, 'Predicting wheel forces using bearing capacity theory for general planar loads', International Journal of Vehicle Performance, 3 71-88 (2017) [C1]
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2016 |
Iwanec AMS, Carter JP, Hambleton JP, 'Geomechanics of subsidence above single and multi-seam coal mining', JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING, 8 304-313 (2016) [C1]
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2016 |
Stanier S, Dijkstra J, Lesniewska D, Hambleton J, White D, Muir Wood D, 'Vermiculate artefacts in image analysis of granular materials', Computers and Geotechnics, 72 100-113 (2016) [C1]
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2016 |
Hambleton JP, Sloan SW, 'A simplified kinematic method for 3D limit analysis', Applied Mechanics and Materials, 846 342-347 (2016) [C1]
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2015 |
Yu SB, Hambleton JP, Sloan SW, 'Undrained uplift capacity of deeply embedded strip anchors in non-uniform soil', Computers and Geotechnics, 70 41-49 (2015) [C1]
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2014 |
Hambleton JP, Stanier SA, Gaudin C, Todeshkejoei K, 'Analysis of installation forces for helical piles in clay', Australian Geomechanics, 49 73-79 (2014) [C1]
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2014 |
Gaudin C, O'Loughlin CD, Randolph MF, Cassidy MJ, Wang D, Tian Y, et al., 'Advances in offshore and onshore anchoring solutions', Australian Geomechanics, 49 59-71 (2014) [C1]
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2014 |
Hambleton JP, Kouretzis GP, Sloan SW, 'Introduction to the CGSE Special Issue of Australian Geomechanics', Australian Geomechanics, 49 1-2 (2014) [C3]
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2014 |
Yu SB, Hambleton JP, Sloan SW, 'Analysis of Inclined Strip Anchors in Sand Based on the Block Set Mechanism', Applied Mechanics and Materials, 553 422-427 (2014) [C1]
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2014 |
Hambleton JP, Stanier SA, White DJ, Sloan SW, 'Modelling ploughing and cutting processes in soils', Australian Geomechanics Journal, 49 147-156 (2014) [C1] Economic growth in Australia and the rest of the world is linked to the scale of construction and mining, and the amount of earth moved each year in these operations is difficult ... [more] Economic growth in Australia and the rest of the world is linked to the scale of construction and mining, and the amount of earth moved each year in these operations is difficult to fathom. When distributed evenly across the world's population, each individual moves several tonnes of earth each year. This paper highlights current and future research initiatives within the ARC Centre of Excellence for Geotechnical Science and Engineering (CGSE) aimed at developing rigorous, mechanics-based models for fundamental ploughing and cutting processes in soils. State-of-the-art physical modelling is integrated with the development of new techniques for analytical and numerical modelling to elucidate and predict the full progression of forces and deformations in both two-dimensional and three-dimensional processes. A new analytical model for cutting in dry sand is presented, and preliminary results from numerical and physical modelling are described. The analyses reveal effects that available models fail to consider and illustrate how the development of rigorous models may facilitate improvements in production and efficiency in earthmoving operations.
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2013 |
Hambleton JP, Sloan SW, 'A perturbation method for optimization of rigid block mechanisms in the kinematic method of limit analysis', Computers and Geotechnics, 48 260-271 (2013) [C1]
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2013 |
Hambleton JP, Buzzi O, Giacomini A, Spadari M, Sloan SW, 'Perforation of Flexible Rockfall Barriers by Normal Block Impact', ROCK MECHANICS AND ROCK ENGINEERING, 46 515-526 (2013) [C1]
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2012 |
Spadari M, Giacomini A, Buzzi OP, Hambleton JP, 'Prediction of the bullet effect for rockfall barriers: A scaling approach', Rock Mechanics and Rock Engineering, 45 131-144 (2012) [C1]
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2011 |
Abbo AJ, Lyamin AV, Sloan SW, Hambleton JP, 'A C2 continuous approximation to the Mohr-Coulomb yield surface', International Journal of Solids and Structures, 48 3001-3010 (2011) [C1]
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2007 |
Hambleton JP, Drescher A, 'Modeling test rolling on cohesive subgrades', ADVANCED CHARACTERISATION OF PAVEMENT SOIL ENGINEERING MATERIALS, VOLS 1 AND 2, 359-368 (2007)
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Show 19 more journal articles |
Conference (18 outputs)
Year | Citation | Altmetrics | Link | |||||
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2019 |
Jin Z, Hambleton JP, 'Simulation of the Cutting Process in Softening and Hardening Soils', Geotechnical Special Publication (2019) © 2019 American Society of Civil Engineers. Simulation of plowing and cutting processes in soils is challenging and time-consuming due to large deformations and contact interactio... [more] © 2019 American Society of Civil Engineers. Simulation of plowing and cutting processes in soils is challenging and time-consuming due to large deformations and contact interactions. Recent studies on sand have suggested that a simplified, efficient approach based on incremental plastic analysis can capture the essential physics and features of the problem. The present study refines this technique by enhancing the kinematics and implementing a more sophisticated material law. The effects of hardening and softening, as well as dilatancy and compaction, are introduced. With the modified model, it is observed in the case of hardening (compaction) that the occurrence of multiple successive shear bands at variable locations gives the appearance of continuous shearing in the final pattern of deformation. This is markedly different from the previously predicted response in the case of softening (dilatancy), where shear bands appear at distinct locations and transition from one discrete location to the next. The computed results are compared with preliminary experimental data gathered in the Soil-Structure and Soil-Machine Interaction Laboratory (SSI-SMI Laboratory) at Northwestern University.
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2019 |
Nally A, Shi Z, Hambleton JP, 'Optimal Deformation Modes for Estimating Soil Properties', Geotechnical Special Publication (2019) © 2019 American Society of Civil Engineers. Accurate estimation of soil mechanical properties represents a crucial step for most engineering applications. Both in situ and laborat... [more] © 2019 American Society of Civil Engineers. Accurate estimation of soil mechanical properties represents a crucial step for most engineering applications. Both in situ and laboratory testing fundamentally rest on mechanically deforming (actuating) the material and simultaneously measuring its response in terms of displacements and stresses (reactions). Facing this widely adopted scheme, key questions remain unanswered: 1) what is the optimal type and/or mode of actuation that can most effectively extract soil properties; 2) what types of measurements are most useful for inferring material constants? As a first step in the investigation of these questions, an inverse model for the direct simple shear (DSS) test is constructed, wherein measurable responses are used to back-calculate soil properties. Specimens with two different aspect ratios are considered to study the influence of the deformation mode. The effect of the choice of measurements (i.e., which displacements and/or stresses are observed) is explored by assessing inverse model performance considering the DSS test as a boundary value problem, with variable displacement and stress fields, versus the conventional interpretation as an elemental test. Parameter sensitivities and correlation coefficients are employed as quantifiable metrics to compare material characterization based on different aspect ratios and types of measurements, and to interpret the performance of inverse analysis.
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2017 |
Graham D, Shi Z, Hambleton JP, Kouretzis GP, 'Limit loads for pipelines and cylinders partially embedded in frictional materials', 51st US Rock Mechanics / Geomechanics Symposium 2017, San Francisco, CA (2017) [E1]
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2015 |
Kashizadeh E, Hambleton JP, Stanier SA, 'A numerical approach for modelling the ploughing process in sands', Computer Methods and Recent Advances in Geomechanics - Proceedings of the 14th Int. Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014 (2015) [E1] Ploughing processes are difficult to simulate using conventional approaches due to the occurrence of extremely large, predominantly plastic deformation. Numerical techniques such ... [more] Ploughing processes are difficult to simulate using conventional approaches due to the occurrence of extremely large, predominantly plastic deformation. Numerical techniques such as the Material Point Method and the Discrete Element Method are, in principle, capable of reproducing the deformation observed in these evolutionary processes, but they are not without drawbacks, the most significant being the large processing times required. This paper presents a new numerical technique for modeling the ploughing process in sands. The method rests on the assumption that deformation occurs in the formof strong discontinuities, or shear bands, and considers the full process as a sequence of incipient collapse problems.Within an increment of deformation, the collapse mechanism furnishing the least resistance is used to update the deformed configuration and evaluate force. The model incorporates the effect of softening within the shear bands, as well as material avalanching observed as the slope of the free surface reaches the critical angle at which instabilities occur. Theoretical predictions are compared to experiments, and the basic similarities and difference are discussed. © 2015 Taylor & Francis Group, London.
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2015 |
Todeshkejoei C, Hambleton JP, Stanier SA, Gaudin C, 'Modelling installation of helical anchors in clay', Computer Methods and Recent Advances in Geomechanics - Proceedings of the 14th Int. Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014 (2015) [E1] Helical anchors, which are mostly used to resist uplift, are deep foundations installed by rotation into the ground. Despite the central role of the installation process, especial... [more] Helical anchors, which are mostly used to resist uplift, are deep foundations installed by rotation into the ground. Despite the central role of the installation process, especially with respect to the effect of soil disturbance, relatively little is known about the forces and deformations occurring during installation. An exception is the field verification technique known as torque-capacity correlation, which attempts to relate installation torque directly to uplift capacity. However, there are open questions regarding this approach, since not all significant parameters, such as installation vertical force and helix pitch, are taken into consideration. This could be one of the main reasons behind the wide range of torque-correlation factors reported in the literature. This study presents a three-dimensional numerical analysis of the installation process for helical anchors in clay. The results are synthesised into convenient yield envelopes that predict the relationship between installation torque and normal force as functions of helix pitch, roughness, and thickness. The application of the findings to torque-capacity correlation is also discussed. © 2015 Taylor & Francis Group, London.
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2014 |
Suchowerska AM, Carter JP, Hambleton JP, Merifield RM, 'Effect of constitutive behaviour of strata on the prediction of subsidence above single-seam and multi-seam supercritical longwall panels', 9th Triennial Conference on Mine Subsidence, Pokolbin, Australia (2014) [E1]
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2014 |
Suchowerska AM, Hambleton JP, Carter JP, 'Prediction of roof collapse for rectangular underground openings', AusRock 2014: Third Australasian Ground Control in Mining Conference Proceedings, Sydney, NSW (2014) [E1]
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2012 |
Hambleton JP, Buzzi OP, Giacomini A, Spadari M, Sloan SW, 'Perforation of rockfall protection barriers by normal block impact', 46th US Rock Mechanics / Geomechanics Symposium 2012, Chicago, IL (2012) [E1]
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2011 | Hambleton JP, Sloan SW, Pyatigorets AV, Voller VR, 'Lower bound limit analysis using the Control Volume Finite Element Method', Computer Methods for Geomechanics: Frontiers and New Applications. Volume 1, Melbourne, VIC (2011) [E1] | |||||||
2011 |
Hambleton JP, Sloan SW, 'Coordinate perturbation method for upper bound limit analysis', COMGEO II - Proceedings of the 2nd International Symposium on Computational Geomechanics, Cavtat, Croatia (2011) [E1]
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2010 |
Eggen M, Mantell SC, Davidson JH, 'Mechanical Behavior of Random Fiber Composite Perforated Plates', JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME (2010)
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2008 |
Hambleton J, Drescher A, 'Soil damage models for off-road vehicles', Geotechnical Special Publication (2008) Off-road vehicles such as ATVs, SUVs, dirt bikes, and hauling trucks cause damage to soft soils in unpaved areas within parks, forests, wetlands, and tundra. These vehicles can fo... [more] Off-road vehicles such as ATVs, SUVs, dirt bikes, and hauling trucks cause damage to soft soils in unpaved areas within parks, forests, wetlands, and tundra. These vehicles can form deep ruts which result in destruction of vegetation, changes in water absorption/retention, and reduction in aesthetical land values. Large areas of particularly vulnerable soils are becoming increasingly common in northern regions, where permafrost is disappearing as a result of climate change. In this paper, theoretical models that predict the effect of material properties, wheel geometry, and wheel load on wheel penetration and rutting in cohesive soils are presented. The effects of tire flexibility are considered, as well. The models are approximate, yet predict similar response as that obtained from comprehensive numerical simulation. Copyright ASCE 2008.
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2005 |
Eggen M, Hambleton J, Mantell SC, Davidson J, 'Mechanical behavior of random fiber composite perforated plates', 20th Technical Conference of the American Society for Composites 2005 (2005) In this study, the mechanical behavior of perforated, chopped fiber reinforced polymer plates is investigated. These plates serve as a manifold for polymer heat exchangers, where ... [more] In this study, the mechanical behavior of perforated, chopped fiber reinforced polymer plates is investigated. These plates serve as a manifold for polymer heat exchangers, where each perforation would be connected to a tube carrying pressurized fluid. Thus, the plates are subjected to a pressure loading. In order to predict the plate deformation due to the pressure loading, the mechanical bending behavior of these plates is quantified by an equivalent plate modulus E* and equivalent Poisson's ratio ¿*, such that the perforated plate can be modeled as a solid plate. Previous research has shown that by normalizing E* with respect to the modulus of a non-perforated plate, the bending behavior of perforated plates fabricated from isotropic elastic materials was a function of the hole size, spacing and plate thickness. Machining holes in a random fiber composite creates local areas of reduced stiffness due to fiber chopping, while the previous methods used to characterize E*/E assumed uniform, isotropic material properties. The objective of this study is to demonstrate that machined chopped fiber reinforced perforated plates, which have local areas of reduced modulus near the holes, can be characterized by E*/E (an approach which assumes global isotropy). Experimental values for E*/E for non-reinforced (isotropic) and chopped fiber reinforced polymer plates are obtained for a range of hole geometries and two different polymers. These experimental results for E*/E are compared to a model developed for isotropic, elastic materials and also to a finite element solution. |
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Show 15 more conferences |
Other (9 outputs)
Year | Citation | Altmetrics | Link |
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2013 | Todeshkejoei C, Hambleton JP, Gaudin C, Stanier SA, Merifield RM, 'Effects of installation on the capacity of helical anchors in clay', ARC Centre of Excellence for Geotechnical Science and Engineering 2013 Annual Report ( pp.65-66). Callaghan, Australia: ARC Centre of Excellence for Geotechnical Science and Engineering (2013) | ||
2013 | Hambleton JP, Kashizadeh E, 'Simulation of ploughing and cutting in soil by incremental limit analysis', Proceedings of the 12th US National Congress on Computational Mechanics (2013) | ||
2013 | Hambleton JP, Kashizadeh E, 'A numerical approach for modeling evolutionary problems in geomechanics', Proceedings of the Engineering Mechanics Institute Conference (EMI2013) (2013) | ||
Show 6 more others |
Report (1 outputs)
Year | Citation | Altmetrics | Link |
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2008 | Hambleton JP, Drescher A, 'Development of Improved Test Rolling Methods for Roadway Embankment Construction, Final Report', Minnesota Local Road Research Board, 288 (2008) |
Thesis / Dissertation (2 outputs)
Year | Citation | Altmetrics | Link |
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2010 | Hambleton JP, Modeling Test Rolling in Clay, University of Minnesota (2010) | ||
2006 | Hambleton JP, Plastic Analysis of Processes Involving Material-Object Interaction, University of Minnesota (2006) |
Grants and Funding
Summary
Number of grants | 7 |
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Total funding | $118,788 |
Click on a grant title below to expand the full details for that specific grant.
20163 grants / $113,973
Innovating earthmoving mechanics for next-generation infrastructure$98,200
Funding body: ARC (Australian Research Council)
Funding body | ARC (Australian Research Council) |
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Project Team | Doctor James Hambleton |
Scheme | Discovery Early Career Researcher Award (DECRA) |
Role | Lead |
Funding Start | 2016 |
Funding Finish | 2018 |
GNo | G1500271 |
Type Of Funding | Aust Competitive - Commonwealth |
Category | 1CS |
UON | Y |
DVC(RI) Research Support for DECRA (DE16)$8,912
Funding body: University of Newcastle
Funding body | University of Newcastle |
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Project Team | Doctor James Hambleton |
Scheme | DECRA Support |
Role | Lead |
Funding Start | 2016 |
Funding Finish | 2018 |
GNo | G1600523 |
Type Of Funding | Internal |
Category | INTE |
UON | Y |
2016 International Visitor from ETH Zürich – Swiss Federal Institute of Technology Zürich, Switzerland$6,861
Funding body: University of Newcastle
Funding body | University of Newcastle |
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Project Team | Doctor James Hambleton, Professor Alexander Puzin |
Scheme | International Research Visiting Fellowship |
Role | Lead |
Funding Start | 2016 |
Funding Finish | 2016 |
GNo | G1501027 |
Type Of Funding | Internal |
Category | INTE |
UON | Y |
20151 grants / $1,215
2nd Australasian Conference on Computational Mechanics, QUT Gardens Point Campus, Brisbane, Australia, 30 Nov - 1 Dec 2015$1,215
Funding body: University of Newcastle - Faculty of Engineering & Built Environment
Funding body | University of Newcastle - Faculty of Engineering & Built Environment |
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Project Team | Doctor James Hambleton |
Scheme | Travel Grant |
Role | Lead |
Funding Start | 2015 |
Funding Finish | 2015 |
GNo | G1501058 |
Type Of Funding | Internal |
Category | INTE |
UON | Y |
20141 grants / $1,200
14th International Conference of the International Association for Computer Methods and Advances in Geomechanics, Kyoto, Japan, 22-25 September 2014$1,200
Funding body: University of Newcastle - Faculty of Engineering & Built Environment
Funding body | University of Newcastle - Faculty of Engineering & Built Environment |
---|---|
Project Team | Doctor James Hambleton |
Scheme | Travel Grant |
Role | Lead |
Funding Start | 2014 |
Funding Finish | 2014 |
GNo | G1400796 |
Type Of Funding | Internal |
Category | INTE |
UON | Y |
20131 grants / $1,200
Engineering Mechanics Institute Conference 2013, USA 4-7 August 2013$1,200
Funding body: University of Newcastle - Faculty of Engineering & Built Environment
Funding body | University of Newcastle - Faculty of Engineering & Built Environment |
---|---|
Project Team | Doctor James Hambleton |
Scheme | Travel Grant |
Role | Lead |
Funding Start | 2013 |
Funding Finish | 2013 |
GNo | G1300764 |
Type Of Funding | Internal |
Category | INTE |
UON | Y |
20121 grants / $1,200
46th US Rock Mechanics/Geomechanics Symposium, Chicago, USA, 24 - 27 June 2012$1,200
Funding body: University of Newcastle - Faculty of Engineering & Built Environment
Funding body | University of Newcastle - Faculty of Engineering & Built Environment |
---|---|
Project Team | Doctor James Hambleton |
Scheme | Travel Grant |
Role | Lead |
Funding Start | 2012 |
Funding Finish | 2013 |
GNo | G1200410 |
Type Of Funding | Internal |
Category | INTE |
UON | Y |
Research Supervision
Number of supervisions
Past Supervision
Year | Level of Study | Research Title | Program | Supervisor Type |
---|---|---|---|---|
2019 | PhD | Mechanics of Screw Piles in Clay | PhD (Civil Eng), Faculty of Engineering and Built Environment, The University of Newcastle | Principal Supervisor |
2018 | PhD | Adaptive Discontinuity Layout Optimisation For Geotechnical Stability Analysis | PhD (Civil Eng), Faculty of Engineering and Built Environment, The University of Newcastle | Co-Supervisor |
2018 | Masters | Theoretical and Experimental Analysis of the Cutting Process in Sand | M Philosophy (Civil Eng), Faculty of Engineering and Built Environment, The University of Newcastle | Principal Supervisor |
2014 | PhD | The Geomechanics of Single-seam and Multi-seam Longwall Coal Mining | PhD (Civil Eng), Faculty of Engineering and Built Environment, The University of Newcastle | Co-Supervisor |
News
ARC DECRA funding success
November 3, 2015
New Face of Civil Engineering
December 5, 2013
Dr James Hambleton
Position
Conjoint Senior Lecturer
ARC Centre of Excellence for Geotechnical Science and Engineering, Centre for Geotechnical and Materials Modelling
School of Engineering
Faculty of Engineering and Built Environment
Focus area
Civil Engineering
Contact Details
james.hambleton@newcastle.edu.au | |
Phone | (02) 4921 5893 |
Mobile | (04) 2221 5207 |
Fax | (02) 4921 6946 |
Office
Room | EA 215 |
---|---|
Building | Engineering Administration |
Location | Callaghan University Drive Callaghan, NSW 2308 Australia |