James Paul Hambleton

  • 251 Citations
20052024
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Personal profile

Research Interests

Dr. Hambleton’s main research interests are in computational plasticity, geotechnical analysis, contact mechanics, soil-machine interaction, and the analysis of problems involving unsteady plastic flow. A major focal point of his work over the coming years is to advance the understanding of how soils are moved and shaped through interaction with man-made objects and machinery. The overarching goal of these activities is to develop rigorous, mechanics-based models for predicting soil deformation and the corresponding force requirements or reactions. From a theoretical perspective, problems involving soil-machine interaction 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 hydromechanical coupling (for saturated or partially saturated soils). This work endeavors to discover new modelling paradigms to help establish accurate, robust, and efficient computational methods. From a practical viewpoint, the scale of operations involving soil-machine interaction across the face of the Earth is difficult to fathom. For housing excavations, mineral production, and road building alone, each individual moves several tons of earth each year when distributed evenly across the world’s population. Breakthroughs in understanding will therefore have profound long-term effects with respect to reducing costs and production times, as well as mitigating consumption and pollution.

Dr. Hambleton’s specific areas of interest include

•           plowing (ploughing) and cutting of soils and rocks in earthmoving operations,

•           installation processes for screw anchors and screw foundations,

•           penetration-based testing for in situ characterization of soil strength and deformability, and

•           soil-wheel interaction for off-road vehicles.

Education/Academic qualification

Civil Engineering (Geomechanics), PhD, University of Minnesota

… → 2010

Civil Engineering (Geomechanics), MS, University of Minnesota

… → 2006

Civil Engineering (Structural Engineering), BCE, University of Minnesota

… → 2005

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Grants 2017 2024

Robotics
Soils
Museums
Civil engineering
Education
Robots
Geomechanics
Catheters
Testbeds
Tissue
plowing
infrastructure
geotechnical engineering
research program
modeling

Research Output 2005 2019

Viscoplasticity
Strain rate
Clay
Optical character recognition
Cams

Drained capacity of a suction caisson in sand under inclined loading

Zhao, L., Gaudin, C., O'Loughlin, C. D., Hambleton, J. P., Cassidy, M. J. & Herduin, M., Feb 1 2019, In : Journal of Geotechnical and Geoenvironmental Engineering. 145, 2, 04018107.

Research output: Contribution to journalArticle

Caissons
caisson
suction
Sand
sand

Optimal Deformation Modes for Estimating Soil Properties

Nally, A., Shi, Z. & Hambleton, J. P., Jan 1 2019, In : Geotechnical Special Publication. 2019-March, GSP 310, p. 541-550 10 p.

Research output: Contribution to journalConference article

soil property
shear test
Soils
Aspect ratio
inverse analysis

Simulation of the Cutting Process in Softening and Hardening Soils

Jin, Z. & Hambleton, J. P., Jan 1 2019, In : Geotechnical Special Publication. 2019-March, GSP 310, p. 11-19 9 p.

Research output: Contribution to journalConference article

shear band
dilatancy
softening
hardening
Hardening
5 Citations (Scopus)

Anisotropic elastic, strength, and fracture properties of Marcellus shale

Jin, Z., Li, W., Jin, C., Hambleton, J. P. & Cusatis, G., Sep 1 2018, In : International Journal of Rock Mechanics and Mining Sciences. 109, p. 124-137 14 p.

Research output: Contribution to journalArticle

Shale
shale
mechanical property
bedding plane
size effect