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Details of Grant 

EPSRC Reference: GR/R05260/01
Title: Multiaxial Stiffness of Sand
Principal Investigator: Muir Wood, Professor D
Other Investigators:
Lings, Dr ML Nash, Mr D
Researcher Co-Investigators:
Project Partners:
Department: Civil Engineering
Organisation: University of Bristol
Scheme: Standard Research (Pre-FEC)
Starts: 01 February 2001 Ends: 31 October 2004 Value (£): 229,627
EPSRC Research Topic Classifications:
Ground Engineering Pavement Engineering
EPSRC Industrial Sector Classifications:
Construction No relevance to Underpinning Sectors
Related Grants:
Panel History:  
Summary on Grant Application Form
Stress probe tests on dry sand will be performed in two test apparatus in order to explore non-monotonic anisotropic stiffness and basic hypotheses of constitutive models for sand under a wide range of stress states. Testing will use a flexible boundary Cubical Cell and a rigid boundary True Triaxial Apparatus each having 3 degrees of freedom with independent control of principal stresses and fixed principal axes. Piezo-ceramic bender and compression elements will be used in the Cubical Cell to deduce the changing anisotropy of 'zero' strain stiffness for the orthorhombic material created through the application of multiaxial stress states to a material with initial depositional fabric. Elastic-plastic kinematic hardening models will be evaluated for stress:strain response at small/medium strain levels, seeking information about the size and shape of the elastic region that can be pragmatically incorporated in such models, and the nature of the plastic flow.
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Organisation Website: http://www.bris.ac.uk