Imperial College London
Alternate

Professor M Ahmer Wadee

Faculty of Engineering, Department of Civil and Environmental Engineering

Professor of Nonlinear Mechanics
 
 
 
//

Contact

 

+44 (0)20 7594 6050a.wadee Website

 
 
//

Assistant

 

Ms Ruth Bello +44 (0)20 7594 6040

 
//

Location

 

421Skempton BuildingSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Hanley:2015:10.1098/rsos.150038,
author = {Hanley, KJ and O'Sullivan, C and Wadee, MA and Huang, X},
doi = {10.1098/rsos.150038},
journal = {Royal Society Open Science},
title = {Use of elastic stability analysis to explain the stress-dependent nature of soil strength},
url = {http://dx.doi.org/10.1098/rsos.150038},
volume = {2},
year = {2015}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The peak and critical state strengths of sands are linearly related to the stress level, just as the frictional resistance to sliding along an interface is related to the normal force. The analogy with frictional sliding has led to the use of a ‘friction angle’ to describe the relationship between strength and stress for soils. The term ‘friction angle’ implies that the underlying mechanism is frictional resistance at the particle contacts. However, experiments and discrete element simulations indicate that the material friction angle is not simply related to the friction angle at the particle contacts. Experiments and particle-scale simulations of model sands have also revealed the presence of strong force chains, aligned with the major principal stress. Buckling of these strong force chains has been proposed as an alternative to the frictional-sliding failure mechanism. Here, using an idealized abstraction of a strong force chain, the resistance is shown to be linearly proportional to the magnitude of the lateral forces supporting the force chain. Considering a triaxial stress state, and drawing an analogy between the lateral forces and the confining pressure in a triaxial test, a linear relationship between stress level and strength is seen to emerge from the failure-by-buckling hypothesis.
AU  - Hanley,KJ
AU  - O'Sullivan,C
AU  - Wadee,MA
AU  - Huang,X
DO  - 10.1098/rsos.150038
PY  - 2015///
SN  - 2054-5703
TI  - Use of elastic stability analysis to explain the stress-dependent nature of soil strength
T2  - Royal Society Open Science
UR  - http://dx.doi.org/10.1098/rsos.150038
UR  - http://hdl.handle.net/10044/1/24032
VL  - 2
ER  -
Download