Heterogeneous Strain and Bonded Granular Structure Change in Triaxial Specimen Studied by Computer Tomography
Publication: Journal of Engineering Mechanics
Volume 129, Issue 11
Abstract
In recent years, the method of x-ray computer tomography imaging has been used to characterize the microstructure of asphalt concrete, cement concrete, soil, and rock. This paper focuses on developing an algorithm that links the particle identity at different load steps and thus provides sequential movements of particles. The measured data from a specimen under triaxial load is analyzed to study the nonuniform strain field and to identify shear band formation. Packing structure change and the evolution of fabric tensors due to external load are discussed. The validity of a commonly used kinematic hypothesis in granular mechanics is also evaluated.
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Information
Published In
Journal of Engineering Mechanics
Volume 129 • Issue 11 • November 2003
Pages: 1295 - 1307
Copyright
Copyright © 2003 American Society of Civil Engineers.
History
Received: Mar 8, 2002
Accepted: Mar 24, 2003
Published online: Oct 15, 2003
Published in print: Nov 2003
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