Imperial College London
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Professor Reiko J. Tanaka

Faculty of Engineering, Department of Bioengineering

Professor of Computational Systems Biology & Medicine
 
 
 
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Contact

 

+44 (0)20 7594 6374r.tanaka Website

 
 
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Location

 

RSM 3.10Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Yamakawa:2017:10.1002/nag.2711,
author = {Yamakawa, Y and Ikeda, K and Saiki, I and Desrues, J and Tanaka, RJ},
doi = {10.1002/nag.2711},
journal = {International Journal for Numerical and Analytical Methods in Geomechanics},
pages = {3--33},
title = {Diffuse bifurcations engraving diverse shear bands in granular materials},
url = {http://dx.doi.org/10.1002/nag.2711},
volume = {42},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Shear bands with characteristic spatial patterns observed in an experiment for a cubic or parallelepipedspecimen of dry dense sand were simulated by numerical bifurcation analysis using the Cam-clay plasticitymodel. By incorporating the subloading surface concept into the plasticity model, the model became capableof reproducing hardening/softening and contractive/dilative behavior observed in the experiment. The modelwas re-formulated to be compatible with the multiplicative hyperelasto-plasticity for  nite strains. Thisenhanced constitutive model was implemented into a  nite-element code reinforced by a stress updatingalgorithm based on the return-mapping scheme, and by an efficient numerical procedure to compute criticaleigenvectors of elastoplastic tangent stiffness matrix at bifurcation points. The emergence of diamond-likeand column-like diffuse bifurcation modes breaking uniformity of the materials, followed by the evolutionof shear bands through strain localization, was observed in the analysis. In the bifurcation analysis of planestrain compression test, unexpected bifurcation modes, which break out-of-plane uniformity and lead tothree-dimensional diamond-like patterns, were detected. Diffuse bifurcations, which are difficult to observeby experiments, have thus been found as a catalyst creating diverse shear band patterns.
AU  - Yamakawa,Y
AU  - Ikeda,K
AU  - Saiki,I
AU  - Desrues,J
AU  - Tanaka,RJ
DO  - 10.1002/nag.2711
EP  - 33
PY  - 2017///
SN  - 1096-9853
SP  - 3
TI  - Diffuse bifurcations engraving diverse shear bands in granular materials
T2  - International Journal for Numerical and Analytical Methods in Geomechanics
UR  - http://dx.doi.org/10.1002/nag.2711
UR  - http://hdl.handle.net/10044/1/48622
VL  - 42
ER  -
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