On the Plastic Zone around a Crack Tip in a Rock Specimen

DOI

10.2991/emeit.2012.145How to use a DOI?

Keywords

Mises yield criterion, Stress intensity factor, Plastic zone, Boundary collocation method

Abstract

The stress intensity factors (SIFs) for a infinite volume were corrected by two dimensionless quantities YI and YII which were obtained by employing the Boundary Collocation Method (BCM). The expression of the elastic-plastic boundary of a mixed crack for a cracked specimen was formulated based on the Mises yield criterion. Finally, the shape and scale of the plastic zone for tensile-shear cracks and compressive-shear cracks were analyzed and some meaningful conclusions were obtained. The results show that: the shape of a cracked specimen has an significant effect on the plastic zone, the scale of the plastic zone is much smaller than its real scale under the assumption of infinity volume, the orientation angle of a crack affects both the shape and scale of the crack tip plastic zone significantly under tension, the friction between the crack surfaces can reduce the scope of the crack tip plastic zone effectively under compression.

Copyright

© 2012, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - T. Ai
AU  - C.H. Wu
AU  - R. Zhang
AU  - Z.Y. Xiang
AU  - Y.Y. Yuan
PY  - 2012/09
DA  - 2012/09
TI  - On the Plastic Zone around a Crack Tip in a Rock Specimen
BT  - Proceedings of the 2nd International Conference on Electronic & Mechanical Engineering and Information Technology (EMEIT 2012)
PB  - Atlantis Press
SP  - 683
EP  - 686
SN  - 1951-6851
UR  - https://doi.org/10.2991/emeit.2012.145
DO  - 10.2991/emeit.2012.145
ID  - Ai2012/09
ER  -