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Rock Mechanics and Rock Engineering

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20-03-2020 | Original Paper

3D Crack Growth in Biaxial Compression: Influence of Shape and Inclination of Initial Cracks

Authors: Hongyu Wang, Arcady Dyskin, Elena Pasternak, Phil Dight

Published in: Rock Mechanics and Rock Engineering | Issue 7/2020

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Abstract

An experimental study of 3-D crack growth from initial cracks of different shapes and inclinations in biaxial compression with different biaxial load ratios (\( \sigma_{x} /\sigma_{y} \)) is presented. Unlike 3-D crack growth in uniaxial compression, which is characterised by the presence of intrinsic limits on 3-D growth of wing cracks associated with wing wrapping, in biaxial compression the wing crack can grow extensively and is parallel to the free surfaces of the specimen as long as the \( \sigma_{x} /\sigma_{y} \) ratio exceeds a threshold. Surprisingly, the threshold is extremely low: around 0.05 for all cases considered; below this threshold, the wing crack growth is restricted. It is found that the shape and inclination of the initial crack have minor effect on this transition process.

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Title: 3D Crack Growth in Biaxial Compression: Influence of Shape and Inclination of Initial Cracks
Authors: Hongyu Wang
Arcady Dyskin
Elena Pasternak
Phil Dight
Publication date: 20-03-2020
Publisher: Springer Vienna
Published in: Rock Mechanics and Rock Engineering / Issue 7/2020
Print ISSN: 0723-2632
Electronic ISSN: 1434-453X
DOI: https://doi.org/10.1007/s00603-020-02089-0

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