TY - JOUR
T1 - 3D Crack Growth in Biaxial Compression
T2 - Influence of Shape and Inclination of Initial Cracks
AU - Wang, Hongyu
AU - Dyskin, Arcady
AU - Pasternak, Elena
AU - Dight, Phil
PY - 2020/7/1
Y1 - 2020/7/1
N2 - An experimental study of 3-D crack growth from initial cracks of different shapes and inclinations in biaxial compression with different biaxial load ratios (σx/ σy) 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 σx/ σy 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.
AB - An experimental study of 3-D crack growth from initial cracks of different shapes and inclinations in biaxial compression with different biaxial load ratios (σx/ σy) 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 σx/ σy 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.
KW - Biaxial compression
KW - Penny-shape crack
KW - Square-shape crack
KW - Transparent brittle specimen
KW - Wing crack
UR - http://www.scopus.com/inward/record.url?scp=85082859817&partnerID=8YFLogxK
U2 - 10.1007/s00603-020-02089-0
DO - 10.1007/s00603-020-02089-0
M3 - Article
AN - SCOPUS:85082859817
SN - 0723-2632
VL - 53
SP - 3161
EP - 3183
JO - Rock Mechanics and Rock Engineering
JF - Rock Mechanics and Rock Engineering
IS - 7
ER -