TY - GEN
T1 - Research on the fracture mechanism of coal with three collinear cracks filling with gas
AU - Jin, Wencheng
AU - Zhu, Zheming
AU - Hu, Zheyuan
PY - 2012
Y1 - 2012
N2 - Coal usually contains many cracks which affect the stability of mining zone. In order to research the fracture mechanism of cracked coal, a special case of three collinear cracks filling with gas is considered. A set of complex stress functions which satisfy all the required conditions are first derived, based on Muskelishvili's results. The least square boundary collocation method is used to enforce the external boundaries approximately, and the stress intensity factors (SIF) can then be computed according to the related formulae. The value of SIFs for different crack orientations, different crack distance under different loading are calculated. The results shows that the most unfavorable crack orientation is in the 45° angle and the confining stress and the distance between cracks have a considerable effect on the SIF value.
AB - Coal usually contains many cracks which affect the stability of mining zone. In order to research the fracture mechanism of cracked coal, a special case of three collinear cracks filling with gas is considered. A set of complex stress functions which satisfy all the required conditions are first derived, based on Muskelishvili's results. The least square boundary collocation method is used to enforce the external boundaries approximately, and the stress intensity factors (SIF) can then be computed according to the related formulae. The value of SIFs for different crack orientations, different crack distance under different loading are calculated. The results shows that the most unfavorable crack orientation is in the 45° angle and the confining stress and the distance between cracks have a considerable effect on the SIF value.
KW - Boundary collocation method
KW - Collinear crack
KW - Complex function
KW - Stress intensity factor
UR - https://www.scopus.com/pages/publications/82655182288
U2 - 10.4028/www.scientific.net/AMM.142.201
DO - 10.4028/www.scientific.net/AMM.142.201
M3 - Conference contribution
AN - SCOPUS:82655182288
SN - 9783037853054
T3 - Applied Mechanics and Materials
SP - 201
EP - 204
BT - Intelligent Materials, Applied Mechanics and Design Science, IMAMD2011
T2 - 2011 International Conference on Intelligent Materials, Applied Mechanics and Design Science, IMAMD2011
Y2 - 24 December 2011 through 25 December 2011
ER -