TY - JOUR
T1 - An interaction integral method for computing mixed mode stress intensity factors for curved bimaterial interface cracks in non-uniform temperature fields
AU - Johnson, Janine
AU - Qu, Jianmin
PY - 2007/9
Y1 - 2007/9
N2 - In finite element analysis the interaction integral has been a useful tool for computing the stress intensity factors for fracture analysis. This work extends the interaction integral to account for non-uniform temperatures in the calculation of stress intensity factors for three dimensional curvilinear cracks either in a homogeneous body or on a bimaterial interface. First, the derivation of the computational algorithm, which includes the additional terms developed by the non-zero gradient of the temperature field, is presented in detail. The algorithm is then implemented in conjunction with commercial finite element software to calculate the stress intensity factors of a crack undergoing non-uniform temperatures on both a homogeneous and a bimaterial interface. The numerical results displayed path independence and showed excellent agreement with available analytical solutions.
AB - In finite element analysis the interaction integral has been a useful tool for computing the stress intensity factors for fracture analysis. This work extends the interaction integral to account for non-uniform temperatures in the calculation of stress intensity factors for three dimensional curvilinear cracks either in a homogeneous body or on a bimaterial interface. First, the derivation of the computational algorithm, which includes the additional terms developed by the non-zero gradient of the temperature field, is presented in detail. The algorithm is then implemented in conjunction with commercial finite element software to calculate the stress intensity factors of a crack undergoing non-uniform temperatures on both a homogeneous and a bimaterial interface. The numerical results displayed path independence and showed excellent agreement with available analytical solutions.
KW - Finite element analysis
KW - Interaction integral
KW - Interface fracture
KW - Stress intensity factor
KW - Thermal stress
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U2 - 10.1016/j.engfracmech.2006.10.008
DO - 10.1016/j.engfracmech.2006.10.008
M3 - Article
AN - SCOPUS:34047241962
SN - 0013-7944
VL - 74
SP - 2282
EP - 2291
JO - Engineering Fracture Mechanics
JF - Engineering Fracture Mechanics
IS - 14
ER -