TY - JOUR
T1 - A note on the Virtual Crack Closure Technique for a bimaterial interface crack
AU - Banks-Sills, Leslie
AU - Farkash, Elad
N1 - Publisher Copyright:
© 2016, Springer Science+Business Media Dordrecht.
PY - 2016/10/1
Y1 - 2016/10/1
N2 - The Virtual Crack Closure Technique was first presented in 1977 for cracks in linear elastic, homogeneous and isotropic material. It makes use of the Irwin crack closure integral to obtain values of the modes I, II and III energy release rates from finite element data. It can easily be extended to anisotropic material. In addition, it was extended to cracks along an interface between two dissimilar linear elastic, homogeneous and isotropic materials. In that case, the energy release rates were seen to depend upon the size of the virtual crack extension usually taken as the size of the element adjacent to the crack tip. Some attempts have been made to remove this dependence. Nevertheless, in most cases, the accuracy of both the energy release rates and stress intensity factors was not consistently good. In this note, the dependence of the energy release rates on the size of the virtual crack extension for interface cracks is analytically accounted for so that the stress intensity factors may be accurately obtained when fine finite element meshes are used, together with a virtual crack extension consisting of more than one element.
AB - The Virtual Crack Closure Technique was first presented in 1977 for cracks in linear elastic, homogeneous and isotropic material. It makes use of the Irwin crack closure integral to obtain values of the modes I, II and III energy release rates from finite element data. It can easily be extended to anisotropic material. In addition, it was extended to cracks along an interface between two dissimilar linear elastic, homogeneous and isotropic materials. In that case, the energy release rates were seen to depend upon the size of the virtual crack extension usually taken as the size of the element adjacent to the crack tip. Some attempts have been made to remove this dependence. Nevertheless, in most cases, the accuracy of both the energy release rates and stress intensity factors was not consistently good. In this note, the dependence of the energy release rates on the size of the virtual crack extension for interface cracks is analytically accounted for so that the stress intensity factors may be accurately obtained when fine finite element meshes are used, together with a virtual crack extension consisting of more than one element.
KW - Energy release rate
KW - Finite element method
KW - Interface crack
KW - VCCT
UR - http://www.scopus.com/inward/record.url?scp=84969217616&partnerID=8YFLogxK
U2 - 10.1007/s10704-016-0120-z
DO - 10.1007/s10704-016-0120-z
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AN - SCOPUS:84969217616
SN - 0376-9429
VL - 201
SP - 171
EP - 180
JO - International Journal of Fracture
JF - International Journal of Fracture
IS - 2
ER -