cohesive zone modeling of interface fracture
It appears to me many have been struggling with various issues in cohesive zone modeling of interfacial fracture, despite the fact that it has been well established theoretically and has been demonstrated many times in various forms. A common question (which we share) is with the use of the cohesive elements implemented in ABAQUS. Apparently, the standard implementation of the cohesive traction-separation laws in ABAQUS differs subtly from many other implementations in literature. Of course, ABAQUS has the flexibility for customized implementation through user subroutines, but many may not go that way. For some industrially oriernted applications, we have tried to use the standard cohesive elements in ABAQUS with limited success. Attached is a conference paper in which we share our understanding from this experience. There remain many unanswered questions (mostly numerical), and we welcome discussions and sharing of both sucessful and unsuccessful experience.
This paper may be cited as: H. Mei, S. Gowrishankar, K.M. Liechti, and R. Huang, Proc. 12th IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, 2010. DOI: 10.1109/ITHERM.2010.5501290.