TY - JOUR
T1 - A new cohesive zone model for mixed mode interface fracture in bimaterials
AU - Freed, Yuval
AU - Banks-Sills, Leslie
PY - 2008/10
Y1 - 2008/10
N2 - A new two-dimensional cohesive zone model which is suitable for the prediction of mixed mode interface fracture in bimaterials is presented. The model accounts for the well known fact that the interfacial fracture toughness is not a constant, but a function of the mode mixity. Within the framework of this model, the cohesive energy and the cohesive strength are not chosen to be constant, but rather functions of the mode mixity. A polynomial cohesive zone model is derived in light of analytical and experimental observations of interface cracks. The validity of the new cohesive law is examined by analyzing double cantilever beam and Brazilian disk specimens. The methodology to determine the parameters of the model is outlined and a failure criterion for a pair of ceramic clays is suggested.
AB - A new two-dimensional cohesive zone model which is suitable for the prediction of mixed mode interface fracture in bimaterials is presented. The model accounts for the well known fact that the interfacial fracture toughness is not a constant, but a function of the mode mixity. Within the framework of this model, the cohesive energy and the cohesive strength are not chosen to be constant, but rather functions of the mode mixity. A polynomial cohesive zone model is derived in light of analytical and experimental observations of interface cracks. The validity of the new cohesive law is examined by analyzing double cantilever beam and Brazilian disk specimens. The methodology to determine the parameters of the model is outlined and a failure criterion for a pair of ceramic clays is suggested.
KW - Cohesive zone modeling
KW - Constitutive modeling
KW - Finite element analysis
KW - Interface fracture
KW - Mixed mode fracture
UR - http://www.scopus.com/inward/record.url?scp=47549083669&partnerID=8YFLogxK
U2 - 10.1016/j.engfracmech.2008.04.013
DO - 10.1016/j.engfracmech.2008.04.013
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AN - SCOPUS:47549083669
VL - 75
SP - 4583
EP - 4593
JO - Engineering Fracture Mechanics
JF - Engineering Fracture Mechanics
SN - 0013-7944
IS - 15
ER -