A strain energy density criterion for the initiation of edge debonding

作者：Martin Eric^*; Leguillon Dominique

来源：Theoretical and Applied Fracture Mechanics, 2015, 79: 58-61.

DOI：10.1016/j.tafmec.2015.06.011

• Crack initiation
• Coupled criterion
• Strain energy density
• Brittle fracture

Material or geometrical discontinuities within a structure induce a localized stress concentration which may initiate a crack leading to catastrophic failure in brittle materials. To assess crack initiation in the vicinity of a V-notch, a criterion based on the strain energy density (SED) averaged over a volume surrounding the notch tip is an attractive approach. It is demonstrated that this criterion can also be used to predict crack initiation along an interface. The precise definition of the control volume is obtained with the help of a coupled criterion which relies on finite fracture mechanics.

• 出版日期2015-10