Finite deformation near a crack tip terminated at an interface between two neo-Hookean sheets

A crack terminating at an arbitrary angle to the interface between two neo-Hookean sheets is investigated under plane stress conditions using finite deformation theory. The asymptotic crack-tip deformation and stress fields are analyzed as a function of the ratio of the moduli and the angle of the crack relative to the interface. Full-field numerical calculations and experimental studies validate the analytical results. A stretch-based crack growth criterion is developed using crack-tip field solutions. Such criterion can predict the delay of crack growth through the bi-material interface observed in experiments and can be extended to any heterogeneity and material.

Automated summary

In this study, a crack terminating at an arbitrary angle to the interface between two neo-Hookean sheets was investigated under plane stress conditions using finite deformation theory. The asymptotic crack-tip deformation and stress fields were analyzed with respect to the ratio of moduli and crack angle relative to the interface. A stretch-based crack growth criterion was developed to predict the delay of crack growth through bi-material interface, and could be extended to any heterogeneity and material based on experimental validation.