In this work we use finite deformation theory to characterize deformation fields around crack tips in soft materials. We specifically consider the scenario in which the crack tip terminates at an arbitrary angle to the interface between two Neo-Hookean sheets. We investigate the effect of the angle of the crack relative to the interface and the ratio of moduli of the two sheets on the crack tip deformation and stress singularities. We also investigate the angular dependence of the hoop stresses around the crack tip to gain insight into the likely direction of crack penetration. Numerical and experimental investigations are also conducted to validate the derived results. We utilize our results to explain apparent toughening observed in heterogeneous soft composites.

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

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