General transmission conditions for thin elasto-plastic pressure-dependent interphase between dissimilar materials

TL;DR

This paper derives nonlinear transmission conditions for a thin pressure-sensitive elasto-plastic interphase between dissimilar materials, validated through finite element analysis, advancing understanding of interface behavior in composite structures.

Contribution

It introduces a novel asymptotic approach and deformation theory formulation to model pressure-dependent elasto-plastic interfaces as zero-thickness transmission conditions.

Findings

Transmission conditions accurately predict interface behavior.

Finite element analysis confirms validity of the derived conditions.

Enhanced modeling of pressure-sensitive interphases in composite materials.

Abstract

We consider a thin soft adhesive interphase between dissimilar elastic media. The material of the intermediate layer is modelled by elasto-plastic pressure-sensitive constitutive law. An asymptotic procedure, together with a novel formulation of the deformation theory of plasticity for pressure-sensitive materials, is used in order to derive nonlinear transmission conditions for the corresponding imperfect zero-thickness interface. A FEM analysis of the original three-phase structure is performed to validate the transmission conditions for the simplified bimaterial structure.