A peridynamic mechano-chemical damage model for stress-assisted corrosion

Abstract

We introduce a mechano-chemical coupled peridynamic model for stress-assisted corrosion. In the model, the activation-controlled anodic dissolution is a function of nonlocal dilatation of material near the corrosion front. We use a new experimental design to measure anodic dissolution rate for copper under activation-controlled and applied tensile stress. The experimental results are used to calibrate and then validate the new model. A case for stress-assisted corrosion in a complex geometry with non-uniform stress distribution is included to demonstrate the model's capabilities.