Identification of Dynamic Damage Mechanics Models and Tensile Fracture Analysis for Multi-Layer Coatings

Abstract

As the first step of the development of a computational tool to evaluate the impact resistance of multi-layer coatings, the authors have conducted the formulation of elasto-viscoplastic damage constitutive equation based on continuum damage mechanics and extended to high strain-rate behaviors, the identification of the constitutive modeling based on the tensile test results for each layer material, and its applications to the finite element analysis of tensile fracture behaviors of multi-layer coatings. The obtained results of the identification of constitutive modeling and the tensile fracture analysis have agreed well with the corresponding experimental results. The present dynamic damage mechanics models can be expected to be used as a computational tool for the evaluation and the design of multi-layer coatings.