Toward a virtual material for lifetime prediction of CMCs

TL;DR

This paper introduces a multi-scale hybrid model, called virtual material, designed to predict the lifetime of Self-Healing Ceramic Matrix Composites by integrating mechanical and chemical processes, with ongoing development of the chemical component.

Contribution

It presents the initial development of a multi-physics hybrid model for CMC lifetime prediction, combining mechanical and chemical modeling approaches.

Findings

Mechanical model provides detailed crack morphology data.

Chemical model aims to predict self-healing and failure processes.

Model development is ongoing, with chemical predictions not yet finalized.

Abstract

A first version of a multi-scale, multi-physic hybrid model --called virtual material-- for predictions on Self-Healing Ceramic Matrix Composite's (CMCs) lifetime is presented. The model has a mechanical and a chemical part, which are presented here in their actual state of development. The mechanical part provides precise data for the chemical models through an hybrid --melting continuum damage macro model discrete crack surfaces-- representation of the morphology of the crack network at yarn scale. The chemical part should provide predictions on the structure's lifetime using a model of the self-healing process, not yet achieved then not presented here, and a model of fiber sub-critical failure under mechanical and chemical load.