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Finite Element Modelling of a Cellular Electric Microenvironment

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Multi-scale damage modelling in a ceramic matrix composite using a finite-element microstructure meshfree

L Saucedo-Mora¹, T J Marrow²

¹Institute Eduardo Torroja for Construction Sciences-CSIC, Madrid, Spain.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences

|June 1, 2016

Summary

This study demonstrates a new Finite-Element Microstructure Meshfree (FEMME) model for multi-scale damage analysis in SiC composite tubes. The model accurately captures microstructural features influencing component-level structural integrity.

Keywords:

cellular automata composites damage finite element multi-scale modelling

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Area of Science:

Materials Science
Mechanical Engineering
Computational Mechanics

Background:

Multi-scale modeling is crucial for understanding composite material behavior.
SiC ceramic composites are vital for high-temperature applications.
Accurate representation of microstructure is key to predicting damage.

Purpose of the Study:

To demonstrate the Finite-Element Microstructure Meshfree (FEMME) model's capability in multi-scale damage modeling.
To integrate microstructural details like porosity and fiber tow behavior into component-level analysis.
To validate the model against experimental data for SiC composite tubes.

Main Methods:

Development and application of the FEMME model, coupling finite-element, cellular automata, and meshfree layers.
Incorporation of microstructural features: porosity location/orientation/geometry, fiber tow load-carrying capability, and failure behavior.
Experimental validation using X-ray computed tomography and digital volume correlation on axially loaded composite tubes.

Main Results:

The FEMME model successfully introduced critical microstructural aspects into the larger scale component model.
The model demonstrated the ability to predict quasi-brittle failure behavior influenced by microstructure.
Comparison with experimental observations showed good correlation in damage development.

Conclusions:

The FEMME model is effective for multi-scale damage assessment in SiC composite tubes.
Further refinement of the model can enhance its fidelity to microstructural complexities.
This approach advances the structural integrity analysis of advanced composite materials.