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Understanding the thermomechanical behavior of a TATB-based explosive via microstructure-level simulations. Part I: Microcracking and viscoelasticity
Abstract : In view of a better understanding of the thermomechanical behavior of pressed explosives, a Fourier-based computational tool is used to perform numerical homogenization and compare predictions to experimental macroscopic properties. This is first done in a purely thermoelastic context on simplified polycrystalline virtual microstructures, then extended to cracked polycrystalline ones. A further extension is proposed, aiming at predicting the nucleation and propagation of (micro)-cracks. Besides, a mean-field (self-consistent) approach is also followed, providing accurate thermoelastic predictions. It is currently being extended to account for linear (non-ageing) viscoelasticity of the binder. The study of irreversible deformation mechanisms of the TATB crystal, in view of their incorporation in the full-field tool, is the subject of the companion paper.
Cited literature [37 references]
https://hal.archives-ouvertes.fr/hal-02312483
Contributor : François Willot Connect in order to contact the contributor
Submitted on : Friday, October 11, 2019 - 11:14:54 AM
Last modification on : Friday, December 3, 2021 - 11:42:51 AM
Contributor : François Willot Connect in order to contact the contributor
Submitted on : Friday, October 11, 2019 - 11:14:54 AM
Last modification on : Friday, December 3, 2021 - 11:42:51 AM
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