Load-Dependent Power-Law Exponent in Creep Rupture of Heterogeneous Materials

Chloé Braux; Antoine Bérut; Loïc Vanel

doi:10.1103/35tp-f364

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arXiv · 2506.06145

Load-Dependent Power-Law Exponent in Creep Rupture of Heterogeneous Materials

Chloé Braux·Antoine Bérut·Loïc Vanel

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Abstract

Creep tests on heterogeneous materials under subcritical loading typically show a power-law decaying strain rate before failure, with the exponent often considered material-dependent but independent of applied stress. By imposing successive small stress relaxations through a displacement feedback loop, we probe creep dynamics and show experimentally that this exponent varies with both applied load and loading direction. Simulations of a disordered fiber bundle model reproduce this load dependence, demonstrating that such models capture essential features of delayed rupture dynamics.

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Chloé Braux, Antoine Bérut, Loïc Vanel. 2025-06-06. Load-Dependent Power-Law Exponent in Creep Rupture of Heterogeneous Materials. https://doi.org/10.1103/35tp-f364

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