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De-localizing brittle fracture

Abstract : Localization of damage in conventional brittle materials is the source of a host of undesirable effects. In this paper, we show how artificially engineered metamaterials with all brittle constituents can be designed to ensure that every breakable sub-element fails independently. The crucial role in the proposed design is played by high contrast composite sub-structures with zero-stiffness, furnishing nonlocal stress redistribution. The de-localized cracking of the resulting nominally brittle systems can be linked to the fact that their continuum description is dominated by gradient rather than classical elasticity. By engineering a crossover from brittle to effectively ductile (quasi-brittle) behavior, we elucidate the structural aspects distinguishing macro-cracking-dominated fracture from micro-cracking-dominated damage.
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https://hal.archives-ouvertes.fr/hal-02993994
Contributor : Oguz Umut Salman <>
Submitted on : Saturday, November 7, 2020 - 9:55:00 AM
Last modification on : Tuesday, December 8, 2020 - 3:34:44 AM
Long-term archiving on: : Monday, February 8, 2021 - 6:46:58 PM

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  • HAL Id : hal-02993994, version 1

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Oguz Umut Salman, L Truskinovsky. De-localizing brittle fracture. 2020. ⟨hal-02993994⟩

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