Enhanced fault tolerance in biomimetic hierarchical materials: A simulation study

Hosseini SA, Moretti P, Zaiser M (2023)

Publication Type: Journal article

Publication year: 2023


Book Volume: 7

Article Number: 053612

Journal Issue: 5

DOI: 10.1103/PhysRevMaterials.7.053612


Hierarchical microstructures are often invoked to explain the high resilience and fracture toughness of biological materials such as bone and nacre. Biomimetic material models inspired by such hierarchical biomaterials face the obvious challenge of capturing their inherent multiscale complexity, both in experiments and in simulations. To study the influence of hierarchical microstructure on fracture properties, we propose a large-scale three-dimensional hierarchical beam-element simulation framework, in which we generalize the constitutive framework of Timoshenko beam elasticity and maximum distortion energy theory failure criteria to the complex case of hierarchical networks of up to six self-similar hierarchical levels, consisting of approximately 5 million elements. We perform a statistical study of stress-strain relationships and fracture surface morphologies and conclude that hierarchical systems are capable of arresting crack propagation, an ability that reduces their sensitivity to preexisting damage and enhances their fault tolerance compared to reference fibrous materials without microstructural hierarchy.

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Hosseini, S.A., Moretti, P., & Zaiser, M. (2023). Enhanced fault tolerance in biomimetic hierarchical materials: A simulation study. Physical Review Materials, 7(5). https://dx.doi.org/10.1103/PhysRevMaterials.7.053612


Hosseini, Seyyed Ahmad, Paolo Moretti, and Michael Zaiser. "Enhanced fault tolerance in biomimetic hierarchical materials: A simulation study." Physical Review Materials 7.5 (2023).

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