Fracture Mechanics and Fatigue Design in Metallic Materials

Rozumek, Dariusz

doi:10.3390/met11121957

Cited by 1 publication

(1 citation statement)

References 11 publications

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“…Cortical bone: Sacrificial bond rupture and collagen fibril sliding impede the crack initiation; microcrack, ligament bridges, and weak interface induce the crack deflection and slows the crack propagation; remodeling substitutes old or damaged bone with new bone tissue ( 9 , 40 ). Metal: Twin boundaries (TB) and grain boundaries (GB) suppress dislocation activities; nano inclusions retard microcrack propagation ( 41 ). FFR: External load is translated by the folding fan–like structure (I) to circumferential deformation without inducing stress concentration; the hard-soft complex structure consisting of radially aligned nanowires (II) deforms compatibly to sustain the circumferential deformation, while the soft matrix (III) undertakes most of the volume compression; twin boundaries (IV) along the length direction of the nanowires provide a bottom-level guarantee to the aragonite nanowires against bending fracture.…”

Section: Discussionmentioning

confidence: 99%

Deformable hard tissue with high fatigue resistance in the hinge of bivalve Cristaria plicata

Meng

Zhou

Liu

et al. 2023

Science

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The hinge of bivalve shells can sustain hundreds of thousands of repeating opening-and-closing valve motions throughout their lifetime. We studied the hierarchical design of the mineralized tissue in the hinge of the bivalve Cristaria plicata , which endows the tissue with deformability and fatigue resistance and consequently underlies the repeating motion capability. This folding fan–shaped tissue consists of radially aligned, brittle aragonite nanowires embedded in a resilient matrix and can translate external radial loads to circumferential deformation. The hard-soft complex microstructure can suppress stress concentration within the tissue. Coherent nanotwin boundaries along the longitudinal direction of the nanowires increase their resistance to bending fracture. The unusual biomineral, which exploits the inherent properties of each component through multiscale structural design, provides insights into the evolution of antifatigue structural materials.

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Section: Discussionmentioning

confidence: 99%