期刊
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
卷 278, 期 1705, 页码 519-525出版社
ROYAL SOC
DOI: 10.1098/rspb.2010.1093
关键词
biomechanics; hierarchical material; quasi-self-similar; biomimetic; toughness; flaw tolerance
资金
- A*STAR, Institute of High Performance Computing in Singapore
Load-bearing biological materials such as shell, mineralized tendon and bone exhibit two to seven levels of structural hierarchy based on constituent materials (biominerals and proteins) of relatively poor mechanical properties. A key question that remains unanswered is what determines the number of hierarchical levels in these materials. Here we develop a quasi-self-similar hierarchical model to show that, depending on the mineral content, there exists an optimal level of structural hierarchy for maximal toughness of biocomposites. The predicted optimal levels of hierarchy and cooperative deformation across multiple structural levels are in excellent agreement with experimental observations.
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