期刊
EXTREME MECHANICS LETTERS
卷 40, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.eml.2020.100890
关键词
Fracture resistance; Nacre-like composites; Structural optimization; Phase field modeling; Crack propagation; Soft materials
资金
- NSF, USA [1561917]
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1561917] Funding Source: National Science Foundation
Most biological composites including bones, teeth and nacres have superior fracture resistance properties than that of their constituents. Their complex mixing of stiff and soft constituents enables energy dissipation ahead of the crack tip and contributes to enhance the fracture performance. In this study, phase-field based modeling is used to understand the fracture resistance of bio-inspired designs. Phase-field based topology optimization is then proposed to further improve the fracture resistance of these composite structures. The fracture process from damage to multiple crack propagation and ultimately to failure is fully studied. Numerical experiments show that significant enhancement of the fracture toughness, failure strain and overall strength can be achieved over the homogeneous constitutive stiff material. (C) 2020 Elsevier Ltd. All rights reserved.
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