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Title: Crack-induced stress conentration is suppressed in nacreous composites
Authors: Yao, HM 
Keywords: Bio-inspired mechanics
Flaw insensitivity
Strengthening and toughening
Issue Date: 2015
Publisher: Trans Tech Publications Ltd
Source: Materials science forum, 2015, v. 813, p. 323-336 How to cite?
Journal: Materials science forum 
Abstract: Linear elastic fracture mechanics (LEFM) indicates that crack-like flaws tend to intensify stress in brittle materials with stress intensity proportional to the square root of the crack size. Under given loading, monolithic brittle materials can only endure cracks smaller than a critical size. In this paper, however, our exploration into the stress state of nacreous composites shows that the crack-induced stress intensification/concentration and its dependence on crack size can be suppressed in composites with ‘brick-and-mortar’ structure. This feature can be attributed to the unique ‘brick-and-mortar’ (B-and-M) structure and the complementary dissimilarity between ‘brick’ (e.g. minerals) and ‘mortar’ (e.g. proteins) phases in mechanical properties. Our findings provide a profound insight into the origin of high strength and high toughness in nacreous composites.
Description: 1st International Conference on Advanced Composites for Marine Engineering, ICACME 2013, 10-12 September 2013
ISBN: 978-3038354062
ISSN: 0255-5476
EISSN: 1662-9752
DOI: 10.4028/
Appears in Collections:Conference Paper

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