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Crack deflection occurs by constrained microcracking in nacre
Song JR(宋晶如); Fan CC(范存才); Ma HS(马寒松); Liang LH(梁立红); Wei YG(魏悦广)
Source PublicationACTA MECHANICA SINICA
2018-02-01
Volume34Issue:1Pages:143-150
ISSN0567-7718
AbstractFor decades, nacre has inspired researchers because of its sophisticated hierarchical structure and remarkable mechanical properties, especially its extreme fracture toughness compared with that of its predominant constituent, , in the form of aragonite. Crack deflection has been extensively reported and regarded as the principal toughening mechanism for nacre. In this paper, our attention is focused on crack evolution in nacre under a quasi-static state. We use the notched three-point bending test of dehydrated nacre in situ in a scanning electron microscope (SEM) to monitor the evolution of damage mechanisms ahead of the crack tip. The observations show that the crack deflection actually occurs by constrained microcracking. On the basis of our findings, a crack propagation model is proposed, which will contribute to uncovering the underlying mechanisms of nacre's fracture toughness and its damage evolution. These investigations would be of great value to the design and synthesis of novel biomimetic materials.
KeywordBiological mineralized material Nacre Toughening mechanism Three-point bending test Crack deflection Microcracking
DOI10.1007/s10409-017-0724-1
URL查看原文
Indexed BySCI ; EI ; CSCD
Language英语
WOS IDWOS:000426659400012
WOS KeywordHIERARCHICAL STRUCTURE ; MECHANICAL-BEHAVIOR ; FRACTURE-TOUGHNESS ; CERAMIC COMPOSITES ; NATURAL MATERIALS ; ORGANIC MATRIX ; CORTICAL BONE ; SHELL ; DEFORMATION ; MICROSTRUCTURE
WOS Research AreaEngineering, Mechanical ; Mechanics
WOS SubjectEngineering ; Mechanics
Funding OrganizationNational Natural Science Foundation of China [91216108, 11432014, 11672301, 11372318, 11502273] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB22040501]
Classification二类
Ranking1
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/77875
Collection非线性力学国家重点实验室
Affiliation1.Chinese Acad Sci, LNM Inst Mech, Beijing 100190, Peoples R China
2.Peking Univ, Dept Mech, Coll Engn, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Song JR,Fan CC,Ma HS,et al. Crack deflection occurs by constrained microcracking in nacre[J]. ACTA MECHANICA SINICA,2018,34(1):143-150.
APA 宋晶如,范存才,马寒松,梁立红,&魏悦广.(2018).Crack deflection occurs by constrained microcracking in nacre.ACTA MECHANICA SINICA,34(1),143-150.
MLA 宋晶如,et al."Crack deflection occurs by constrained microcracking in nacre".ACTA MECHANICA SINICA 34.1(2018):143-150.
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