Crack deflection occurs by constrained microcracking in nacre

doi:10.1007/s10409-017-0724-1

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	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)
刊名	ACTA MECHANICA SINICA
	2018-02-01
卷号	34 期号:1 页码:143-150
关键词	Biological mineralized material Nacre Toughening mechanism Three-point bending test Crack deflection Microcracking
ISSN号	0567-7718
DOI	10.1007/s10409-017-0724-1
英文摘要	For 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.
分类号	二类
URL标识	查看原文
WOS关键词	HIERARCHICAL STRUCTURE ; MECHANICAL-BEHAVIOR ; FRACTURE-TOUGHNESS ; CERAMIC COMPOSITES ; NATURAL MATERIALS ; ORGANIC MATRIX ; CORTICAL BONE ; SHELL ; DEFORMATION ; MICROSTRUCTURE
WOS研究方向	Engineering, Mechanical ; Mechanics
语种	英语
WOS记录号	WOS:000426659400012
资助机构	National Natural Science Foundation of China [91216108, 11432014, 11672301, 11372318, 11502273] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB22040501]
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/77875]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, LNM Inst Mech, Beijing 100190, Peoples R China 2.Peking Univ, Dept Mech, Coll Engn, Beijing 100871, Peoples R China
推荐引用方式 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.