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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)
2018-02-01
发表期刊ACTA MECHANICA SINICA
卷号34期号:1页码:143-150
ISSN0567-7718
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.
关键词Biological mineralized material Nacre Toughening mechanism Three-point bending test Crack deflection Microcracking
DOI10.1007/s10409-017-0724-1
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收录类别SCI ; EI
语种英语
WOS记录号WOS:000426659400012
关键词[WOS]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
WOS类目Engineering ; Mechanics
项目资助者National Natural Science Foundation of China [91216108, 11432014, 11672301, 11372318, 11502273] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB22040501]
论文分区二类
力学所作者排名1
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被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77875
专题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
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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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