| 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)
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| Source Publication | ACTA MECHANICA SINICA
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| 2018-02-01 | |
| Volume | 34Issue:1Pages:143-150 |
| ISSN | 0567-7718 |
| Abstract | 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. |
| Keyword | Biological mineralized material Nacre Toughening mechanism Three-point bending test Crack deflection Microcracking |
| DOI | 10.1007/s10409-017-0724-1 |
| URL | 查看原文 |
| Indexed By | SCI ; EI ; CSCD |
| Language | 英语 |
| WOS ID | WOS:000426659400012 |
| WOS Keyword | HIERARCHICAL STRUCTURE ; MECHANICAL-BEHAVIOR ; FRACTURE-TOUGHNESS ; CERAMIC COMPOSITES ; NATURAL MATERIALS ; ORGANIC MATRIX ; CORTICAL BONE ; SHELL ; DEFORMATION ; MICROSTRUCTURE |
| WOS Research Area | Engineering, Mechanical ; Mechanics |
| WOS Subject | Engineering ; Mechanics |
| Funding Organization | National Natural Science Foundation of China [91216108, 11432014, 11672301, 11372318, 11502273] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB22040501] |
| Classification | 二类 |
| Ranking | 1 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/77875 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.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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| IrJ2018262.pdf（3562KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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