Crack deflection occurs by constrained microcracking in nacre
文献类型：期刊论文
| 作者 | 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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| 刊名 | ACTA MECHANICA SINICA
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| 出版日期 | 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] |
| 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. |
入库方式： OAI收割
来源：力学研究所
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