Material response and failure mechanism of unidirectional metal matrix composites under impulsive shear loading
文献类型：期刊论文
| 作者 | Dai LH(戴兰宏) ; Bai YL(白以龙); Lee SWR
|
| 刊名 | Key Engineering Materials
 |
| 出版日期 | 1998 |
| 卷号 | 141-143页码:651-670 |
| ISSN号 | 1013-9826 |
| 通讯作者 | Dai, LH (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100080, Peoples R China. |
| 合作状况 | 国际 |
| 中文摘要 | The material response and failure mechanism of unidirectional metal matrix composite under impulsive shear loading are investigated in this paper. Both experimental and analytical studies were performed. The shear strength of unidirectional C-f/A356.0 composite and A356.0 aluminum alloy at high strain rate were measured with a modified split Hopkinson torsional bar technique. The results indicated that the carbon fibers did not improve the shear strength of aluminum matrix if the fiber orientation aligned with the shear loading axis. The microscopic inspection of the fractured surface showed a multi-scale zigzag feature which implied a complicated shear failure mechanism in the composite. In addition to testing, the micromechanical stress field in the composite was analyzed by the generalized Eshelby equivalent method (GEEM). The influence of cracking in matrix on the micromechanical stress field was investigated as well. The results showed that the stress distribution in the composite is quite nonhomogeneous and very high shear stress concentrations are found in some regions in the matrix. The high shear stress concentration in the matrix induces tensile cracking at 45 degrees to the shear direction. This in turn aggravates the stress concentration at the fiber/matrix interface and finally leads to a catastrophic failure in the composite. From the correlation between the analysis and experimental results, the shear failure mechanism of unidirectional C-f/A356.0 composite can be elucidated qualitatively. |
| 学科主题 | 力学 |
| 类目[WOS] | Materials Science, Multidisciplinary |
| 研究领域[WOS] | Materials Science |
| 关键词[WOS] | SHORT-FIBER COMPOSITES ; STRAIN ; STRESS ; RATES ; EPOXY ; STRENGTH |
| 收录类别 | SCI |
| 原文出处 | http://www.scientific.net/KEM.141-143.651 |
| 语种 | 英语 |
| WOS记录号 | WOS:000071781000029 |
| 公开日期 | 2007-06-15 ; 2007-12-05 ; 2009-06-23 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/15938]  |
| 专题 | 力学研究所_力学所知识产出(1956-2008) |
| 推荐引用方式 GB/T 7714 | Dai LH,Bai YL,Lee SWR. Material response and failure mechanism of unidirectional metal matrix composites under impulsive shear loading[J]. Key Engineering Materials,1998,141-143:651-670. |
| APA | Dai LH,Bai YL,&Lee SWR.(1998).Material response and failure mechanism of unidirectional metal matrix composites under impulsive shear loading.Key Engineering Materials,141-143,651-670. |
| MLA | Dai LH,et al."Material response and failure mechanism of unidirectional metal matrix composites under impulsive shear loading".Key Engineering Materials 141-143(1998):651-670. |
入库方式： OAI收割
来源：力学研究所
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