| EFFECT OF SPECIMEN ASPECT RATIO ON FATIGUE LIFE OF CLOSED CELL Al-Si-Ca ALLOY FOAM |
| |
| 作者单位： | Division of Mechanical and Automotive Engineering，Kongju National University，275，Budae-dong，Cheonan，Chungnam 330-717，Korea |
| |
| 基金项目： | Project supported by Chungnam Automotive Technology Education Center （NURI） and BK 21 |
| |
| 摘 要： | Quasi-static and compressive fatigue tests on the closed cell Al-Si-Ca alloy foam specimens with three different aspect ratios were performed. It turned out that the onset of cyclic shortening of foam with a lower aspect ratio took place earlier and the fatigue strength was lower compared with the specimen with a higher aspect ratio, although all the dimensions of specimen satisfied the seven times the cell size criterion, while the quasi-static stress-strain curves were almost same having same Young＇s modulus, yield stress and plateau stress. Therefore, the seven times the cell size criterion for the quasi-static compression behavior was not applicable to the fatigue analysis of Al-Si-Ca alloy foam.
|
| 关 键 词： | 铝泡沫 纵横比 疲劳理论 耐压强度 |
| 收稿时间： | 24 June 2008 |
EFFECT OF SPECIMEN ASPECT RATIO ON FATIGUE LIFE OF CLOSED CELL Al-Si-Ca ALLOY FOAM |
| |
| Authors: | Amkee Kim Ilhyun Kim |
| |
| Institution: | Division of Mechanical and Automotive Engineering, Kongju National University, 275, Budae-dong, Cheonan, Chungnam 330-717, Korea |
| |
| Abstract: | Quasi-static and compressive fatigue tests on the closed cell Al-Si-Ca alloy foam specimens with three different aspect ratios were performed.It turned out that the onset of cyclic shortening of foam with a lower aspect ratio took place earlier and the fatigue strength was lower compared with the specimen with a higher aspect ratio,although all the dimensions of specimen satisfied the seven times the cell size criterion,while the quasi-static stress-strain curves were almost same having same Young's modulus,yield stress and plateau stress.Therefore,the seven times the cell size criterion for the quasi-static compression behavior was not applicable to the fatigue analysis of Al-Si-Ca alloy foam. |
| |
| Keywords: | aluminum foam aspect ratio fatigue behavior compressive strength |
| 本文献已被 CNKI 维普 万方数据 ScienceDirect 等数据库收录！ |
