Considerations of the reliability of tensile strength at elevated temperature of unidirectional metal matrix composites
Considerations of the reliability of tensile strength at elevated temperature of unidirectional metal matrix composites
复制标题
单向金属基复合材料高温拉伸强度可靠性的思考
DOI：
10.1016/0266-3538(89)90094-8
复制
发表时间：
1989
影响因子：
9.1
通讯作者：
H. Fukunaga
中科院分区：
文献类型：
--
作者：
K. Goda;H. Fukunaga
众所周知，单向金属基复合材料在高温下的抗拉强度比室温下有所下降。为了阐明这种影响，采用基于剪切滞后模型的有限差分法对单向金属基复合材料的拉伸断裂进行了蒙特卡罗模拟。假设增强陶瓷纤维不发生降解，只有基体金属的剪切屈服应力随温度变化。结果表明：复合材料的平均强度随温度的升高略有下降，且变异性增大；基于Harlow和Phoenix提出的束链概率模型的递归分析技术也发现了这种趋势。
It is well known that the tensile strength of unidirectional metal matrix composites is somewhat decreased at elevated temperatures compared with that at room temperature. In order to elucidate this effect, a Monte-Carlo simulation has been carried out on the tensile fracture of unifirectional metal matrix composites by the use of a finite difference method based on the shearlag model. It was assumed that no reinforcing ceramic fibers were degraded, and only the shear yield stress of the matrix metal changed with temperature. The results showed that the average strength of the composites decreased slightly with temperature, and the variability increased. Such tendencies were also found by the recursion analysis technique based on the chain-of-bundle probability model proposed by Harlow and Phoenix.