金属基复合材料热应力疲劳寿命预测  

PREDICTION OF THE THERMOMECHANICAL FATIGUE LIFE OF METAL MATRIX COMPOSITES

作　　者：廖力[1] 吴效白 胡更开[1] 

机构地区：[1]北京理工大学应用力学系,北京100081

出　　处：《兵工学报》2000年第z1期59-61,共3页Acta Armamentarii

摘　　要：根据基体材料的机械疲劳、蠕变、氧化损伤寿命预测模型 ,用细观力学弹性约束法研究了 Al2 xxx- T4基体、Si C增强金属基复合材料在几种不同形式的同相热应力循环载荷作用下的热应力疲劳寿命。结果表明 :在给定应变范围和温度变化范围的条件下 ,该金属基复合材料热应力疲劳寿命随增强物体积百分比的增加。Based on the fatigue life prediction model and considering mechanical fatigue, creep and oxidation damage of matrix, the thermomechanical fatigue life of SiC reinforced Al 2xxx T4 composites, under the simultaneous action of several in phase, thermomechanical fatigue loads has been studied applying the elastic restraint method of micromechanics Within a given range of strains and temperature variation, it predicts a decrease in fatigue life, with the increase in the volumtric fraction of reinforcement and the stagnant time of thermomechanical loading and with the decrease of strain rate

关 键 词：热应力疲劳 金属基复合材料 弹性约束法 

分 类 号：O346.2[理学—固体力学]