对时效状态及－６０℃和－１９６℃低温处理状态的Ｓｉｃ_ｐ／６０６１Ａｌ（ＳｉＣ体积分数为２０％）复合材料中的热残余应力进行了Ｘ射线应力测定及有限元分析．实验与计算结果均表明，随着低温处理温度的下降，复合材料基体相中的平均残余应力由拉应力逐渐变成了压应力，增强相中的平均残余应力由压应力逐渐变成了拉应力．但是，低温处理后材料内部仍然存在着应力梯度和应力集中，基体相中仍然存在着拉应力区．
The residual stresses in 20% SiCp/6061Al (volume fraction)composite after aged and low temperature treatment were deteimined by means of X-ray stress measurement and finite element analysis. The measured and calculated results indicated that with the decrease in treated temperature, the average residual stresses in the matrix changed from tension to compression, and those in the reinforcement from compression to tension. By a suitable choice of the temperature for low temperature treatment,the average residual stresses in the matrix can be completely eliminated. However, the stress gradient and stress concentration still exist in the inner of composite after low temperature treatment.
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | |
| [6] | |
| [7] | |
| [8] | |
| [9] | ArsenaultRJ,WuSB．MaterSciEng,1978 |
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