低周疲劳/蠕变交互作用下构件的寿命预测

LIFE PREDICTION OF A MEMBER UNDER LOW-CYCLE FATIGUE CREEP INTERACTION

通过寿命预测与试验研究 ,对材料性能到构件的特异性、循环蠕变的分析和平均应力的影响 ,提出了处理的办法。对交互作用规律进行了深入的分析 ,提出了预测寿命的途径。

A structural member model under low cycle fatigue creep interaction has been investigated experimentally and its life predicted with the help of several available methods.On the basis of the comparison between the expermental data and the prediction results,an approach is provided to analyze the cycle creep and influence of average stress according to difference between the properties of the material and the member.The rule of the low cycle fatigue creep interaction has been researched thoroughly.Finally,a better approach of life prediction is proposed.