疲劳/蠕变复合作用下聚苯乙烯的时温等效关系

Time-temperature Correspondence Relationship of Polystyrene in Fatigue-creep Co-action

研究了疲劳 /蠕变复合作用下聚苯乙烯的时温效关系。试验条件随加载最大应力、最大应力保持时间和温度而变化 ,但是都得到一致的试验结果 :即随最大应力保持时间的延长或试验温度的升高 ,聚苯乙烯的断裂寿命下降 ;最大应力保持时间t和断裂寿命Nf 的关系曲线与试验温度T和断裂寿命Nf的关系曲线十分相似 ;疲劳 /蠕变复合作用下的聚苯乙烯 。

s The time temperature correspondence relationship of polystyrene in fatigue creep co action was studied Testing conditions were changed with the maximum stress,maximum stress holding time and test temperature,but the testing results always showed no difference:the breaking life of polystyrene shorted with the prolongation of maximum stress holding time or the raise of test temperature The relationship curves of breaking life N f with testing temperature T and the relationship curves of breaking life N f with max stress holding time t were very similar The time temperature correspondence relationship was still suitable for polystyrene in fatigue creep co action