作　　者： (张文孝）;

机构地区： 大连海洋大学,116023

出　　处： 《内燃机与配件》 2017年第16期30-32,共3页

摘　　要： 运用ANSYS有限元程序计算分析了6S35MC-C型柴油机塞的三维温度场和三维应力应变场,进行了高温低周疲劳裂纹扩展模拟试验,并应用当量J积分方法预测了6S35MC-C型柴油机活塞的剩余疲劳寿命。研究结果表明,活塞材料的高温低周疲劳裂纹扩展速率可由当量J积分范围表征,应用当量J积分方法预测6S35MC-C型柴油机活塞的剩余疲劳寿命是可行的,为柴油机安全设计与合理使用具有参考价值。 Three dimension temperature fields and stress-strain fields of the 6S35MC-C Diesel engine＇s piston were analyzed by means of the program ＂ANSYS＂ and the simulating tests of crack propagation under high temperature low-cycle fatigue were carried out. The residual fatigue life of the 6S35MC-C Diesel engine＇s piston was predicted by using of the equivalent J-integral. The research results show that the crack propagation rate of high temperature low cycle fatigue of piston material can only be characterized by equivalent J-integral range and the quivalent J-integral method can be applied to predicting residual fatigue life of 6S35MC-C Diesel engine＇s piston and it has reference value todesign and reasonable use of Diesel engine.

关 键 词： 活塞 积分 疲劳 裂纹扩展 剩余寿命