高温构件寿命预测的有限元模型  

A FEM Model for Predicting the Life of High Temperature Components

作　　者：凌祥[1] 柳雪华[1] 陈嘉南[1] 沈复中[1] 纪延光[2] 

机构地区：[1]南京化工大学 [2]淮海工学院

出　　处：《压力容器》1996年第5期47-51,共5页Pressure Vessel Technology

基　　金：化工部科技基金

摘　　要：基于损伤力学与有限元法耦合基础上,建立了高温构件寿命预测的有限元模型。在该模型中,考虑了温度对材料性能参数的影响,导出了热弹性蠕变损伤问题的有限元计算公式,给出了失效单元的处理方法,以及迭代过程中自动选取时间步长的控制准则。考题表明:该模型计算结果与解析解吻合。最后以转化炉炉管为实例,对炉管的寿命进行了分析。Based on coupling of FEM (finite element method) with CDM (continuum damage mechanics ) and the material properties changed with temperature components, a new model for predicting the life of high temperature components is proposed. The method to treat a failure element and the rule to identify automatically the time step are given. The test example calculation shows the result by the model is close to analytical result. Finally, the life analysis of reformer furnace tubes is done and the result may be referenced by engineering.

关 键 词：寿命预测 蠕变损伤 有限元法 损伤力学 

分 类 号：O346.5[理学—固体力学]