循环载荷下缺口板的弹塑性应变分析——塑性各向异性强化理论的应用

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The Elasto-PIastic Strain Analysis of Notched Plate under Cyclic Loading——An Application of Plastic Anisotropic Hardening Theory

摘要: 为了估算承受低周疲劳时工程构件的寿命,需要研究缺口件在低周交变负荷时的应变分布.由于循环载荷作用下材料的鲍兴效应不能忽略,需要应用塑性各向异性强化模型.从本文的计算结果与实验结果的比较可以看出即使是线性随动强化模型对解决循环加载下的应变计算还是很有效的.

Abstract: In order to predict the life of engineering structures, it is necessary to investigate the strain distribution in notched members.In gineral, the Uauschinger Effect of materials under cyclic loading is not negligible, and so the anisolropic hardening model has been suggested.From the comparison between the calculated and experimental results in this paper, we can see that even the linear kinematic hardening model is quite suitable for strain analysis under cyclic loading.

[1]	Axelsson,K.and A.Samuelsson,Finite element analysis of elasto-plastic materials displaying mixed hardening,Inter.J.Num.Meth.Engng.,14(1979) 211-225.
[2]	Zenner,H.,On life prediction in low cyclic-fatigue,Proceedings of the Intenational Symposium on Low-Cyclic Fatigue Strength and Elasto-Plastic Behaviour of Materials(1979).
[3]	Owen,D.R.J.,and E.Hinton,Finite Element in Plasticity:Theory and Practice,Pineridge Press Limited,Swansea,U.K.(1980).