考虑成形与循环滞后的波纹管疲劳寿命研究  

Research on fatigue life of bellows considering forming and cyclic hardening

作　　者：郜慧广 刘静[1] 高亚东 李兰云[1] GAO Hui-guang;LIU Jing;GAO Ya-dong;LI Lan-yun(Xi’an Key Laboratory of High Performance Oil and Gas Field Materials,School of Materials Science and Engineering,Xi’an Shiyou University,Xi’an 710065,China)

机构地区：[1]西安石油大学材料科学与工程学院西安市高性能油气田材料重点实验室,陕西西安710065

出　　处：《重型机械》2023年第1期19-26,共8页Heavy Machinery

基　　金：国家自然科学基金资助项目(51875456);陕西省教育厅科研计划项目(20JC029);西安石油大学研究生创新与实践项目(YCS21112075)。

摘　　要：为提高波纹管疲劳寿命计算精度,建立了一种综合考虑成形影响和材料循环特性的波纹管疲劳寿命计算有限元模型。基于ABAQUS平台计算获得了波纹管成形后的实际轮廓和壁厚,利用FE-safe软件提取了材料稳态循环滞后应力应变曲线,计算出波纹管疲劳寿命,并与理论计算值、理想模型结果和实验结果进行了对比。结果表明:考虑成形与循环滞后影响的波纹管疲劳寿命仿真模型可以有效提高计算精度,其与实验结果误差在12%以内;理想模型误差范围为14%~62%;理论计算值结果误差最大。In order to improve the calculation accuracy of bellows fatigue life,a new FE model is developed with considering the deformation of bellows in hydroforming and the material cycle characteristics.The actual contour and wall thickness of bellows after forming are calculated based on ABAQUS platform.The material cycle lag stress-strain curve is extracted by FE-safe software.The strength of bellow is analyzed,and then the fatigue life is calculated based on the results of strength analysis.The simulated results are compared with the ones calculated by EJMA,simulation value of the theoretical model and experimental values.The experimental results show that the model is reliable to predict the fatigue life with a maximum relative error of 12%.The theoretical model error range is 14%~62%;the theoretical calculation result has the largest error.

关 键 词：波纹管 疲劳寿命 液压成形 循环滞后环 

分 类 号：TH131[机械工程—机械制造及自动化] O346.2[理学—固体力学]