基于曲率积分法考虑包辛格效应的辊式矫直交变弯曲研究  

Study on alternating bending considering Bauschinger effect based on curvature integration method

作　　者：马晓彬 张杰[1] 李洪波[1] 胡伟东 周一中 张中伟 MA Xiao-bin;ZHANG Jie;LI Hong-bo;HU Wei-dong;ZHOU YI-zhong;ZHANG Zhong-wei(School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China;Baosteel Wuhan Iron & Steel Co.,Ltd.,Wuhan 430083,China)

机构地区：[1]北京科技大学机械工程学院,北京100083 [2]宝钢股份武汉钢铁有限公司,湖北武汉430083

出　　处：《塑性工程学报》2018年第6期118-124,共7页Journal of Plasticity Engineering

基　　金：国家十二五科技支撑计划项目(2015BAF30B01)

摘　　要：通过建立高强钢板考虑包辛格效应的本构模型,分析了其在矫直过程中的截面弯曲特性,得到了高强钢板在矫直过程中任意道次的弯矩一曲率关系。对矫直区间内板材按照曲率差值等分离散,根据该区间的弯矩一曲率关系求解曲率变化量的积分值,建立考虑包辛格效应的曲率积分解析模型。使用该模型解析交变三点弯曲过程,得到采用不同本构模型的仿真数据,并将仿真数据与三点弯曲试验数据对比。结果表明:受包辛格效应影响的板材在交变弯曲的过程中,由于截面发生弹塑性弯曲,使得板材截面的弯曲特性发生变化,对板材后续弯曲过程产生一定影响;建立辊式矫直过程曲率积分解析模型时充分考虑包辛格效应对材料后继屈服过程应力应变关系的影响可以保证模型的准确性。Constitutive model of high strength steel plate considering Bauschinger effect was established and section bending properties of the plate during leveling were analyzed,then,moment-curvature relationship of plate under arbitrary leveling pass was obtained.The integral value of the curvature change of the plate in leveling region was solved by discrete curvature according to the equally curvature difference and the moment-curvature relationship of this region.Then curvature integration analytical model considering Bauschinger effect was constructed.Alternating three points bending process was analyzed,simulation data of different constitutive models was got and compared with the test data.Results show that the bending properties of plate influenced by Bauschinger effect are changed during alternating bending due to the elastic-plastic bending in the section,which has certain influence on the subsequent bending process.Fully considering the influence of Bauschinger effect on stress strain relationship in subsequent yield process when set up the curvature integration model can guarantee the accuracy of the model.

关 键 词：辊式矫直 曲率积分法 包辛格效应 交变弯曲 

分 类 号：TG333.2[金属学及工艺—金属压力加工]