Optimization of yield criterion and simulation based on QP980 high strength steel

查看全文 作　　者：[1,2]管延智;Li [1,2]Caijun;Wang [1,2]Haibo;Jiang [1]Yuan

机构地区：[1]School of Mechanical and Materials Engineering,North China University of Technology,Beijing 100144,P.R.China;[2]Engineering Research Center of Variable Cross-Section Roll Forming,Beijing 100144,P.R.China

出　　处：《High Technology Letters》索引2020年第26卷第1期,共11页

基　　金：Supported by the National Natural Science Foundation of China(No.51775004);Beijing Natural Science Foundation(No.3164041);Beijing Municipal Education Commission Science and Technology Foundation(No.KM201710009005)。 摘　　要：QP980 is an ultra high strength steel.First,uniaxial and biaxial tension tests have been done in different loading paths.Then QP980 basic mechanical properties have been obtained.And the stress and strain graph has been drawn.Second,according to the equal principle of the unit volume plastics work and yield stress,QP980 plastic work contour map has been drawn.Third,through comparing Mises,Hill'48,Hosford and Barlat89 yield criterion theoretical curves with the experimental plastic work contour map,the result shows that the Hill'48 yield criterion is in good conformity with the QP980 material.Fourth,Hill'48 yield criterion is optimized by introducing an equivalent plastic strain parameter.The result shows that average error of optimized Hill'48 theoretical yield trajectory is reduced by 8.4%.Last,finite element model about variable cross-section roll forming is established,then applying the optimized Hill'48 parameter yield criterion to the ABAQUS for finite element simulation.The simulation result shows that the forming quality is good,and in agreement with the actual forming parts.Therefore,the optimized Hill'48 yield criterion can be used to precisely describe QP980 ultra high strength steel. 关键词：QP980 steel STRESS-STRAIN YIELD CRITERION FINITE ELEMENT simulation

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Optimization of yield criterion and simulation based on QP980 high strength steel

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