圆柱体压缩过程不同有限元软件求解与影响因素分析  

Analysis on different finite element software solutions and influencing factors in cylinder compression process

作　　者：包立 王连刚 梅瑞斌[1,2] 王楷 庞洪轩 Bao Li;Wang Lian′gang;Mei Ruibin;Wang Kai;Pang Hongxuan(State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,China;School of Resources and Materials,Northeastern University at Qinhuangdao,Qinhuangdao 066004,China;Technical Department of Hebei Puyang Iron and Steel Co.,Ltd.,Handan 056305,China)

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819 [2]东北大学秦皇岛分校资源与材料学院,河北秦皇岛066004 [3]河北普阳钢铁集团技术部,河北邯郸056305

出　　处：《锻压技术》2022年第3期227-236,共10页Forging & Stamping Technology

基　　金：河北省自然科学基金钢铁联合基金项目(E2018501016);河北省教育厅精品课程建设项目(2020JPKC061);东北大学秦皇岛分校教改重点项目(2021JG-A03)。

摘　　要：利用ANSYS、MARC、ABAQUS和DEFORM有限元软件及主应力法求解了Fe-6.5%Si钢圆柱体等温压缩过程的力学特征和变形规律。结果表明:DEFORM的计算速度较快,而ANSYS较慢;软件求解的圆柱体压缩变形显著分为难变形区、自由变形区和易变形区;易变形区中心等效塑性应变值最大约为1.4,难变形区中心等效塑性应变值最小,变形区基本为三向压应力状态。4款有限元软件求解的接触面上的压缩方向应力在难变形区相近,在侧面翻平区域略有差异,载荷计算结果的相对误差小于3%,与实测值相比,平均误差小于10%,计算精度较高;主应力法求解接触应力的误差较大,所得载荷相比软件预测值略大10%。网格划分方式和参数设置对计算结果有重要影响,应结合实验结果调整参数设置以提高其求解精度和可靠性。The mechanical characteristics and deformation laws of Fe-6.5%Si steel cylinder during isothermal compression process were solved by FE softwares including ANSYS,MARC,ABAQUS,DEFORM and principal stress method.The results show that the calculation speed of DEFORM is faster,while that of ANSYS is slower.The compressive deformation of cylinder solved by softwares is significantly divided into difficult deformation area,free deformation area and easy deformation area,the maximum equivalent plastic strain value in the center of the easy deformation area is about 1.4,the equivalent plastic strain value in the center of the difficult deformation area is the smallest,and the deformation area is basically in three-dimensional compressive stress state.Moreover,the compressive direction stresses on the contact surface solved by four kinds of different FE softwares are similar in the difficult deformation area and slightly different in the lateral flattening area.The relative error of load calculation result is less than 3%,the average error compared with measured value is less than 10%,and the calculation accuracy is relatively high.However,the error of compressive stress solved by principal stress method is larger,and the obtained load is slightly larger than the software predicted value by 10%.Thus,the meshing method and parameters setting have an important influence on the calculation results,and the parameters setting should be adjusted in combination with the experimental results to improve the accuracy and reliability of the solution.

关 键 词：圆柱体等温压缩 等效塑性应变 主应力法 有限元软件 网格划分 

分 类 号：TG301[金属学及工艺—金属压力加工]