摘要
针对螺旋式钢板仓非对称断面钢板成形的工艺特点,基于显式动力学结合工程实际建立两个成形阶段的有限元模型,研究了模拟该产品的能量误差问题。提出了适合于该板料的最佳模拟速率为6 m·s^-1,运用此速率对两模型分别进行模拟,分析了等效应力和等效塑性应变的关键问题,并通过实验样机获取各道次成形的力载荷变化规律,与仿真结果对比分析。结果表明,模拟模型的成形状态比较稳定,相同边弯曲部位的等效应力和等效塑性应变误差较小,体现了有限元模型建立方式的合理性。每道次实验力载荷与模拟中等效应力的变化一致,验证了提出的非对称断面的辊弯成形数值模拟。
Aiming at the technological characteristics of the asymmetric section strip forming of the spiral steel silo,the finite element models of the two forming stages were established combining with engineering practice based on the explicit dynamics,and the energy error problem of the simulated product was studied.It is proposed that the optimum simulation rate for the strip forming is 6 m·s^-1.The two models were simulated respectively using the rate,and the key issues of equivalent stress and equivalent plastic strain were analyzed.The force load variation law of each forming pass was obtained through the experimental prototype,and comparative analysis with simulation results was carried out.The results show that the forming state of the simulation model is relatively stable,the error of the equivalent stress and equivalent plastic strain of the bending part on the same side is small,which reflects the rationality of the establishment method of the finite element model.The changes of force load in each pass are consistent with the equivalent stress in simulation,which validates the proposed numerical simulation of roll forming of asymmetric section.
作者
袁浩
周学渊
操文武
王雷刚
YUAN Hao;ZHOU Xue-yuan;CAo Wen-wu;WANG Lei-gang(School of Mechanical Engineering,Jiangsu University,Zhenjiang 212013,China;JiangSu Hengxin Silo Equipment Co.,LAd.,Changzhou 213351,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2020年第10期147-155,共9页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(51775249)。
关键词
显式动力学
非对称断面
辊弯成形
非线性有限元
explicit dynamics
asymmetric section
roll forming
nonlinear finite element
