基于ANSYSLS-DYNA的板材成型压制分析

基于ANSYSLS-DYNA的板材成型压制分析摘要：本文应用三维非线性有限元分析技术，利用ANSYS软件的LS-DYNA模块动态模拟了板材成型的整个过程，得到了各场量的分布，进而分析了产生横裂、纵裂等实际问题的机理，根据压制力制力的变化规律，将压制过程分为起始、流动、稳定三个阶段，并得出了工艺参数（模锥角、摩擦系数、壁厚）与压制力的关系，为优化模具结构和进行压制板材工艺设计提供了依据。关键词：ANSYS/LS-DYNA；压制板材；有限元；压制力；1.基于Pro/ENGINEER三维模型设计 冲模 板材 模型2导入ansys进行有限元分析2.1以igs格式导入ansys 2.2 单元属性的定义包括单元类型（TYPE）、实常数（REAL）和材料模型（MAT），利用ANSYS前处理器选用具有显式分析功能的Shell 163单元对实体模型划分网格，模具和模具就可以分别用PART1、PART2、PART3标识以进行接触分析，接触边界通过设置接触类型和摩擦系数靠PART1、PART2和PART2、PART3自动识别。分网后板材和模具的有限元模型如以下两图所示。加载荷：参数表时间位移000.006-0.0010.007-0.0020.009-0.0040.010-0.005应力图：单元应力图：结果动画演示：donghua1.avidonghua2.avidonghua3.avi3 结论 本文应用ANSYS软件的LS-DYNA模块建立了三维板材有限元模型，动态模拟了板材压制过程，得到了各种场量的分布，分析了生产中常见问题的成因，如横裂及空拔后钢管出口直径略小于模孔直径的机理，研究了模锥角、摩擦系数和壁厚等工艺参数对压制力的影响。为模具结构设计、生产线功率计算提供了较为可靠的理论依据。 参考文献：1王同海.管材塑性加工技术M.北京:机械工业出版社,1998.2杨合,林艳,孙志超.面向21世纪的先进塑性加工技术与管成形研究发展M.中国科学协会第二届学术年会文集.北京:科学技术出版社,2000:745746.3彭志辉,甘卫平.汽车工业用铝材的开发与应用J.汽车工艺与材料,1999,(4):16.4Frank Vollertsen,Axel Sprenger,J urgen Krraus,et al.Extrusion,channnel,and profile bending:a review.Journal of Materials Processing Technology,1997,87:127.5王志强,刘晓飞.管和板的热应力弯曲工艺J.塑性工程学报,2000,7(2):5557.6Reigl M,Lippmann H,Mannl V.Air bending as a numericaly controlled forming process to produce S2shaped barsJ. Journal of Materials Processing Technology,1994(45):389394.7Murata M,Yamnamnoto S,Suzuki H.Development of new flexible bending CNC machine for circular tubeJ.Advanced Technology of Plasticity,1993(1):435440.8Kleiner M,Arendes D.The manufacture of non-linear aluminum sections applying a combination of extrusion and curvingJ.Advanced Technology of Plasticity,1996:971983.9Nakamura M,Maki S,Nakajima M et al.Bending of circular pipe using a floating spherical expanding plugJ.Advanced Technology of Plasticity,1996:501-504.10鹿晓阳,徐秉业等.牛角芯棒热推弯管成形过程力学原理及分析求解方法J.塑性工程学报,1999(9):31-36.11胡勇,王呈方.弯管工艺中回弹、伸长和成形半径的确定方法J.锻压机械,1997(1):35-37.12J unichi Endow,Tadao Murota.On the Flanening of Crossion-ection of Circular Tubes in Uniform BendingJ.Advanced Technology of Poasticity,1984(1):2852290.1997,15(3):3602364.14胡忠.中频感应局部加热弯管回弹的研究J.应用力学学报,1996(6):81-88.15Yokoushi Y.Prediction of deformed cross section in pure bndingJ.Advanced Technology of Plasticity,1996:599-602.16Forde Paulsen,Torgeir Welo.Application of numerical simulation in the bending of aluminium2alloy profilesJ.Journal of Materials Processing Technology,l996,58:274-285.17胡福泰.异型管材与型材无模弯曲工艺理论及实验研究:博士学位论文D.齐齐哈尔:东北重型机械学院,1995.18Abdelmajid Fantnassi,Yoshihiro Tomita,Akio Shindo.Theoretical Investigation of Buckling Behavior of Axisymmetric Elastic2Plastic Membrme Shells Subjected to Axisymmetc FormingJ.Advanced Technology of Plasticity,1984,(1):611-616. 20Lin Yan,Yang He.Thin2walled tube precision bending process and FEM simulation.In:Yang Huayong,Li Wei,Proceedings of the 4thInternational Conference on Frontiersof Design and Manufacmring.Beijing:Intemational Academic Publishers,2000:3052308.21Jae2bongYang,Byung2hee J