江淮SRV前梁液压胀形过程有限元分析

对江淮SRV前梁液压胀形过程进行了数值模拟研究,应用弹塑性有限元动力显式分析程序LS-DY-NA进行求解分析.重点针对管坯初始尺寸的确定和内压加载路径的选择,给出了模拟结果.分析表明选择合适的管径和内压加载路径能改善成形过程中材料的流动、提高材料的成形极限、有利于产品质量的提高,模拟结果为工程应用提供了依据.

Numerical simulation of hydroforming automotive front transom

To achieve weight reducing, strength increasing and stiffness improving, tube hydroforming is now widely used in auto industry. In this paper, the hydroforming process for automobile front transom is analyzed by LSDYNA program, which is developed on the basis of elastic-plastic finite element method. The effect of forming process parameters, such as internal pressure loading path and initial tube size are simulated and discussed. The comparison shows that the suitable initial tube size and loading path can observably improve the distribution of the thickness and forming limit of the tube. The FEA results can predict the deformation successfully.