基于Auto Form软件对前罩内板的成形过程进行了数值模拟,研究了板材屈服强度对其成形、减薄率分布、塑性变形量及主次应变的影响。结果表明,随着屈服强度的增加,前罩内板的减薄率、塑性变形量及主次应变逐渐增大,尤其是主应变增大更为明显,导致成形破裂的风险增大。 Based on the Auto Form software, the forming process of the inner panel of the front cover was numerically simulated. The influence of the yield strength of the panel on the forming, thinning rate distribution, plastic deformation and primary and secondary strain was studied. The results show that with the increase of yield strength, the thinning rate, plastic deformation and primary and secondary strains of the inner shell of the front cover increase gradually, especially the principal strain increases more obviously, resulting in an increased risk of forming fractures.