Concludes from the simulation results obtained with LS-DYNA3D software that the main reason for crackles in the part is the excessive deforming degree at the pre-forming stage.

• 利用LS-DYNA3D软件对一吨车前横梁的冲压成形过程进行了数值模拟；揭示了零件的开裂问题主要是由于零件在预成形阶段变形程度过大造成的.