相对弯曲半径对冷弯厚壁型钢残余应力的影响

Effect of Relatively Bend Radius on the Cold-formed Residual Stress of the Thick Wall Shaped Steel

运用商用有限元程序建立三维的壳模型模拟板料的成型过程。分析了厚度为10mm,相对弯曲半径r/t分别为1,2,3,4的板料在多次成型后,其截面上各节点的轴向残余应力分布情况;以及成型后的模型弯曲段部分点沿径向的轴向残余应力分布。并且通过对四种模型的比较分析得出相对弯曲半径对冷弯残余应力的影响。进而为材料的稳定性分析提供参考,尽可能地为材料的产业化生产提供工艺优化的理论依据。

Aims to simulate the process of the sheet forming with the 3D-finite shell models established by the commercial codes,the distribution of the axial stresses are analyzed and compared at the end section or along the radius in the bending place of the panels with the thickness of 1 and the relatively bend radius of 1,2,3,4.The effects of relatively bend radius on cold-formed residual stress are obtained by comparing these four models,which provide a reference for the further stability analysis and the theory foundation of the process optimizing for the industrialized producing as far as possible.