DP590钢的力学性能及在车身结构件的应用

Research on the Mechanical Properties of High Strength Steel DP590 and Application in Car Body

为了研究高强度钢DP590的性能及在车身设计中的应用,基于微机控制电子万能试验机,对DP590的材料进行拉伸测试,结果显示材料的屈服强度达到486MPa,抗拉强度达到702MPa。通过建立侧面移动障碍壁碰撞模型,对汽车B柱进行侧面整车碰撞数值模拟,并分析了该成形件在碰撞中的抗撞击性能。重点研究了汽车B柱在碰撞模拟中的动态性能,并对碰撞过程中B柱的应力、塑性应变、速度及弯曲变形进行了详细分析,提出了对车身结构设计时,应整体分析其骨架布局,并对局部零部件的关键部位提出了布置吸能材料,以降低碰撞时产生的峰值应力。

To study material parameters mechanical performance,based on microcomputer control electronic universal testing machine,the material of DP590 tensile was tested,and results show that the material of the yield strength is of 486 MPa,the tensile strength is of 702 MPa. Through the establishment of lateral movement barrier collision model,B pillar numerical simulation for side impact on car was analyzed,B pillar was studied in collision simulation of the dynamic performance,and in the process of collision in B pillar stress,plastic strain,speed and bending deformation were analyzed in detail,and put forward the design of body structure,and it should be the overall analysis of the frame layout,and put forward the key parts to the local parts in arrangement of energy absorption material,in order to reduce the peak stress produced by the collision.