Structure optimization of door-beam base on strength of side doors

Side doors are important parts of a vehicle, whose strength has big influence for the structure of the car and hence the safety of the passengers. Chinese National Regulation (GB15743-1995) has clear requirements for car doors and their testing processes. In this paper, we analyze the characteristic structure of the car door and study specifically on the structure of door beam and its influence for door strength. A finite element model of vehicle for door impact is created. We analyze the result by LS-DYNA software and validate the efficiency of this model through door impact test. The result shows that the initial crush resistance is less than the value required by national regulation. Through optimization of the cross structure of the door beam, the strength of side door is improved, and the result satisfies the requirement of the regulation.