关键词: 车门；门碰耐久实验；限位器加强钣；金相切片

Abstract: Car door is one of the most frequently used closures in vehicle, and its opening and closing life is an important evaluation index of vehicle quality. In order to simulate the actual door service life during customer's opening and closing at the project stage, host plants generally use door slamming durability test bench for testing. This paper takes a certain vehicle as an example to analyze and study the the welding spot cracking of the rear door arrester strengthening panel in the door slamming durability test from two aspects. Firstly use Abaqus to calculate the durability life of cracking welding spot and verify the effectiveness of local gluing measure; Secondly control and adjust the welding process and part quality based on the metallographic section of the problem part. In the end the cracking problem of door arrester strengthening panel of the vehicle is solved, which provides valuable experience for the analysis and research of such problems in the future.

Key words: Car door; Door slamming durability test; Door arrester strengthening panel; Metallo- graphic section