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Torsional rigidity optimization on tailgate and lift gate of the vehicles
(Bursa Uludağ Üniversitesi, 2020-06-27) Öz, Halil; Bağrıyanık, Ali Ozan; Ünal, Celal Utku; Öztürk, Özgür
The upward tailgate of the vehicles is connected to the vehicle body with hinges and opened with the help of two dampers placed on the fifth doors. Pulling is applied in the corner areas of the tailgate to close the tailgate. During this process, the tailgate tries to stretch from one side. This stretch amount is should meet the torsional stiffness targets set by automotive companies. Torsional stiffness target values are important because proportional to the life of the door. The most impact on torsional rigidity is the door inner sheet thickness and hinge bracket designs. The designs made according to the gap between outer and inner sheet panel, and according to their sections they can be grouped in three different ways; L Design, Z Design and Bridge Type Design. There are torsional stiffness targets within the norms of the companies. These target values may vary even if the vehicle is commercial and passenger. Therefore, Z design can be used on hinge brackets of some vehicles while L design of five doors of some vehicles is used. In this paper, how to design the hinge bracket, which is the most important part of the fifth doors opening condition and the effects of design changes on torsional stiffness values will be examined comparatively.