Thesis Type: Postgraduate
Institution Of The Thesis: Bursa Uludağ University, FEN BİLİMLERİ ENSTİTÜSÜ, FEN BİLİMLERİ ENSTİTÜSÜ, Turkey
Approval Date: 2020
Thesis Language: Turkish
Student: TEVFİK CAN ÖZGÜR
Supervisor: Kadir Çavdar
Abstract:In this study; Innovative material and cross-sectional design of crash box and bumper rails used for impact absorption in vehicles and their effect on crashworthiness were investigated. The impact absorber crashboxes located behind the bumper rail have the function of minimizing the transmission of impact to the vehicle chassis. In metal crash boxes, basic objectives such as absorbing the impact by folding deformation or absorption by means of materials placed in the box and increasing the strength in the bumper rail region have been considered. The bumper rails and crash boxes used in vehicles are absorbing components that absorption the impact energy generated in the event of a possible accident and provide less transmission of this effect to the vehicle chassis. Therefore, these parts are critical in the vehicles. Weight reduction studies will be great importance with the developing automotive technology. In this study, different bumper designs will be made, and the optimum two designs will be selected and the structural differences between them will be observed. In the first design, aluminum foam will be used to increase the absorptiongrad in metal crashboxes. T300 carbon fiber material between the bumper rail and the back bumper rail will be investigated in the analysis. In these designs, honeycomb structure test will be applied for crash boxes. The outer side of the crash box will be tested with metal and thermoplastic material of TPU. The effect of TPU thermoplastic material in the analysis will be investigated. The effect of T300 carbon fiber on strength as the design variable in the previous design will be examined. Finite element analysis will be performed to determine the direction in which the honeycomb structure using TPU thermoplastic material absorbs more energy. Verification of virtual analysis with physical tests will be performed.