NUMERICAL AND EXPERIMENTAL ANALYSIS OF DOUBLE-HAT MULTI-CORNER CRASH BOX SUBJECTED TO AXIAL IMPACT FORCE

• Main Author: Adi Kusnanda, Muhammad
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/47344
• Institution: Institut Teknologi Bandung

The number of vehicles in Indonesia is increasing every year. Therefore, the possibility of accidents also increases. Based on data reported by Badan Pusat Statistik, from 2007-2016 the number of accidents increased by around 120%. To reduce the risk of impact, a structure is designed to absorb kinetic energy when impact occurs. This can minimize injury to passenger. The structure normally used to absorb this energy is known as crash box. The focus of this research is numerical and experimental analysis of double-hat multi-corner crash box subjected to axial impact force. Initially, a formation simulation will be carried out using Hyperform to obtain a model that has a distributed residual stress and residual strain. Then, this model is used as input to the axial impact numerical simulation in LS-DYNA software. The structure of the crash box analyzed is a multi-corner double-hat column structure with a total number of angles of 16, with cross-sectional dimensions (60 mm x 60 mm), column length of 170 mm, and variation in wall thickness of 1 mm and 0.8 mm. The displacement and energy obtained in the numerical simulation are 94.26 mm and 4672.20 J for the 1 mm and 88.71 mm crash boxes and 3129.14 J for the 0.8 mm crash box. The displacement and energy absorbed in the test are 81.78 mm and 4225.73 J for the 1 mm and 97.82 mm crash boxes and 2952.14 J for the 0.8 mm crash box