ANALYSIS OF PRE-INVERTED CRASH BOX IMPACT ENERGY ABSOBER

• Main Author: Dani Pratama, Mukhammad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/86135
• Institution: Institut Teknologi Bandung

The increasing population in Indonesia has led to a growing trend of personal vehicle ownership, particularly cars. One consequence of this is an increase in the number of road traffic accidents. A crash box is designed to absorb impact energy during a frontal collision. Among various types of energy absorbers, the pre-inverted crash box module has been chosen due to its relatively stable performance during constant inversion loading and its uniform energy absorption, making it a suitable design for vehicle impact energy absorption. A literature review was used as input data for finite element modeling. Numerical simulations using the finite element method were conducted to obtain the deformation and crashworthiness characteristics of the pre-inverted crash box module. Convergence and validation tests were performed to demonstrate the validity of the simulations. Numerical simulations were conducted for thickness ratio, ????/????, 0.027 to 0.068, and the die radius ratio, ????????/????, 0.081 to 0.135. The parametric study showed that increasing the thickness ratio increases the force response during the inversion and impact loading processes. Decreasing the die radius ratio increases the peak force response during the inversion process but does not have a significant effect on the peak force response during impact loading. As the die radius ratio decreases, the force response during impact loading becomes more gradual. based the parametric study result, a module with a thickness ratio, ????/????=0.15, and a die radius ratio, ????????/????=0.2, potentially provides an optimum energy absorption characteristics.