PARAMETRIC STUDY AND OPTIMIZATION OF HYBRID CRASHBOX AT AIRCRAFT SUBFLOOR USING DESIGN FOR SIX SIGMA METHOD

• Main Author: Khatami Cholidy, Ahmad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/68453
• Institution: Institut Teknologi Bandung

With the increasing aviation transportation demand, the risk of injuries and fatalities must be decreased. Crash-worthy structures are essential components for protecting passengers in the event of an accident. The structures absorb the impact energy by collapsing and minimizing the energy on passengers. One of the main components of crash-worthy structures is a crashbox. Composite material which is used in aircraft structure becomes one innovation in crashbox technology because of its high specific strength. Hybridize between composite which has good spesific strength and metal which ductile material is expected can generate more energy absorption. This research analyzes the spesific energy absorption of circular hybrid crashbox at aircraft subfloor when receiving dynamic load. The analysis uses finite element method with software LS-DYNA. This research does parametric study of the effect of several parameters to specific energy absorption. After that, optimization was done using design for six sigma method. The result of the simulation shows that the component with the most energy absorption contribution is frame with contribution value 61.82% of total absorption and then crashbox with 21.48% and skin with 10.79%. The result of parametric study shows that significant effect of aluminium thickness and configuration of crashbox on specific energy absorption. The result of optimization shows the crashbox with 1.6 mm aluminium thickness, 8 layers of composite with fiber orientation 0°/±45°, outer aluminium configuration and using no trigger gives the maximum specific energy absorption.