ANALYSIS OF AXIAL CRUSHING ON THE FOAM-FILLED THIN-WALLED COLUMN WITH STRAIN RATE CONSIDERATION

• Main Author: Oktavia Kurniati , Eka
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/21896
• Institution: Institut Teknologi Bandung

Traffic accidents are problem which need more attention. Many of accidents are occured on cars. Frontal collisions are dominating the number of car accidents occurred. Therefore, protection systems on cars are needed for frontal collision energy absorption to ensure the safety of passenger cabin during collision. One of energy absorption systems is crash box. Crash box is going to absorb the collision energy through deformation process as sequentially plastic foldings called progressive buckling. On crash box, there are evaluation parameters which can be analyzed through deformation behaviour. On this thesis, analysis of axial crushing on foam-filled thin-walled column was done. Column configurations which were analyzed are single-walled foam-filled dan double-walled foam-filled. Numerical analysis on this problem was compared with experimental result. Influence of aluminum foam adding was also analyzed. For double-walled foam-filled configuration, analysis on foam thickness variation was done to determine optimum foam thickness. Then, aluminum foam modelling by meso-modelling was done to observe strain rate effect. Based on numerical analysis, finite element modelling on this thesis was good agreement with eksperimental analysis. Foam adding on column could increase mean crushing force. By foam thickness increasing on double-walled foam-filled, mean crushing force would increase and at the one value of thickness, mean crushing force would decrease again. For aluminum foam modelling by meso-modelling, strain rate effect has been observed by stres-strain curve and deformation mode on the foam. <br />