NUMERICAL SIMULATION AND STUDY EXPERIMENT OF MECHANICAL PROPERTIES OF ALUMINUM FOAM MATERIALS AT HIGH STRENGTH RATE USING SPLIT-HOPKINSON PRESSURE BAR (SHPB) TECHNIQUE

• Main Author: FADLILAH MUZZAMIL - NIM : 13614015, AHMAD
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/25168
• Institution: Institut Teknologi Bandung

<p align="justify">Aluminum foam is a type of metal material that has a large energy absorption <br /> <br /> <br /> <br /> capability. Several studies had been developed in utilizing the advantages of <br /> <br /> <br /> <br /> Aluminum foam material. Especially research that developed at the ITB Light <br /> <br /> <br /> <br /> Structural Laboratory that applies aluminum foam material in the analysis of <br /> <br /> <br /> <br /> energy absorption in crashboxes and lower floors of armored combat vehicles. One <br /> <br /> <br /> <br /> of the important concerns about aluminum foam in this research is the material <br /> <br /> <br /> <br /> characterization especially at a high strain rate condition. The SHPB technique <br /> <br /> <br /> <br /> was chosen as a method of testing to discover aluminum foam mechanical <br /> <br /> <br /> <br /> properties at high strain rates in this research. This final project focuses on <br /> <br /> <br /> <br /> developing numerical simulation models that approach the results of testing with <br /> <br /> <br /> <br /> the SHPB technique and the study of the effect of strain rate on aluminum foam. <br /> <br /> <br /> <br /> Studies on the design of SHPB tools for soft material testing had carried out to <br /> <br /> <br /> <br /> obtain acceptable testing results. There are two geometry models used in aluminum <br /> <br /> <br /> <br /> foam modeling, namely solid cylinder models and crusifoam models developed by <br /> <br /> <br /> <br /> S. Simosa and T. Wirzbicki, and there are two material models, namely MAT154 <br /> <br /> <br /> <br /> Deshpande Fleck Foam and MAT24 Linear Piecewise Plasticity. After testing and <br /> <br /> <br /> <br /> the stress-strain relationship of aluminum foam has obtained, a numerical model <br /> <br /> <br /> <br /> correlation was performed by fitting a curve for new parameters, in order to obtain <br /> <br /> <br /> <br /> a numerical model that approximates the experimental results. The numerical <br /> <br /> <br /> <br /> models then compared to the experimental result in order to find the best model. <br /> <br /> <br /> <br /> The one with a smaller error compared to the experimental result is the better one. <br /> <br /> <br /> <br /> In this research, the Deshpande Fleck Foam model had a smaller error compared <br /> <br /> <br /> <br /> to other models.<p align="justify">