چكيده به لاتين
Today, according to statistics, ninety percent of accidents occur lateraly, so due to the importance of the subject in this study, first the experimental analysis of thin-walled energy absorber with a circular cross-section under lateral compressive load has been done quasi-statically, the main purpose of these experiments is to find The general deformation, the local plastic collapse and the force-displacement diagram of energy absorbers structure. Then numerical analysis was performed according to the test conditions using Abacus software. Finite element simulation results were analyzed to study energy absorption; Then, numerical analysis were designed to reduce the weight of the adsorbent and the least change in energy absorption by Abacus software. energy absorption behavior and maximum force and force-displacement diagrams were presented and the optimal sample was proposed using TOPSIS method. Defects were considered and analyzed on the selected sample. The results show that the maximum force decreases with increasing hole diameter; Also, by examining the series of samples A, B and C, indicate that increasing the number of holes parameter does not necessarily reduce energy absorption. Finally, by comparing all the samples, it was found that the most optimal state, ie the most weight loss and the least change in energy absorption occurs in sample A6-6.
