حسين فخري وايقان

This study, introduces a rectangular thin-walled tube with an internal ovoid lattice structure made of stainless steel. The functionality of the structure's crash capability has been examined in the context of railway applications. The crash capability of the aforementioned structure was simulated using LS-DYNA commercial software and an explicit finite element code under a variety of loading scenarios, including axial, offset, and oblique loading. To validate the results, a thin rectangular wall with an diaphragm to eva‎luate the accuracy of the results. The results demonstrate that the adsorbent exhibits enhanced energy absorption capabilities. The integration of the network structure into the absorber configuration resulted in a notable enhancement in energy absorption, with an increase of 36.24% and 11.94% in energy and specific energy absorption, respectively. Furthermore, a notable enhancement of 25.91% in crushing force efficiency was observed, indicating a more balanced distribution of force with a smoother curve due to a higher average force than a maximum force. Furthermore, the absorber demonstrates stable crushing behavior up to 40 mm under offset loading and 15 degrees under inclined loading, maintaining a constant level of energy absorption. Two mesh structures inspired by nature are then introduced for eva‎luation of their crashworthiness. The results indicate that the presented mesh structures exhibit an acceptable level of performance in the field of accident capability.

قابليت تصادف , ساختار مشبك , جداره نازك مستطيلي , بارگذاري مايل

crashworthiness , Lattice structure , rectangular Thin-walled tube , oblique loading

Hossein Fakhri

Dr. Parisa Hosseini Tehrani