en سازه Body structure پژوهشي Research <span style="font-size:11.0pt"><span style="line-height:115%"><span calibri="" style="font-family:">A trapezoidal sandwich panel with a mild steel honeycomb core was modeled under high-velocity impact loading generated by high-energy materials. Numerical simulations were performed at three impact energy levels for five sandwich panel configurations and an equivalent square plate of the same mass, for use in certain special vehicles. The deformation response of the sandwich panels and the equivalent square plate was comparatively evaluated. The results showed that the equivalent square plate exhibits the lowest specific energy absorption and the highest peak transmitted load among all the tested configurations. Panel P3, with approximately 145% higher energy absorption and about 190% lower peak transmitted force compared with the equivalent square plate, was identified as the most efficient design for impact energy dissipation. Therefore, this panel can be proposed as a cost-effective and efficient energy absorber for protecting equipment and occupants in various industrial applications. </span></span></span> Energy absorption, High-velocity impact, Finite element, Honeycomb core, Trapezoidal sandwich panel 5107 5117 http://ase.iust.ac.ir/browse.php?a_code=A-10-912-1&slc_lang=en&sid=1 Mojtaba Pahlavan m_pahlavan@auto.iust.ac.ir 180031947532846005362 180031947532846005362 No School of Automotive Engineering, Vehicle Dynamic Systems Laboratory, Iran University of Science and Technology, 16846-13114, Tehran, Iran Javad Marzbanrad marzban@iust.ac.ir 180031947532846005363 180031947532846005363 Yes School of Automotive Engineering, Vehicle Dynamic Systems Laboratory, Iran University of Science and Technology, 16846-13114, Tehran, Iran