Frontal impact absorbing systems in wheelchairs like sheet metal hood in vehicles

► Frontal impact procedures were revealed by LSDYNA. ► Analyses were processed and compared with unloaded and loaded chassis. ► Chassis was strengthened by adding cross members and w shaped sheet metal shock absorbers. ► UHM carbon fiber, aluminum alloy and A1010 carbon steel materials were used. ► Wheelchair made of A1010 carbon steel has better absorbing ability than the other materials.