A design methodology for space frame through parametric study of torsional stiffness

Abstract

Torsional stiffness comes as a priority in chassis design as it greatly affects its dynamics. According to the literature survey done in this research, it shows that the design methodology of tubular space frame was not performed explicitly, so there is a great need to fill this gap. Therefore, this research aims to develop a methodology for designing tubular space frame of vehicles and in other applications. A finite element model was made to evaluate torsional stiffness of vehicle frame then the model results were validated with experimental data obtained from a previous experiment. A parametric study was conducted using this model to investigate the impact of varying tube cross sections, length ratio, triangulation, intermediate sections and materials on both frame stiffness and frame stiffness to weight ratio. From this study, several guidelines for designing tubular space frame were concluded and a design methodology for tubular space frame was deduced.