Multi Objective Knowledgebase Concept Design Methodology of Automotive Space Frame Structures for Crashworthiness by Numerical Methods

Abstract

Crashworthiness of an automotive can be well-defined as its capability to defend its occupants and other accomplices, like pedestrians and other automobiles, complicated in an incident of impact. The multi objective knowledgebase methodology facilitates the performance oriented design of a crashworthy profile based car body structure with regular cross-sections in its concept design stage.Crashworthy design of a car body is realised by designing its components to absorb sufficient amount of energy in an event of impact, so that the integrity of the passenger compartment is maintained. The multi objectiveknowledgebase aims at pre-defining the targets for the structural performance of these car body components during a crash scenario, and choosing appropriate cross-sectional geometry and materials for these components, matching the targets. In this work, information extracted from FE simulations of full vehicles and profiles with regular cross sections is extensively used for developing this knowledgebase. Due to the performance oriented design concept employed here, the optimisation time required during the detailed design phase can be considerably reduced.