Integrated simplified crash modelling approach dedicated to pre-design stage: evaluation on a front car part. (26th August 2008)

• Record Type: Journal Article
• Authors: Halgrin, J.; Haugou, G.; Markiewicz, E.; Rota, L.
• Is Part Of: International journal of vehicle safety. Volume 3:Number 1(2008)
• Page Start: 91
• Page End: 115
• Publication Date: 2008-08-26
• Subjects: beams -- buckling -- collapse -- crashworthiness -- kinematic modelling -- localisation -- simplified models -- crash modelling -- pre-design stage -- vehicle design -- vehicle safety -- crash optimisation -- plastic deformation -- multibody dynamics -- finite element method -- FEM -- frontal crash -- front car part; Automobiles -- Design and construction -- Periodicals; Automobiles -- Safety measures -- Periodicals; 629.222028905
• Languages: English
• ISSNs: 1479-3105

Abstract

During the pre-design stage, manufacturers in the transportation field need to have access to a simplified simulation and crash optimisation methodology that enables them to quickly ascertain the global behaviour of a structure. The large plastic deformations, localised during the shock, mean that multibody dynamics can be used. They are represented by non-linear spring elements using collapse responses obtained from analytical models in axial compression and pure bending. However, the number and the localisation of these non-linear springs have a direct influence on Central Processing Unit and modelling times and on the quality of results. An automatic method for the localisation and the non-linear response of collapse mechanisms, based on the simultaneous use of analytical results and of a global beam finite element model, is proposed and implemented into a beta version of FE code PAM-CRASH™. To evaluate the robustness of this new tool, an application to a commercial front car part under frontal crash conditions is studied.