Crashworthiness design based on a simplified deceleration pulse

This paper proposes a procedure to improve the design of an automobile crashworthiness using the deceleration pulse in a simplified form as a design variable. A complete vehicle in a full frontal crash was simulated to find its deceleration pulse by finite element method. Based on this deceleration pulse, sled tests were performed, also in a virtual environment. Comparisons between the real deceleration pulse and a simplified pulse were made based on the HIC15 produced. The simplified pulse is developed by dividing the pulse in three phases, each with a constant level of deceleration. Simulations were made to minimize the HIC15 changing parameters in the restraint system and in the deceleration pulse. An expression was found to relate HIC15 and the first phase of the deceleration pulse. A design case using this expression is presented. The benefits of using the pulse as a design variable along with the restraint system are accounted.

[1]  Kazuhiro Obayashi,et al.  Restraint System Optimization for Dual Test Configurations of Frontal Crashes , 2004 .

[2]  Nielen Stander,et al.  Comparing three error criteria for selecting radial basis function network topology , 2009 .

[3]  WJ Willem Witteman,et al.  Improved vehicle crashworthiness design by control of the energy absorption for different collision situations , 1999 .

[4]  Mark F. Horstemeyer,et al.  Crashworthiness Simulations Comparing PAM-CRASH and LS-DYNA , 2004 .

[5]  S. Edward Law,et al.  VEHICLE PULSE SHAPE OPTIMIZATION TO IMPROVE OCCUPANT RESPONSE IN FRONT IMPACT. IN: CAE METHODS FOR VEHICLE CRASHWORTHINESS AND OCCUPANT SAFETY, AND SAFETY-CRITICAL SYSTEMS , 2004 .

[6]  Norman Jones,et al.  Vehicle Crash Mechanics , 2002 .

[7]  I. Eren,et al.  Finite element analysis of collapse of front side rails with new types of crush initiators , 2009 .

[8]  Thomas Vietor,et al.  Automatic concept model generation for optimisation and robust design of passenger cars , 2007, Adv. Eng. Softw..

[9]  Karim Hamza,et al.  Design for vehicle structural crashworthiness via crash mode matching , 2008 .

[10]  Kazuhiro Saitou,et al.  VEHICLE CRASHWORTHINESS DESIGN VIA A SURROGATE MODEL ENSEMBLE AND A CO-EVOLUTIONARY GENETIC ALGORITHM , 2005, DAC 2005.

[11]  Gary R. Consolazio,et al.  Impact simulation and full scale crash testing of a low profile concrete work zone barrier , 2003 .

[12]  John E. Renaud,et al.  Crashworthiness Design Using Topology Optimization , 2009 .

[13]  Ping Zhu,et al.  Lightweight design of automotive front side rails with TWB concept , 2007 .

[14]  Stuart Macey,et al.  H-Point: The Fundamentals of Car Design & Packaging , 2009 .

[15]  Chang Qi,et al.  A Magic Cube Approach for Crashworthiness and Blast Protection Designs of Structural and Material Systems. , 2008 .

[16]  Hequan Wu,et al.  Optimal Design of the S-Rail for Crashworthiness Analysis , 2009, 2009 International Joint Conference on Computational Sciences and Optimization.

[17]  John R. Yannaccone,et al.  Pretensioners and Injury Risk , 2005 .

[18]  Ping Hu,et al.  Magic Cube approach application on crashworthiness design of front rail in front angle impact , 2009, 2009 International Conference on Mechatronics and Automation.

[19]  Chang-Soo Han,et al.  Integrated process for structural-topological configuration design of weight-reduced vehicle components , 2007 .

[20]  Willem Witteman.  Adaptive Frontal Structure Design to Achieve Optimal Deceleration Pulses , 2005 .

[21]  Masoud Rais-Rohani,et al.  A comparative study of metamodeling methods for multiobjective crashworthiness optimization , 2005 .