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International Journal of Automotive Technology > Volume 22(5); 2021 > Article
International Journal of Automotive Technology 2021;22(5): 1201-1213.
A PRACTICAL AXIAL CRUSH SIMULATION OF GLASS-FIBER MAT/PA6 COMPOSITE TUBES FOR APPLICATION OF AN ENERGY ABSORBER IN AUTOMOBILES
Geunsu Joo1, Jinbong Kim1, Mungyu Jeong1, Youngchul Kim1, Holger Böhm2, Jonas Richter2
1Korea Institute of Materials Science
2Institut für Leichtbau und Kunststofftechnik (ILK)
PDF Links Corresponding Author.  Jinbong Kim , Email. jbkim@kims.re.kr
ABSTRACT
This paper is concerned with numerical simulation utilizing LS-DYNA MAT54 for axial crush of glass-fiber mat/PA6 composite tubes. The crush simulation aims at reproducing the crush energy absorption capability measured from dynamic drop tests. The adopted MAT54 has a merit as a widely commercialized model of composite materials to simulate a progressive failure mode. Parameters of MAT54 are calibrated to reduce difference of the crush energy absorption capability between experiment and simulation on the basis of parametric studies. The calibration is performed for major parameters considering effect of energy absorption and stability of crush simulation first, and other parameters are determined by a trial and error method. In order to evaluate the calibrated parameters of MAT54, results are compared for specific energy absorption and crush depths measured from simulation and experiment. Consequently, the presented simulation shows good agreements with experiments, and its applicability is verified under various impact speed and impactor mass conditions.
Key Words: Crush simulation, Thermoplastic composite tube, Energy absorption capability, LS-DYNA MAT54, Parameter calibration
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