Abstract
This research aims at developing a reliable finite element framework to investigate the specific energy absorption of a rear crash attenuator of an open-wheel-type IndyCar vehicle. The failure behavior was learnt based on various nonlinear finite element modeling techniques to simulate a crash as per regulations from the governing body of IndyCar, utilizing the continuum damage mechanics model. The sandwich structure material characterization for the tuning of the material model was done by the means of a correlation with experimental data and adjusting the non-physical input parameters in the software. Post-calibration, the development of the rear impact attenuator was performed with a finite element model. The failure modes were investigated for head-on and oblique impact angles. The specific energy absorption was determined for these configurations of impact by evaluating the force over the crushed displacement. The insights from the simulation were utilized to improve the overall specific energy absorption by 41.8% with a gradual deceleration value to that of the prescribed. Finally, the results were compared to the previous IndyCar structure and a new prototype was suggested with highlights of the refreshed results.
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