NUMERICAL STUDY OF CRASH BOX UNDER IMPACT LOADING TO ABSORB ENERGY OF COLLISION FOR VEHICLE USING MSC DYTRAN SOFTWARE

Abdel, Aziz (2022) NUMERICAL STUDY OF CRASH BOX UNDER IMPACT LOADING TO ABSORB ENERGY OF COLLISION FOR VEHICLE USING MSC DYTRAN SOFTWARE. Diploma thesis, Universitas Andalas.

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Abstract

Based on WHO data, one of the biggest contributors to the death number is traffic accidents. For reducing this number, vehicle safety was created, such as seatbelts, antilock braking systems, airbags, crash box. A crash box is a thin-walled structure that is useful for absorbing collision energy. The magnitude of the energy absorption is affected by the material, load and geometry. Many kinds of research on Crash Box aims to determine the best model for the greatest energy absorption. This final project discusses the trigger effect and velocity on energy absorption by the crash box. The crash box models are straight beam and S-beam. The trigger models of the straight beam crash box are the non-trigger, 2-folds, 2- hole, 5-folds and 5-hole, while the s-beam trigger models are the non-trigger, v trigger and cross-section trigger. The velocity variations given are 0.2 m/s, 0.02 m/s and 0.002 m/s. The analysis of the crash box uses a finite element model where MSC Patran and MSC Dytran conduct the modelling and analysis. From the analysis that has been carried out, the results of the crash box models are efficient in energy absorption. The best trigger model for the straight beam is the 2-fold trigger model with energy absorption 4165.32 J. The s-beam crash box trigger model is the best trigger V model with energy absorption 23756.80 J. The results of the velocity variations analysis are also obtained the amount of energy absorbed by the crash box has no significant difference for each velocity variation.

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