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.