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MADYMO simulation
(MADYMO stands for MAthematical DYnamic MOdels. It is a software package developed by TNO Automotive Safety Solutions (TASS) of Delft, the Netherlands. It a leading multibody dynamics solver and frequently used for automobile occupant safety/injury calculations for many years.)
This video was taken from a crash simulation program used to analyze the effects of a collision where a car wasn't equipped with airbags and collided with a concrete barrier. The simulation shows the violent effects of the car's impact to a front seat passenger. After the incident the passenger was thought to only have broken a few bones. Unfortunately, severe internal injury to the neck was not discovered until it was too late. If the vehicle had been equipped with airbags these injuries would have been reduced or eliminated by reducing the stress to the body by the seatbelts acting alone.
