Spare tire is a simple part in our car, it is small yet very useful. Imagine you could not have your tire changed as you need it. As the picture shown, the spare tire has vertical up-down mechanism that attached to chains. We modeled how tire can be lifted at certain torque that usually human can generated. On the other hand, how the chain has possibility to came off as above picture told. We did the explicit dynamic non-linear analysis to made it happened.
We did another objective on this simulation, as chain move and rotating on shaft, the lower part of spare tire assembly must be set to ensure chain move smoothly. Indirect movement of chain is not wanted, so at certain velocity and torque we give, chain should move accordingly into the track designed.