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Vehicle part closures (such as those of doors, bonnet, trunk lid, and tailgate) are overhang sub-assemblies within the vehicle. The main function of these closures is to secure primary access to the vehicle. In addition, they are often required to accomplish diverse requirements over their complete lifetime.

The door closing is a result of complex interactions between different components of the door design, such as the latch, weather seal, etc. Parameters such as energy loss due to an air-binding effect, the inclination of the hinge axis, check-strap, etc. affect the door closure.

The seal has a major effect on the door closing function. For instance, the initial seal must deform as it engages the body panel to avoid defects such as wrinkles and deformation. Given the complexities, it becomes difficult to model the complete system accurately and simulate the door-closing event. With the existing approach, the time required to perform simulation was higher. Also, accuracy is compromised due to approximations.

The design rationality and manufacturing process play an important role in determining the functionality and performance of the door closing system. At early design stages, it is often difficult to precisely confirm the individual quantitative effect of these variables on the functionality. Therefore, computer-based simulation of the door system is more practical since it can isolate critical factors, in addition to being cost effective and time efficient.

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