Browse Publications Technical Papers 2019-26-0273

Automotive Door Opening Durability Simulation Using Detailed Checkstrap Mechanism 2019-26-0273

In automotive industry, door opening durability is one of the important design attributes in overall vehicle design space. Customer interact with door very often while opening or closing of the door and that builds perception of a vehicle in customer’s mind. Now days, Computer Aided Engineering (CAE) is used extensively to simulate the real time door opening and closing event for designing the door system for durability performance. Early prediction of real durability issue and evaluation of different design proposals to improve the door durability performance saves great amount of time and cost. This paper provides a brief study of detail checkstrap mechanism that helps in simulating the door-opening event more precisely. Door checkstrap plays an important role in swing door design, it assists the door opening and closing with the help of check arm profile guided by roller and spring. This allows the load transferred from door to body through checkstrap first and then through hinges. The load interval between door full open to door over-open becomes critical for door durability performance. During this event, the majority of energy absorbed by the checkstrap mechanism and checkstrap attached components such as door inner panel, hinge tap plates, BSO and BSO hinge reinforcement. Hence, the checkstrap mechanism representation is very important for the door opening simulation. Door opening dynamic analysis performed in LSDYNA solver and nCode used to perform the fatigue life analysis with strain life approach.


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