Door System seals play a major role in determining door closing effort. Overcoming the resistance of the seal accounts for a substantial portion of the door closing effort. Internal Ford Motor Company testing suggests that seal resistance comprises approximately 35 - 50 % of the force to close the front door. That is, compression-deflection values of door seals have a major effect an door closing effect values. These values must be monitored in production to ensure that seal design limits are not exceeded. In order to evaluate the influence of the seal structure an door closing force, nonlinear finite element method is introduced to analyze compression deformation of a door seal for SANTANA (name of the car made by Shanghai Volkswagen Co. Ltd). The structure characteristics of the B2 seal The B2 seal is generally constructed with a sponge bulb attached to a solid carrier. The sponge bulb varies in shape and size in accordance with differences in types and sizes of body openings to be sealed. Round bulb generally is used for the B2 seal. Bulb is designed to seal with 50 - 70 % compression. The relative force to achieve this is important since it is related to door closing effort. The sponge material thickness and dimensions control this force. Essentially, the bulb provides a soft, impervious seal which can take up variances in body sizes and gaps. In order to expulse the air entrapped in door seal systems during the door closing event, air ventilation holes must be fabricated in the bulbs at intervals along the seal system. MSC Marc software is used to analyze the large deformation of the seal and the compression test is done to prove the computational results. The results show that the compression loads of the door seal are larger than the standard value of Shanghai Volkswagen Co. Ltd and the seal structure needs to be optimized. There are consistent relationships between calculating results and experimental results and the simulation method is effective.
Nonlinear finite element analysis of the structure of door seals
Die nicht-lineare Finite-Element-Analyse bei der Struktur von Türdichtungen
Journal of Dong Hua University. English Edition ; 22 , 2 ; 62-65
2005
4 Seiten, 7 Bilder, 5 Quellen
Article (Journal)
English
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