Abstract: This article reported a case study for the soft plastic cover plate made of polycarbonate (PC)/acrylonitrile-butadiene-styrene copolymer (ABS) alloys in terms of the structure analysis by ANSYS finite element method and experimental verification. The results indicated that the H-type and the double-Y-type air bag soft plastic cover plates could be opened precisely during the blast, but there were some debris generated. For this defect, two structural optimization schemes were proposed by reducing the residual thickness and adding supporting blocks and antislip strips on the surface of the cover plate. These optimization schemes were verified, and the results indicated that these two optimization schemes were helpful to reduce the generation of debris in the air bag flexible plastic cover plate made of PC/ABS alloys.

Key words: polycarbonate, acrylonitrile-butadiene-styrene copolymer, alloy, air bag cover plate, structural optimization