Title: ANISOTROPY RELATED ‘SPRING-IN’ OF ANGLED COMPOSITE SHELLS
Page Range: p.393-402
Author(s): Ding Y; Chiu W K; Liu X L
File size: 75K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 9
Issue No: No. 6
Abstract
A 3-D finite element analysis procedure was developed to predict spring-in resulting from anisotropy for both thin and thick angled composite shell structures.. It is believed that such distortion of curved or angled shell structures occurs mainly from the significant difference between the in-plane CTE and the through-thickness CTE during post cure cooling. The results of the FE analysis were evaluated together with those from the analytical study and experimental investigations. FE analysis was demonstrated to provide more accurate results than the analytical model, particularly for thicker composite shells. The corner radius effect, shell thickness effect and lay-up sequence effects on spring-in are discusses, together with the effect of tool/part interaction on the total distortion behaviour. 16 refs.
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