A study of process induced voids in resistance welding of thermoplastic composites

Conference paper (2015)
Department
Aerospace Structures & Materials (Aerospace Engineering) (TU Delft)
Copyright: © 2015 The Author(s)
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Published Date

19-07-2015

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Source:

ICCM 20: 20th International Conference on Composite Materials, Copenhagen, Denmark, 19-24 July 2015

Faculty

Aerospace Engineering

Department

Aerospace Structures & Materials

Abstract

Void formation in resistance welding of woven fabric reinforced thermoplastic composites was investigated. Void contents were measured using optical microscopy and digital image process. Un-even void distributions were observed in the joints, and more voids were found in the middle of the joints than the edges. A higher welding pressure was shown to help reduce the void generation. The mechanisms of void formation, in particular fibre de-compaction induced voids and residual moisture induced voids, were analysed. The model estimations were correlated with the experimental results.

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