Influence of temperature on strength and failure mechanisms of resistance welded thermoplastic composites joints

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

24-07-2015

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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

In this work, the effect of temperature exposure on the strength of resistance welded joints is analysed. Glass fibre polyphenylene sulphide (GF/PPS) laminates were joined using the resistance welding technique and a stainless steel metal mesh as the heating element. Single lap shear tests at temperatures between 20°C and 150°C were performed to evaluate the strength of the welded joints and fractography was used to investigate changes in the failure mechanisms at elevated temperatures. The results show a strength reduction of 10-15% for the samples tested at temperatures up to 90°C, and a strength reduction of 22% and 38% for the samples tested at 120°C and 150°C, respectively, while the fracture surfaces observation revealed changes in the failure mechanisms of the welded joints tested at elevated temperatures.

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