On the source of the thermoelastic response from orthotropic fibre reinforced composite laminates

Research output: Contribution to journalArticle (Academic Journal)peer-review

Abstract

In thermoelastic stress analysis (TSA) of orthotropic laminated polymer composites, heat transfer influences the measured stress induced temperature change, or ‘thermoelastic response’. The composite constituents, including different fibre types, fibre geometry, ply thickness and resin systems, in combination with the manufacturing process means that, even for nominally identical materials, different conditions are generated for heat transfer. Hence, definitively identifying the ‘source’ of the thermoelastic response for a general composite laminate has remained elusive. A procedure based on the simultaneous application of digital image correlation (DIC) and TSA is devised that enables the source of the thermoelastic response to be established categorically. In glass fibre laminates, it is shown that heat conduction cannot take place so the thermoelastic response emanates from the surface resin rich layer. In similar carbon fibre laminates, adiabatic conditions are only met at higher frequencies with the response emanating from the orthotropic surface ply.
Original languageEnglish
Article number106515
Number of pages15
JournalComposites Part A: Applied Science and Manufacturing
Volume149
Early online date8 Jun 2021
DOIs
Publication statusE-pub ahead of print - 8 Jun 2021

Bibliographical note

Funding Information:
This work was supported by the Engineering and Physical Sciences Research Council [grant number EP/P006701/1], as part of the EPSRC Future Composites Manufacturing Research Hub. The experimental work described in the paper was conducted in the Testing and Structures Research Laboratory (TSRL) at the University of Southampton. The authors acknowledge the support received from Dr Andy Robinson, the TSRL Principal Experimental Officer. The authors would also like to thank Dr Karthik ‘Ram’ Ramakrishnan for manufacturing of the CFRP panels at the University of Bristol.

Funding Information:
This work was supported by the Engineering and Physical Sciences Research Council [grant number EP/P006701/1], as part of the EPSRC Future Composites Manufacturing Research Hub. The experimental work described in the paper was conducted in the Testing and Structures Research Laboratory (TSRL) at the University of Southampton. The authors acknowledge the support received from Dr Andy Robinson, the TSRL Principal Experimental Officer. The authors would also like to thank Dr Karthik ?Ram? Ramakrishnan for manufacturing of the CFRP panels at the University of Bristol.

Publisher Copyright:
© 2021 Elsevier Ltd

Keywords

  • B-Thermomechanical
  • B-Optical properties/techniques
  • D-Thermal analysis
  • D-Mechanical testing

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