Journal
PLASTICS RUBBER AND COMPOSITES
Volume 51, Issue 8, Pages 383-392Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/14658011.2022.2108982
Keywords
Joule heating; contact resistance; contact resistance heating; towpreg; powder epoxy
Categories
Funding
- CIMCOMP EPSRC Future Composites Manufacturing Research Hub
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Contact resistances are important in Joule heating systems. Measuring the contact resistances between metal roller electrodes and carbon fiber tows provides a better understanding and improves the accuracy of the heating process. The study shows that contact resistances in the towpregging line are significant and contact resistance heating changes the heating profile.
Contact resistances play a major role in Joule heating systems. Identifying contact resistances provides a better understanding of the heating process and increases the accuracy of the process models. In this study, contact resistances of the Joule heating section in a powder-epoxy-based towpregging line were explored. For different process parameters, such as production speed, tension, and temperature, contact resistances occurring between metal roller electrodes and dry carbon fibre tows (i.e. without powder-epoxy) were measured to gain an insight into the heating process. Moreover, the effect of contact resistance heating on the temperature profile of the carbon fibre tows was determined with an infrared thermal camera. A simplified finite element model was developed to calculate the temperature distribution onthe carbon fibre tow, which showed a good agreement with the experimental data. Results suggest that contact resistances in the towpregging line were significant and contact resistance heating changed the heating profile.
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