Direct Joule Heating as a Means to Efficiently and Homogeneously Heat Thermoplastic Prepregs.
TLDR
The findings show that the quality of heating is determined by the shape and size of the electrodes, and parts based on woven fabric can be heated more homogeneously because of the existence of intersections between rovings, generating contact between fibers.Abstract:
Although direct Joule heating is a known technique for heating carbon fiber reinforced plastics, it is a yet unexplored heating method for thermoplastic prepregs before back-injection molding. The knowledge obtained from resistance welding, for example, is not directly transferable because of considerably higher heated volumes and more complex shapes. In this study, the governing parameters and process limits are established for this method. The influences of the contacting, the materials used, and the size of the heated part are investigated with respect to the part temperature and heating efficiency. The findings show that the quality of heating is determined by the shape and size of the electrodes. Larger electrodes lead to a more homogeneous temperature distribution. Parts based on woven fabric can be heated more homogeneously because of the existence of intersections between rovings, generating contact between fibers. An increase in part width results in uneven heating behavior.read more
Citations
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A Review of Multiple Scale Fibrous and Composite Systems for Heating Applications.
Inês Pimentel Moreira,Usha Kiran Sanivada,João Bessa,Fernando Eduardo Macedo Cunha,Raúl Fangueiro +4 more
TL;DR: In this article, the authors review the usage of emerging nanomaterials at the nanoscale and processed up to the macroscale to create heaters, and the creation of composite systems for electrical and thermal conductivity enhancement has been highly studied.
Journal ArticleDOI
Realizing the curing of polymer composite materials by using electrical resistance heating: A review
TL;DR: In this article , the authors proposed an electrical resistance heating curing (ERHC) method, which enables targeted heating of specific areas, which has the potential to achieve uniform curing and minimize the overall energy demand.
Journal ArticleDOI
Molecular Dynamics Simulation on the Effect of Self-Resistance Electric Heating on Carbon Fiber Surface Chemical Properties and Fiber/PP Interfacial Behavior
TL;DR: In this paper , the effect of self-resistance electric (SRE) heating on the surface chemical properties of carbon fiber (CF) was investigated by X-ray photoelectron spectroscopy.
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Induction welding of thermoplastic composites—an overview
TL;DR: In this paper, the authors present a comprehensive overview of the process of induction welding of thermoplastic composites, focusing on the types of heat generation mechanisms during the induction heating process and the parameters that govern the welding process.
Journal ArticleDOI
Experimental investigation of the resistance welding for thermoplastic-matrix composites. Part I: heating element and heat transfer
TL;DR: In this paper, a comprehensive experimental investigation of the resistance welding of carbon-fibre and reinforced polyetherimide (PEI) laminates is presented, where lap-shear and double-cantilever-beam specimens were resistance welded by using fabric and unidirectional heating elements.