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Joining Processes for Fibre-Reinforced Thermoplastics: Phenomena and Characterisation
Juliane Troschitz1, Benjamin Gröger1, Veit Würfel1
1Institute of Lightweight Engineering and Polymer Technology, Technische Universität Dresden, Holbeinstraße 3, 01307 Dresden, Germany.
Materials (Basel, Switzerland)
|August 12, 2022
Summary
Joining thermoplastic composites (TPCs) via warm forming alters their structure, impacting lightweight applications. Understanding these microstructural changes is crucial for effective multi-material joining.
Area of Science:
- Materials Science
- Mechanical Engineering
- Composite Materials
Background:
- Thermoplastic composites (TPCs) are vital for lightweight structures in high-volume production.
- Joining TPCs is critical for their integration into multi-material systems.
- Warm forming is a common joining method for TPCs, altering local material structure.
Purpose of the Study:
- To analyze deformation modes and flow mechanisms of TPCs during warm forming.
- To investigate three specific joining processes: insert embedding, contour joint molding, and hotclinching.
- To characterize the resulting microstructural changes in TPC joining zones.
Main Methods:
- Literature review of TPC forming deformation modes and flow mechanisms.
- Experimental investigation of insert embedding, contour joint molding, and hotclinching processes.
- Microscopy and computed tomography (CT) analyses of individual process stages and final joints.
Main Results:
- Warm forming of TPCs leads to modified fiber paths and varying fiber content in the joining zone.
- Each investigated joining process exhibits distinct deformation and flow phenomena.
- Microstructural analysis reveals characteristic changes influenced by the specific joining process.
Conclusions:
- The study provides a detailed analysis of TPC joining via warm forming.
- Understanding microstructural evolution is key to optimizing TPC joining processes.
- The findings are essential for the successful application of TPCs in advanced lightweight structures.
Keywords:
computed tomographyforming phenomenajoiningmaterial structuremulti-materialprocess analysisthermoplastic compositeMore Related Videos
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