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Elastic Fibre Prestressing Mechanics within a Polymeric Matrix Composite
Hui Chen1, Folian Yu1, Bing Wang1
1Fujian Provincial Key Laboratory of Terahertz Functional Devices and Intelligent Sensing, School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350108, China.
Polymers
|January 21, 2023
Summary
The elastic fibre prestressing (EFP) technique enhances composite static performance but requires optimization. An optimal EFP level maximizes benefits while minimizing negative impacts on the fibre/matrix interface for improved composite mechanics.
Area of Science:
- Materials Science
- Polymer Science
- Mechanical Engineering
Background:
- Thermal residual stresses impact polymeric composite performance during curing.
- Elastic Fibre Prestressing (EFP) is a technique to mitigate these stresses.
- Limited understanding exists regarding EFP's effect on dynamic mechanical properties and viscoelasticity.
Purpose of the Study:
- To develop a theoretical model for analyzing EFP mechanics.
- To investigate the influence of EFP on static, dynamic, and viscoelastic properties of composites.
- To propose mechanisms explaining EFP's effects on in-plane stress evolution.
Main Methods:
- Development of a theoretical model to decouple EFP principles.
- Fabrication of elastically prestressed polymeric matrix composite (EPPMC) samples using a custom fibre prestressing rig.
- Comprehensive mechanical testing, including static, dynamic, and viscoelastic creep performance analysis.
Main Results:
- An optimal EFP level was identified to maximize performance benefits.
- EFP was found to negatively affect the fibre/matrix interface.
- Observations provided insights into in-plane stress evolution within the composite.
Conclusions:
- EFP offers a method to improve static mechanical performance of composites.
- Careful control of EFP levels is crucial to balance benefits and drawbacks.
- The study provides a mechanistic understanding of EFP's impact on composite behavior.
Keywords:
carbon-fibre-reinforced polymeric compositeelasticity and viscoelasticityfibre/matrix interfacein-plane stressmechanicsprestressMore Related Videos
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