Abstract
This work presents the influences of glass fiber content on the mechanical and physical characteristics of polybutylene terephthalate (PBT) reinforced with glass fibers (GF). For the mechanical characterization of the composites depending on the GF reinforcement rate, tensile tests are carried out. The results show that increasing the GF content in the polymer matrix leads to an increase in the stiffness of the composite but also to an increase in its brittleness. Scanning Electron Microscope analysis is performed, highlighting the multi-scale dependency on types of damage and macroscopic behavior of the composites. Furthermore, flammability tests were performed. They permit certifying the flame retardancy capacity of the electrical composite part. Additionally, fluidity tests are carried out to identify the flow behavior of the melted composite during the polymer injection process. Finally, the cracking resistance is assessed by riveting tests performed on the considered electrical parts produced from composites with different GF reinforcement. The riveting test stems directly from the manufacturing process. Therefore, its results accurately reflect the fragility of the material used.
Highlights
Reinforced composites are nowadays widely used in multifunctional industrial products, such as electrical and electronic components
This study focuses on the assessment of the impact of the glass fiber (GF) content of polybutylene terephthalate (PBT)/GF composite on the mechanical and physical characteristics of electrical component parts
High GF reinforcement rates in the structure causes a decrease in the elongation at break, which means an increase in the brittleness of the composite
Summary
Reinforced composites are nowadays widely used in multifunctional industrial products, such as electrical and electronic components. The choice of composite material is closely related to its use, more precisely the choice of the matrix, the fibers and the reinforcement rate is based on their mechanical and physical characteristics. The choice of plastic composite material for the injection molding process is a key step in new product development and integration. This choice is crucial and will lead to the optimum injection process parameters, assembly methods, and the determination of product use. The riveting operation of the metal pin in the composite body leads to an overload of the material.
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