Effect of Broken Fiber on Stress Transfer of Short Fiber Reinforced Thermoplastic Matrix Composite
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Date
2019-08-22
Journal Title
Journal ISSN
Volume Title
Publisher
JOURNAL OF NANO- AND ELECTRONIC PHYSICS
Abstract
Short fibers are becoming increasingly popular reinforcing elements in products made by injection
molding. Short-fiber reinforcement allows the polymer to be processed employing the same methods as
those used for unreinforced polymers. The best mechanical performances are achieved in composites when
fibers are aligned in the loading direction. There are different methods developed by researchers in order to
manufacture aligned short fiber reinforced polymer composites. Unidirectional composites tend to be very
stiff and strong in fiber direction but very weak in the transverse direction. Their weakness in transverse
direction is attributable to presence of significant stress concentration at the interface of matrix and fiber.
In short fiber composites, loads are not directly applied on the fibers but are applied to the matrix and
transferred to the fibers through the fiber ends. The process of transfer of load between fibers and matrix
in the neighborhood of a fiber break or a matrix crack depends on the strength of the interface. The objective of this study is to analyze the fiber breaking effect in composite made of nylon 66 (PA) matrix reinforced with short glass fiber, in which the fiber diameters of 4.76, 6.35, and 9.5 m were used. A fiber volume fraction of 20 % was assumed in each mode
Description
Short fibers are becoming increasingly popular reinforcing elements in products made by injection
molding. Short-fiber reinforcement allows the polymer to be processed employing the same methods as
those used for unreinforced polymers. The best mechanical performances are achieved in composites when
fibers are aligned in the loading direction. There are different methods developed by researchers in order to
manufacture aligned short fiber reinforced polymer composites. Unidirectional composites tend to be very
stiff and strong in fiber direction but very weak in the transverse direction. Their weakness in transverse
direction is attributable to presence of significant stress concentration at the interface of matrix and fiber.
In short fiber composites, loads are not directly applied on the fibers but are applied to the matrix and
transferred to the fibers through the fiber ends. The process of transfer of load between fibers and matrix
in the neighborhood of a fiber break or a matrix crack depends on the strength of the interface. The objective of this study is to analyze the fiber breaking effect in composite made of nylon 66 (PA) matrix reinforced with short glass fiber, in which the fiber diameters of 4.76, 6.35, and 9.5 m were used. A fiber volume fraction of 20 % was assumed in each mode