The most popular kind of reinforced plastics are fiber-reinforced plastics, and they often include the following features.

High modulus and strength

After fiber reinforcement, the number strength and modulus are obviously better. For instance, after being reinforced, some general-purpose plastics can also be used as engineering plastics. These engineering plastics, when reinforced with fiber, can have strength and modulus that are comparable to those of steel, and some reinforced plastics even have better specific strength and specific modulus than unreinforced ones. metallic substance.

Adequate stress absorption

Due to the viscoelastic properties of the plastic matrix, on the one hand, the viscoelastic internal friction within the plastic matrix can dissipate mechanical energy when subjected to external shock vibration or frequent machine vibration, acoustic vibration, and other mechanical waves; on the other hand, due to the The interface between the fiber and the matrix has good vibration absorption capacity, high vibration damping, and no early damage caused by resonance.

Excellent fatigue resistance

The reinforced plastic has superior fatigue resistance than metal because the contact between the fiber and matrix can stop cracks from spreading.

Good overload protection

Fiber-reinforced polymers include several independent fibers in enormous quantities. The load will be swiftly shifted to the undamaged fibers when a few fibers break owing to overload, preventing the component as a whole from rapidly losing its bearing capacity.

Increased heat resistance

The majority of unreinforced thermoplastics only function well at temperatures between 50 and 200 °C and have modest thermal distortion temperatures. For instance, nylon 6 has a heat distortion temperature of roughly 60°C before it is reinforced, but the temperature can rise to about 190°C after strengthening.

Small linear expansion coefficient

Due to the inclusion of fiber components, reinforced plastics have a low linear expansion coefficient and a low rate of product molding shrinkage, which creates extremely ideal circumstances for the production of goods with relatively high dimensional accuracy requirements. However, molding shrinkage has a directionality that should be completely taken into account when designing products, creating molds, and producing them.

A design with good material performance

Fiber-reinforced plastics with varying performance combinations may be produced to adjust to the load distribution of various engineering constructions by selecting various resins, reinforcing materials, other components, and composition ratios.

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