What factors should be considered when designing and manufacturing cables?

2023-11-30 10:22:31

Large specific strength and specific modulus: In terms of mechanical properties, the mechanical properties of cable composite materials depend on the performance, content and distribution of reinforcing materials, and the properties and content of the matrix material. It can be designed according to the conditions of use. In terms of strength, all three types of composite materials can achieve higher strength.

Good fatigue resistance: During the fatigue process of fiber cable reinforced composite materials, cracks first appear at the weak points of the fiber or matrix, then extend to the joint surface, and the damage gradually accumulates, leading to destruction. It shows that fiber reinforced composite materials have better damage tolerance and fatigue life.

Designability of mechanical properties: Select fibers and matrices with different properties, as well as their volume percentages, design fiber laying directions, laminations, and even three-dimensional structures, as well as the shape and geometric dimensions of the structure, so that the structure can improve performance, weight, and cost Indicators in various aspects have been optimized.

Good shock absorption: The composite cable has a high specific stiffness, so its components have a high natural frequency, which can prevent resonance from occurring. There is internal friction at the interface or between layers of fiber-reinforced polymer composite materials, and the polymer matrix has viscoelasticity. Therefore, this composite material has much greater internal damping than metal and has high vibration reduction efficiency.

Good safety performance: There are a large number of reinforcing fibers in the composite cable. When overloaded, the fibers in the weak link will first break, causing the stress to be redistributed and then transferred to the unbroken fibers through the matrix. Therefore, it does not affect the overall structure's continued load-bearing and is still safe. use.

High or low temperature and good thermal stability: Carbon fiber cable reinforced polyimide and other composite materials can be used at 250℃~300℃, with small creep deformation at high temperatures. Carbon - Carbon composite materials have good thermal shock resistance and can be used at temperatures up to 3000°C for a short period of time while still maintaining certain mechanical properties.

Good molding process performance: Composite material cables can be made into products of various shapes by various methods such as low-pressure hand lay-up molding, compression molding, winding molding, injection molding and pultrusion molding. The processing volume is small, material and energy are saved, and mold reduction is reduced. Fixture, short processing cycle.