Plain twill weave is widely used in carbon fiber surface textures because of its common and simple weaving structure. Of course, the surface textures of carbon fiber products are not limited to this.
When you choose carbon fiber pipes, everyone has their own preferences, some like twill weave, which has a more three-dimensional effect, and some prefer plain weave, which has excellent compactness and strength. Everyone has their own advantages, and twill and plain weave also have their own advantages.
plain weave
The warp and weft are woven together up and down. The more obvious feature is that the warp and weft interweave more nodes. Compared with twill and unidirectional lines, the permeability of resin to plain weave is not as good as that of twill. Of course, under 10 layers of fabric layers The resin permeability of the two is similar, so the strength of the resin matrix is also similar. But because of the many interweaving points, the plain weave material has high bending strength, slightly higher tensile strength than twill weave, high balance, and no three-dimensional feeling like twill weave. This phenomenon becomes more obvious as the number of fabric layers increases. Therefore, you will find that when choosing low-thickness carbon fiber products, we will habitually recommend plain surface products. That’s why.
Here I would like to add that there are often uncertainties in the weaving process of fabrics, especially when quantifying the mechanical properties of standard fabrics and the theoretical value will be half the difference, such uncertain factors, especially in some aerospace, UHV, Where fatigue work is too high is especially deadly. This is why in the study of fabric mechanics, every scientific researcher will find that his own experimental results not only deviate from the theoretical value, but also do not conform to the previous experimental results. But for many applications, fabric composites are used due to their high specific strength and specific stiffness, superior fatigue resistance, creep resistance, corrosion resistance, high temperature resistance (ceramic matrix composites) and excellent damage tolerance And other advantages, it is necessary to simulate and predict uncertain points. So far, I can’t help but sigh, seeing the incomparable brilliance, the exquisite engine, and the composite structure at air shows from time to time, how many engineers have worked day and night and worked hard!
So for carbon fiber tubes, as far as experience is concerned, when carbon fiber tubes are used for anti-corrosion high-pressure equipment and high-precision instruments, it is also time for us to conduct analysis experiments on them!
Twill
The twill weave is characterized by oblique lines formed by warp weave points or weft weave points, so the nodes are less for plain weave, but the permeability of resin is indeed better than that of plain weave, so it will be found that under normal circumstances, the plain weave of carbon fiber plate The tensile strength of the species is higher than that of twill, but the shear strength is often not as good as that of twill. This is mainly due to the penetration of resin. And because of the problem of resin penetration, when different molding processes are involved, there will be differences. For example, hot-pressed products use twill, and resin transfer molding products use twill, and the microscopic structure is also very different. He will produce the above problems, penetration, pores, cracks, twill volume content, the macroscopic effect on product quality is the fiber volume fraction, and the microscopic effect is the pores and cracks.
So don’t underestimate the carbon fiber tube as a fabric composite material. Although the scope of application is mostly in the field of low-mechanical use, the pursuit of service life is the same, and the microscopic impact will directly affect the service life of a product.
The above is what is introduced to you about what is a plain carbon fiber tube. If you don’t know anything about it, welcome to consult our website, and we will have a professional person to explain it to you.
Post time: May-17-2023