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What does the strength of carbon fiber depend on?
Release date: [2017/9/4] Read total of [605] times

Carbon fiber, as we usually call it, is a vague general term, and the performance of different kinds of carbon fiber varies widely. Note that what we call "carbon fiber" is actually a "carbon fiber reinforced composite" abbreviation and commonly known as "carbon fiber", which is different from real "carbon fiber". Simply understood, the true "carbon fiber" is like a piece of wool, and what we usually call "carbon fiber" is a variety of sweaters, scarves, gloves and so on.

The so-called carbon fiber reinforced composite material, in fact, USES a lot of carbon fiber, which is arranged in a certain direction, and then is closely connected with resin or other adhesion materials. This one, for example, is a carbon fiber, and these cylinders are filled with resin filled in the middle. The distribution density of these fibers directly influences the final material performance. Because of this, we can control the ultimate performance of carbon fiber materials by adjusting the so-called fiber volume fraction, which is the fiber volume ratio. Simply put, the more dense the fiber, the more fiber in the unit volume, the higher the strength along the fiber direction; Conversely, the less fiber, the less fiber in the unit volume, and the lower the strength of the carbon fiber material. (PS: the density of cloth depends on the gram weight of the carbon cloth)

For carbon fiber used in engineering, the fabric can be either single-directional or multi-directional. The most common of course is the multi-directional crossover, which is the appearance of the carbon fiber that we often see. For carbon fiber used in engineering, the fabric can be either single-directional or multi-directional. The most common of course is the multi-directional crossover, which is the appearance of the carbon fiber that we often see. For example, this is a single direction (also known as a one-way cloth).

So this is a multi - directional crossover, and the appearance of our usual carbon fiber is this bidirectional cross texture. The original carbon fiber material is like this, it is more like cloth, can bend, can be rolled into a roll. (3K twill carbon fiber cloth)

This has led to a widespread misunderstanding of carbon fiber materials, which is to confuse the "fiber" and the ultimate "fiber composite". "Fiber" is a simple measurement of single cylinder, the performance of such tests of performance is very surprising, that is a lot of people and even some popular science readings often say several times or even ten times as much as steel. But really is not used in the engineering application of a single one of the fiber, but the fiber and resin of fiber composite material, the engineering performance depends not only on the performance of the single fiber, also the influence of the performance of resin and fiber density, more affected by fiber direction. In other words, the performance of carbon fiber material is actually a weighted average of fiber performance and filling resin performance. For most carbon-fiber composite materials, the test results may be stronger than steel, but the difference is not so different.