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Four common fiber orientations of carbon and glass fibers and their properties

Views:54 Author:Linda Publish Time: 2023-05-30 Origin:

Carbon fiber or glass fiber tube or plate fibers are moved in different specific directions. Comparing the different types of tubing, it will be seen that the fiber orientation is not always consistent and different orientations can be used depending on the desired end product.

Fibers can be oriented in any direction between 0° and 180°, although fiber orientations beyond 90° are often referred to as negative angle values. For example, a 135° fiber angle equals a -45° angle. Most carbon fiber and fiberglass tubes come in a combination of two or more of the following orientations:

1) 0° - Zero fiber angle is the most commonly used orientation. Fibers are strongest and stiffest when they are oriented in the direction of the load. On the pipe, the zero-degree direction runs along the length of the pipe and contributes to the flexural stiffness strength.

2) 90° – Use a 90-degree fiber angle when bi-directional bending is required. In the tube, the ninety-degree fibers are oriented on the circumference of the tube. They help prevent the tube from being pinched or bent when loaded.

3) ±45° – Forty-five-degree angles are often used in conjunction with zero and ninety-degree layers to create quasi-isotropic stacks. Positive 45-degree layers are almost always paired adjacent to negative 45-degree layers. When used on tubing, the forty-five-degree plies contribute to torsional stiffness and strength.

4) Braided fibers are often said to have a 0/90 degree fiber angle because there are fibers in both directions but in a single piece. Some woven materials can contain more fiber directions; for example, triaxial weaves have fibers in three directions and are usually quasi-isotropic.

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