Carbon fiber composite materials to replace the traditional metal materials, especially in the manufacture of important structural components of the application, the middle need to consider the impact of many factors. Xiaobian today for you to detail the carbon fiber Composite Materials components of the design points, the text involved in the Composite Materials is generally referred to as carbon fiber prepreg laying structure.
Strength and stiffness
Since it is a structural part, then the designer must first consider the strength and stiffness. Components under the action of external forces, resistance to deformation and destruction of the ability, but this ability is limited.
How to determine the use of components of the load, not beyond the capacity of the part of the limit, is calculated through the material mechanics. The component of this capacity limit, is the carbon fiber Composite Materials designers need to consider the issue.
Through reasonable match with fiber and resin, optimize the fiber arrangement, with the least material to meet the design needs, reflects the composer designer superb skills. However, the factors that determine the strength and stiffness of the Composite Materials are not only related to the type of fiber and resin, but also to the direction of the laying of the carbon fibers and the binding between the layers and the layers.
Therefore, the designer in the design of carbon fiber Composite Materials components, the need to consider the three hierarchical structure of the mechanical properties.
The mechanical properties of the monolayer material, which is composed of matrix and reinforcing material, are determined by the mechanical properties of the constituent materials, the geometrical (the shape, distribution and content of each phase material) and the interface area.
The laminates formed from the monolayer material are mechanically determined by the mechanical properties of the monolayer material and the geometry of the layers (the thickness of each layer, the laying direction, the laying sequence).
The top structure refers to the structure or product structure, which is usually referred to, and its mechanical properties are determined by the mechanical properties and structural geometry of the laminate.
In addition to the strength and stiffness requirements, the designer also need to consider the instability of Composite Materials, especially for some thin rod structure, in the pressure, it should be able to ensure its original linear balance. For some frame structure parts, if the laying is not uniform, will produce warping instability, so in the manufacturing process, especially attention. It is best to use symmetrical pavement to prevent uneven deformation.
Under normal circumstances, in the parts did not reach the ultimate load, not allowed to produce instability phenomenon. But if for some special requirements, can produce instability phenomenon, then the design process, to consider the instability process will not affect the ultimate load.