Anisotropy composite material workpiece tool template design method of autoclave molding composite material
A tooling design, anisotropic technology, applied in the direction of calculation, special data processing applications, instruments, etc., can solve the problem of difficulty in matching the thermal expansion coefficient of anisotropic composite materials and tooling templates.
Active Publication Date: 2012-12-12
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
The design method provided by the invention solves the problem that the anisotropic composite material parts and tooling templates are difficult to match in the anisotropic thermal expansion coefficient during the autoclave forming process, improves the precision of the parts, and ensures the product quality
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[0059] Composite materials used for low-temperature forming and high-temperature use are used as tooling formwork materials. Based on the lay-up information of anisotropic composite material parts, the calculation formula of thermal expansion coefficient in the scheme is used to calculate the anisotropic composite material parts in all directions. The thermal expansion coefficient of the composite tooling formwork is designed based on this, and then the thermal expansion coefficient of the tooling is calculated. Through the comparison of the thermal expansion coefficients of the parts and the tooling, the design of the tooling formwork is optimized, and finally the tooling and tooling are compared. The coefficient of thermal expansion of the part is matched in all directions.
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The invention relates to an anisotropy composite material workpiece tool template design method of an autoclave molding composite material, belonging to the technical field of autoclave molding tool design of anisotropy composite material workpieces. The method comprises the following steps of: manufacturing a tool template by adopting a composite material formed at a low temperature and used at a high temperature; calculating and acquiring omnidirectional heat expansion coefficients of a workpiece by known workpiece layering information and engineering constants; designing a layering mode ofthe composite material tool template according to the heat expansion coefficients of the workpiece so that the omnidirectional heat expansion coefficients of the workpiece and the tool are matched and the absolute error is smaller than 10 percent; and carrying out layering design again if the heat expansion coefficient error of the workpiece and the tool exceeds an error range by calculation so that the workpiece and the tool are constantly deformed. The design method solves the problem of match difficulty of the omnidirectional heat expansion coefficients of the anisotropy composite materialworkpiece and the tool template in the autoclave molding process, improves the workpiece precision and ensures the product quality.
Description
technical field [0001] The invention relates to a design method of a composite material tooling template for an anisotropic composite material product to be formed in an autoclave. The invention belongs to the technical field of anisotropic composite material parts autoclave forming tooling design. Background technique [0002] The biggest advantage of advanced composite materials is high specific strength and high specific modulus. Another feature is that it can be designed, that is, by changing the layup angle, layup sequence, layup thickness and fiber content, to obtain the required product design. performance. Fiber-reinforced composite materials based on resin have been widely used in many fields such as aerospace, military industry and civil use. [0003] The performance of composite materials depends not only on the properties of the fibers and the matrix material itself, but also on the content and laying of the fibers. Utilizing the designability of composite mat...
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IPC IPC(8): G06F17/50
Inventor 李迎光万世明王红星李德尚于刚张吉傅浩杰傅承阳
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS