Method for establishing PEEK composite material fiber laying heat transfer model

Abstract

The invention provides a method for establishing a PEEK composite material fiber placement heat transfer model. The method comprises the following steps: defining a fiber placement temperature field analysis unit in a pretreatment module, selecting a thermal analysis unit type, establishing a geometric model, defining thermoplastic fiber and mold material related attributes, and dividing thermal analysis grids at equal intervals; defining a heat flow density load and a heat dissipation boundary condition in a solving module, and setting a load step option; establishing a geometric model by utilizing an ANSYS finite element analysis software cyclic loading technology and a birth-death unit, applying an initial temperature and a boundary condition, killing all the layering units, activatingthe bth unit of the a layer, applying a thermal load to an activation unit to delete the thermal load of the previous load step, and repeating the steps; solving the transient process of the temperature field, carrying out equidistant grid division on the thickness and length directions of the base layer of the paving layer, and dividing two units in the thickness direction of each layer; and setting a command stream through the APDL, and completing the establishment of a related model.

Description

technical field [0001] The invention relates to a heat transfer model technology, in particular to a method for establishing a PEEK composite material fiber laying heat transfer model. Background technique [0002] Fiber-reinforced composite materials have the advantages of light weight, high specific strength and specific modulus, no reflection of electromagnetic waves, and large design freedom. They have become the preferred materials for aerospace components and large passenger aircraft. Due to the characteristics of stable quality and high molding efficiency (about 5 to 20 times the efficiency of manual laying), the automatic lay-up molding technology has been applied in foreign aircraft manufacturing enterprises. The use of fiber-reinforced composite materials can reduce the weight of the aircraft itself, reduce fuel consumption, and improve the overall performance of the aircraft. [0003] The in-situ curing technology is adopted in the thermoplastic fiber laying proc...

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Problems solved by technology

[0004] In order to achieve the above purpose, the present invention provides a method for establishing a PEEK composite fiber laying heat transfer model to solve the problem that the heat transfer model is difficult to accurately reflect the complex temperature field changes inside the layup during the automatic laying process of thermoplastic fibers

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