Method for weaving 2.5D angle-interlock preformed part with section gradually decreasing

Abstract

The invention relates to a method for weaving a 2.5D angle-interlock preformed part with the section gradually decreasing. On the basis of a layer-layer angle-interlock weaving process, the method ischaracterized in that in the weaving process, with one end surface of the preformed part as a standard, according to the change of the size of the section of the preformed part and the movement law ofyarn, the quantity and positions of yarn-reducing points in a plane in the weaving direction are designed, and the yarn-reducing points are evenly distributed; by means of the methods of yarn reduction, yarn movement and yarn reed replacement, the section change of the preformed part is achieved, and the section-variable preformed part is woven. The method is simple and high in applicability, thewoven formed part is good in integrity, and the mechanical properties of composites can be improved.

Description

technical field [0001] The invention belongs to the field of three-dimensional fabric weaving, and in particular relates to a weaving method for a 2.5D corner interlocking prefabricated part with decreasing cross section. Background technique [0002] The traditional laminated composite material adopts the laminate structure, and the weak interlayer performance is its main defect. In the three-dimensional fabric prefabricated part prepared by three-dimensional weaving technology, the reinforcing fibers are interwoven in three-dimensional space, which has good structural integrity. While improving the overall mechanical properties of the material, the impact toughness and damage tolerance of the composite are improved. [0003] The reinforced structure of the composite material or the shape structure and quality of the support body preform basically determine the performance of the composite material. However, in engineering applications, there is a kind of composite materia...

AI Technical Summary

Problems solved by technology

For the overall preforming of such variable cross-section parts, the traditional basic three-dimensional weaving method or technology cannot be completed, and cannot meet the requirements of high-performance composite materials for preforms

The current solution is to use traditional machining methods to obtain the required variable-section shape on the basis of the corresponding equal-section preformed parts, such as cutting a constant-section cylinder into a variable-section pin, Obviously, such processing will cause serious fiber damage, destroy the integrity of the preformed part, and cause a decline in the performance of the part, thereby reducing the performance of the reinforced structure and composite materials; on the other hand, it also increases the process and improves the Manufacturing costs of preformed parts

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