Three-dimensional prefabricating body of multi-shape section combination

Abstract

The invention discloses a three-dimensional prefabricating body of a multi-shape section combination. The section of the three-dimensional prefabricating body is of a heteromorphism structure and is formed by four sections with different shapes which are connected, the first section is a square, the second section is composed of a shrinking shaped curved surface and an expansion shape curved surface, the third section is a square, and the forth section is the expansion shape curved surface; the prefabricating body is composed of the same unit cell structures, each unit cell structure comprises knitting yarns the four directions of which are arranged on a body diagonal line, and the knitting yarns are interweaved to form a space four-direction structure in a slanting manner. The three-dimensional heteromorphism prefabricating body which closes to the size shape design is adopted to replace a metal material of the single shape size, the volume of a component is greatly shrunk, the weight is lightened, and the miniaturization and lightweight ultimate target is met; a clear dimension-like profile modeling whole knitting formation is adopted, the secondary operation workload is greatly reduced, the production-manufacturing cost is saved, the cost performance of the composite material of the three-dimensional heteromorphism prefabricating body is further promoted, and the future application field is contribute to expanding.

Description

Technical field [0001] The invention relates to a three-dimensional preform, in particular to a three-dimensional preform with a combination of multiple shapes and cross-sections. Background technique [0002] Driven by the new demand for high-performance composite materials in the aerospace industry, three-dimensional weaving technology has developed rapidly since the 1970s. The composite material reinforced by the three-dimensional braided preform has excellent comprehensive mechanical properties, higher damage tolerance and excellent ablation resistance, which provides a broad range of composite materials used in main load-bearing structural parts and multi-functional structural parts. prospect. [0003] The three-dimensional woven prefab is a structural reinforcement frame of composite materials, which functions similarly to the steel frame in buildings. Before the composite material structure is formed, the reinforcement fibers are positioned and distributed using three-dime...

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