A foam sandwich structure of a composite launch tube and its integrated molding method

Abstract

The invention discloses an integrated molding method for a foam sandwich structure of a composite material launch tube, comprising: an inner structure layer; an outer structure layer; multiple sets of ring ribs, which are arranged at intervals along the axial direction of the inner structure layer and the outer structure layer Between the structural layers; wherein, each group of ring bars includes: a first ring bar, which includes a first ring bar matrix and a first ring bar body; a second ring bar, which is spaced apart from the first ring bar, and the second ring bar Including the second ring rib matrix and the second ring rib body; and a plurality of reinforcement areas, which are arrayed along the circumference of the inner structure layer; the two ends of the reinforcement area are respectively joined with the first ring rib and the second ring rib; wherein, the first The axial sections of the first ring rib matrix and the second ring rib matrix are both trapezoidal, and the bottom surface of the trapezoid is joined to the inner structure layer; the foam filling layer is arranged between the inner structure layer and the outer structure layer, and is located in the first ring rib , the second ring reinforcement and the space outside the reinforced area.

Description

technical field [0001] The invention belongs to the technical field of composite material launch tubes, and in particular relates to a composite material launch tube foam sandwich structure and an integrated molding method thereof. Background technique [0002] The launch tube is an important part of the missile weapon system. It has the functions of orientation, support, erection, temperature adjustment, storage, etc., and the launch tube bears great pressure when the missile is launched. The existing composite material launching tube has low loading efficiency and heavy weight. [0003] As a new type of structure, the foam sandwich structure of the launching tube has been widely used in construction, transportation, Ships, aerospace and other fields. However, the continuity of fibers in the sandwich structure has always been a concern of people. It will affect the overall load-carrying capacity of the launching tube, cause cracks in the launching tube, and reduce the ser...

AI Technical Summary

Problems solved by technology

However, the fiber continuity of the sandwich structure has always been a concern of people. It will affect the overall bearing capacity of the launch tube, cause cracks in the launch tube, and reduce the life of the launch tube.

[0004] In the prior art, the forming technology of the reinforcement area of ​​the foam sandwich structure of the launching tube is to embed the entire reinforcement block between the foam blocks, resulting in that the fibers in the reinforcement area and the fibers of the ring ribs on both sides are not continuous, which affects the bearing capacity of the sandwich structure

In addition, after the ring rib car is processed, it forms a right angle with the inner structure layer, which will cause stress concentration at the root of the ring rib

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