A connection structure of L-shaped composite sandwich panels with metal flexible joints

Abstract

The invention provides an L-shaped composite material laminboard connecting structure with a flexible metal connector. The structure comprises foamed laminated composite material plates and metal connecting parts, wherein pre-buried metal plate parts of the metal connecting parts are embedded between laminated foams and composite material plates; composite material laminboards and the metal connecting parts are cured together by using an integral molding technique. Due to adoption of adjustable flexible connectors, the assembling stress is effectively reduced, and flexible assembling is achieved; the pre-buried metal plate parts are designed as a forked tail structure, so that the concentrated stress at the connecting parts of the metal plates and the composite material plates is effectively reduced; the connecting parts are of circular arc-shaped design, so that the bending strength is improved; due to a co-curing technique, composite material openings and the like are avoided, and the integrity of the composite material plates is ensured; a relatively large space is reserved in the metal connecting parts, so that convenience can be brought to pipeline laying and later maintenance. The structure is applicable to mechanical connection of composites material laminboards and other structures of large-size structures.

Description

technical field [0001] The invention relates to the field of mechanical connections between composite material sandwich panels and other structures used in large structures, in particular to an L-shaped composite material sandwich panel connection structure with metal flexible joints. Background technique [0002] Composite materials are composed of two or more materials with different properties, which are composed of materials with new properties in the macro (micro) through physical or chemical methods. Various materials learn from each other in terms of performance and produce synergistic effects, so that the comprehensive performance of the composite material is better than that of the original constituent materials to meet various requirements. The matrix materials of composite materials are divided into two categories: metal and non-metal. Commonly used metal substrates are aluminum, magnesium, copper, titanium and their alloys. Non-metallic substrates mainly includ...

AI Technical Summary

Problems solved by technology

However, both riveting and bolting can damage the integrity of composite panels, causing stress concentrations

In addition, due to the anisotropic characteristics of composite materials, the stress concentration at the joint is more serious than that of isotropic materials, and there are many factors that affect the joint strength of composite materials, such as layering methods, load directions and environmental influences. etc., and the failure modes are diverse, it is difficult to accurately predict their strength

Images