Bonding assembly performance evaluation method

Abstract

The invention provides a bonding assembly performance evaluation method. According to the method, an in-plane shear test piece and an out-of-plane peel test piece are prepared so as to be adopted to perform an in-plane shear test piece and an out-of-plane peel test piece; a maximum in-plane shear breaking load F and an out-of-plane peeling breaking load F are obtained and are adopted as the inputof a simulation model, and simulation calculation is carried out, so that a maximum in-plane breaking strength sigmasin and a maximum out-of-plane breaking strength sigmasout can be obtained; the maximum allowable stress of an adhesive layer is defined; and the maximum in-plane shear stress gammajin and maximum out-of-plane shear stress gammajout of the adhesive layer under various working conditions are compared with each other, bonding schemes are evaluated, and the feasible region of the defect tolerance range of the adhesive layer is provided. Safety margin is determined on the basis of material strength calculated through the simulation model, and therefore, errors caused by material strength which is obtained by an original simulation model through an experiment can be decreased, andtherefore, the evaluation of bonding assembly performance design schemes is realized.

Description

technical field [0001] The invention relates to an adhesive assembly performance evaluation method, which belongs to the technical field of structural assembly. Background technique [0002] The air-breathing hypersonic vehicle flies in the atmosphere for a long time and at a high Mach number, and the aerodynamic and thermal environment on the surface of the vehicle is very harsh. At present, the heat protection system of the aircraft surface generally adopts a thermal protection structure with high efficiency, temperature resistance and heat insulation integration, such as the ceramic panel integral composite heat insulation tile (composite heat insulation tile for short) on the outer surface of a short-duration aircraft. Composite heat insulation tiles are mainly bonded and assembled with silicone rubber and the inner load-bearing structure. If the quality of the bonded assembly is not good, it will directly affect the performance of the heat protection system, and may eve...

AI Technical Summary

Problems solved by technology

However, due to the complex mechanical behavior characteristics of adhesives, it is difficult to establish a high-precision simulation analysis model, and the stress / strain results obtained by the simulation analysis model may have large errors with the actual response. The traditional evaluation method is difficult to apply, and a new type of evaluation method needs to be established. A Strength Evaluation Method Applicable to High Uncertainty Simulation Analysis Models

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