Method for calculating bonding strength of connecting area of composite material structure and metal material structure

By establishing geometric models and finite element models of composite materials and metal material structures, the adhesive connection structure is simulated, and the common node method is used to connect, which solves the problem of inaccurate calculation of stress states of adhesive connections in the existing technology, and achieves more accurate strength calculation and engineering applications.

CN119692082APending Publication Date: 2025-03-25HIWING AVIATION GENERAL EQUIP
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Patent Information

Application Number
CN202311245337.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-09-25
Publication Date
2025-03-25

AI Technical Summary

Technical Problem

The prior art is difficult to accurately calculate the stress state of the bonding connection between composite materials and metal material structures, resulting in inaccurate calculation results, and the cumbersome equivalent modeling process leads to problems with the extension of calculation period and convergence.

Method used

By establishing a geometric model of composite material structure and metal material structure, and using the finite element method, the composite material structure is simulated as a shell unit, and the metal material structure and glue layer are three-dimensional tetrahedral units, the structure is connected by a common node method, and finite element analysis is performed to obtain the bearing capacity of the glue layer connection structure.

Benefits of technology

It realizes a more accurate calculation of the strength of the adhesive connection between composite materials and metal material structures, avoids the problems of extended calculation period and inaccurate simulation results in the equivalent modeling process, and is suitable for engineering applications.

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Abstract

The invention provides a method for calculating the bonding strength of a connecting area of a composite material structure and a metal material structure, which comprises the following steps: respectively establishing a geometric model of the composite material structure and a geometric model of the metal material structure, and bonding the composite material structure and the metal material structure through a glue layer to finish geometric modeling of the connecting structure; establishing a finite element model for bonding the composite material structure and the metal material structure; the composite material structure, the adhesive layer and the metal material structure are connected according to a real connection mode by adopting a common-node method; and aerodynamic load and boundary condition constraint are applied to the finite element model, finite element analysis is carried out, and the bearing capacity of the rubber layer connection structure is obtained through analysis. By applying the technical scheme of the invention, the connection mode of three different types of material structures can be simulated more truly and accurately, and the efficiency and effectiveness of strength calculation are improved.
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