Fastener load-deformation curve numerical simulation method

A numerical simulation and load deformation technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems that are not suitable for general engineering personnel, time-consuming and labor-intensive, and needs, and achieve the goal of improving competitiveness in the international market, simulation Simple analysis method and high computational efficiency

Inactive Publication Date: 2013-04-03
CHINA AIRPLANT STRENGTH RES INST
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of this method is that it can truly obtain the loading conditions of the fasteners. Its disadvantages are: 1) It needs test equipment, test pieces and test fixtures; Mastered by engineering personnel; 3) Time-consuming, labor-intensive and expensive

Method used

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  • Fastener load-deformation curve numerical simulation method
  • Fastener load-deformation curve numerical simulation method
  • Fastener load-deformation curve numerical simulation method

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Embodiment

[0025] The length L of the upper plate A and the lower plate B is 37.5mm, and the distance L between their ends and the fasteners 1 =12.5mm, the lengths of backing plate A and backing plate B are L respectively 2 =10.0mm, L 3 =17.5mm; the length of backing plate C and backing plate D are both L 4 = 5.0 mm, width w = 20 mm for all panels. The grade of the fastener is GB867-67, and the diameter is φ=3mm.

[0026] Upper plate A thickness t 1 =1.8mm, the thickness of lower board B is t 2 =1.0mm, the thickness of backing plate A is 2.0mm, and the thickness of backing plates B, C, and D is 1.0mm.

[0027] The material of the upper and lower plates and fasteners is Ly12-CZ aluminum alloy, and the yield strength of the material is σ cy =427.8MPa, material elastic modulus E=77160MPa, material strengthening modulus E tan =11.2MPa, ultimate strength σ tu =539.6MPa, Poisson's ratio μ=0.305,

[0028] The finite element simulation model is realized according to step 2.

[0029] A ...

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Abstract

The invention belongs to the field of aviation strength test numerical simulation, and particularly relates to a fastener load-deformation curve numerical simulation method comprising the steps of: abstracting a mechanical model according to an actual structure containing a fastener, forming a finite element numerical simulation model, and carrying out simulated analysis. According to the method disclosed by the invention, the numerical simulation method of a rivet load-deformation curve is established, and the fastener load-deformation curve is obtained through the numerical simulation analysis; the simple numerical simulating calculation is adopted to replace a test, and the fastener load-deformation curve satisfying the engineering requirements is obtained under the circumstance that the precision is not reduced; the simulated analysis method is simple, and the computational efficiency is high; the distribution bottleneck of precisely confirming fastener strength in an engineering structural analysis is solved, and the technical support is provided for engineers in adopting a commercial finite element software to analyze the riveted structure ultimate bearing capacity; the research and development progress of an airplane structure is accelerated, and the research and development costs of a new airplane are saved.

Description

technical field [0001] The invention belongs to the field of numerical simulation of aviation strength tests, and in particular relates to a numerical simulation method of load-deformation curves of fasteners. Background technique [0002] For the calculation of the load distribution of aircraft riveted structure fasteners, in addition to the conventional finite element analysis method and engineering analysis method, a finite element non-linear method based on the fastener deformation test curve (referred to as p-δ test curve) has been developed in engineering. Linear analysis technology, which uses the combination of fastener deformation data and nonlinear finite element to determine the load distribution of fasteners. During analysis, the fastener deformation data is placed in the model, and then the finite element nonlinear solution function is used to obtain The load distributed by the individual fasteners of a riveted structure. The advantage of this method is: high c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 吴存利段世慧
Owner CHINA AIRPLANT STRENGTH RES INST
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