A method and device for simulating lightning strike damage of composite materials

A composite material and damage simulation technology, applied in computer material science, 3D modeling, instruments, etc., can solve the problem of lack of lightning strike simulation, and achieve the effect of avoiding lightning strike test and reducing cost and test cycle.

Active Publication Date: 2021-10-26
SHOUGANG CORPORATION
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the purpose of the embodiments of the present invention is to provide a lightning strike damage simulation method and device for composite materials, which solves the current lack of lightning strike simulation and simulation, and can be used to simulate the changes in the material properties of composite materials after lightning strikes, avoiding the Real lightning strike test, reducing cost and test cycle

Method used

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  • A method and device for simulating lightning strike damage of composite materials
  • A method and device for simulating lightning strike damage of composite materials
  • A method and device for simulating lightning strike damage of composite materials

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Experimental program
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Embodiment approach

[0095] As an optional implementation manner, the boundary conditions include any one or more of the following:

[0096] Concentrated current, electric potential, displacement control, initial temperature, heat exchange coefficient and radiation coefficient of the composite material.

[0097] As an optional implementation, the method is applied in the software ABAQUS.

[0098] As an optional implementation manner, the calculation module 604 is specifically configured to:

[0099] According to the performance parameters, design a user subroutine for calculating the degree of pyrolysis, wherein the degree of pyrolysis represents the degree of performance attenuation of the composite material; according to the geometric model containing the three-dimensional grid, the performance parameters and A simulation model is obtained for the boundary conditions; a simulation calculation is performed according to the simulation model and the user subroutine to obtain the simulation result....

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Abstract

A method and device for simulating lightning strike damage to composite materials provided by an embodiment of the present invention, wherein the method includes: establishing a two-dimensional geometric model of the composite material, and performing grid division on the geometric model to obtain a geometric model including a two-dimensional grid ; Offset the two-dimensional grid to obtain a geometric model comprising a three-dimensional grid; set performance parameters and boundary conditions related to thermal-electric-structural coupling for the composite material; according to the geometric model comprising a three-dimensional grid , the performance parameters and the boundary conditions to obtain a simulation result characterizing the performance change of the composite material. It solves the problem of lack of lightning strike simulation at present, and can be used to simulate the changes in material properties of composite materials after lightning strikes, avoiding real lightning strike tests, and reducing costs and test cycles.

Description

technical field [0001] The invention relates to the technical field of material testing, in particular to a method and device for simulating lightning strike damage to composite materials. Background technique [0002] The application of aviation composite materials has greatly improved the overall performance of the aircraft, including strength performance, fatigue performance, etc., and while the performance has been improved, the aircraft has also been lightened, reducing energy consumption and flight costs. However, damage to the interior or surface of composite materials can easily lead to a great degradation of the structural strength and stiffness of the material. Lightning strike is one of the main causes of damage. When a strong current hits the composite material after the lightning strike, the heat temperature rises sharply in a short period of time, causing the local strength of the material to degrade, or even burn through and break down. [0003] At present, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G16C60/00G16C20/80G06T17/20
CPCG06T17/20G16C20/80G16C60/00
Inventor 韩龙帅郑学斌王宝川杨建炜姚野金磊李亚东李少博李春光胡开广张伟
Owner SHOUGANG CORPORATION
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