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Method for predicting curing deformation rebound angle of L-shaped composite material workpiece

A composite material and curing deformation technology, which is applied in design optimization/simulation, instrumentation, geometric CAD, etc., can solve problems such as the inability to accurately predict the curing springback deformation, and the inability to establish a prediction model for the curing deformation springback angle

Active Publication Date: 2021-08-06
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for L-shaped composite materials, it is impossible to establish a prediction model for the springback angle of curing deformation under any geometric structure parameters, and it is impossible to accurately predict the curing springback deformation of L-shaped composite parts under any geometric structure parameters.

Method used

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  • Method for predicting curing deformation rebound angle of L-shaped composite material workpiece
  • Method for predicting curing deformation rebound angle of L-shaped composite material workpiece
  • Method for predicting curing deformation rebound angle of L-shaped composite material workpiece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for predicting the rebound angle of solidified deformation of L-shaped composite material parts, comprising the following steps:

[0035] a. Model establishment

[0036] Construct the model surface in the graphics processing software, and assign values ​​to the characteristic structure variables of the model. The characteristic structure variables include the radius of curvature of the R zone, the opening angle of the R zone, the thickness of the laminate and the length of the flat plate regions on both sides, and then import the model surface into the Finite element processing software, and mesh division, boundary constraints and material layup settings;

[0037] b. Finite element simulation calculation

[0038] In the finite element processing software, the simulation calculation of the curing process is carried out according to the preset curing deformation subroutine;

[0039] c. Measurement of deformation springback angle

[0040] Use the same standard ...

Embodiment 2

[0044] A method for predicting the rebound angle of solidified deformation of L-shaped composite material parts, comprising the following steps:

[0045] a. Model establishment

[0046] Construct the model surface in the graphics processing software, and assign values ​​to the characteristic structure variables of the model. The characteristic structure variables include the radius of curvature of the R zone, the opening angle of the R zone, the thickness of the laminate and the length of the flat plate regions on both sides, and then import the model surface into the Finite element processing software, and mesh division, boundary constraints and material layup settings;

[0047] b. Finite element simulation calculation

[0048] In the finite element processing software, the simulation calculation of the curing process is carried out according to the preset curing deformation subroutine;

[0049] c. Measurement of deformation springback angle

[0050] Use the same standard ...

Embodiment 3

[0055] A method for predicting the rebound angle of solidified deformation of L-shaped composite material parts, comprising the following steps:

[0056] a. Model establishment

[0057] Construct the model surface in the graphics processing software, and assign values ​​to the characteristic structure variables of the model. The characteristic structure variables include the radius of curvature of the R zone, the opening angle of the R zone, the thickness of the laminate and the length of the flat plate regions on both sides, and then import the model surface into the Finite element processing software, and mesh division, boundary constraints and material layup settings;

[0058] b. Finite element simulation calculation

[0059] In the finite element processing software, the simulation calculation of the curing process is carried out according to the preset curing deformation subroutine;

[0060] c. Measurement of deformation springback angle

[0061] Use the same standard to...

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Abstract

The invention discloses a method for predicting a curing deformation rebound angle of an L-shaped composite material workpiece, which belongs to the technical field of finite element calculation of composite materials, and is characterized by comprising the following steps of: a, model establishment: constructing a model profile in graphic processing software, and assigning a value to the feature structure variable of a model, importing the molded surface of the model into finite element processing software, and carrying out grid division, boundary constraint and material laying layer setting; b, performing finite element simulation calculation; c, measuring a deformation rebound angle; d, generating a prediction model. According to the method, the geometric model of multiple groups of continuous variables is established, finite element simulation calculation is carried out through feature assignment, and finally the curing deformation springback angle prediction model under any geometric structure parameter is established, so that the curing springback deformation condition of the L-shaped composite material part under any geometric structure parameter can be accurately predicted.

Description

technical field [0001] The invention relates to the technical field of finite element calculation of composite materials, in particular to a method for predicting the springback angle of solidified deformation of L-shaped composite material parts. Background technique [0002] The curing deformation of composite materials is the most important factor that causes the assembly fit to be out of tolerance, so the designer hopes to predict the curing deformation of the part in advance before the part is manufactured, and then optimize the structure or make a reasonable tolerance allocation. At present, the main method to predict the curing deformation of composite materials is to realize it through finite element simulation calculation. The calculation results of this method are relatively accurate, and there are clear physical models to support it. The whole process of curing can be disassembled and analyzed. However, the modeling process of this method is complicated. Whenever ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F30/10G06F113/26
CPCG06F30/23G06F30/10G06F2113/26Y02T90/00
Inventor 黄海超程勇赵文琛龚家谦
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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