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Simulation method for machining deformation of carbon-fiber-reinforced resin matrix composite

A technology for reinforcing resin matrix and composite materials, which can be used in special data processing applications, instruments, electrical digital data processing, etc., and can solve the problems of rarely reported processing deformation of composite materials

Inactive Publication Date: 2013-09-11
SHANGHAI AIRCRAFT MFG +1
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Problems solved by technology

At present, scholars at home and abroad have conducted extensive and in-depth research on the processing deformation of metals (especially aluminum alloys), but there are few reports on the processing deformation of composite materials.

Method used

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  • Simulation method for machining deformation of carbon-fiber-reinforced resin matrix composite
  • Simulation method for machining deformation of carbon-fiber-reinforced resin matrix composite
  • Simulation method for machining deformation of carbon-fiber-reinforced resin matrix composite

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings.

[0023] First of all, it needs to be explained that the simulation method of the present invention adopts the method of life-and-death unit to kill the unit that needs to be removed in machining. The so-called "killing" unit does not really delete the unit from the model, but Its stiffness matrix is ​​multiplied by a small factor. The default value of the factor is generally 10 -6 . At this time, it is approximately considered that the stiffness matrix of the element is 0, then the stress vector of the element will also become 0. Therefore, when using the finite element method to simulate the removal of composite materials, the removal of elements can be equivalent to setting the elastic modulus of elements to 0. This is the theoretical basis for simulating the removal of composite materials by the birth-death element method.

[0024] For c...

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Abstract

The invention provides a simulation method for machining deformation of carbon-fiber-reinforced resin matrix composite. The method includes: a, inputting modeling parameters in ANSYS software to build a geometric model; b, meshing the geometric model built in step a by a solid 185 unit, building a finite element model, and limiting the finite element model; c, simulating an autoclave process, calculating a solidification deformation value of the composite, and extracting a stress and strain distribution cloud graph; d, simulating a composite machining process by a method of killing or activating element to obtain machining deformation of the machined composite; and e, calculating the machining deformation value of the machined composite. The method has the advantages that simulation of accurate deformation prediction for the machining deformation of the carbon-fiber-reinforced resin matrix composite is realized, and the practical problems in composites engineering application are solved. The method is simple to operate and convenient to use. The software platform ANSYS is used, so that the method is well compatible and is convenient for technicians to master and use.

Description

technical field [0001] The invention relates to a finite element simulation calculation method, in particular to a simulation analysis of processing deformation of a carbon fiber reinforced resin matrix composite material based on a life-death element method. Background technique [0002] Carbon fiber reinforced resin matrix composites (CFRP) are a series of high-performance composite materials prepared by advanced composite molding and processing methods with resin as the matrix and carbon fiber as the reinforcement. As one of the most important branches of advanced composite materials, carbon fiber reinforced resin matrix composites have unique advantages such as high specific strength and specific modulus, and good designability. Class composite materials. [0003] The autoclave process is an important method for manufacturing carbon fiber reinforced resin matrix composites, and it is widely used in aerospace and other fields. Due to the anisotropy of the composite mate...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 贾丽杰刘凯刘卫平叶金蕊李志远晏冬秀张博明徐少晨李会民王旭王长春魏冉苏佳智邵严
Owner SHANGHAI AIRCRAFT MFG
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