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Prediction method for bimetal composite material strength

A composite material and prediction method technology, applied in the direction of analyzing materials, strength characteristics, measuring devices, etc., can solve problems such as the inability to accurately reflect the true strength, the deviation between the predicted value and the test value of the strength of bimetal composite materials, and reduce the Test volume, wide applicability, cost-saving effect

Inactive Publication Date: 2019-03-12
GUANGDONG INST OF MATERIALS & PROCESSING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, a large number of literatures use the mixing rule to predict the strength of bimetallic composites. However, the strengths of the two components in these literatures are obtained by testing samples prepared by the same process as the composite materials, rather than directly from the composite materials. This method of testing mechanical properties cannot accurately reflect the true strength of the two components in the composite material, resulting in a large deviation between the predicted value and the experimental value of the strength of the bimetallic composite material.

Method used

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  • Prediction method for bimetal composite material strength
  • Prediction method for bimetal composite material strength
  • Prediction method for bimetal composite material strength

Examples

Experimental program
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Effect test

Embodiment 1

[0020] The invention provides a method for predicting the strength of a bimetallic composite material, comprising the steps of:

[0021] (1) Use wire cutting to directly cut a magnesium component bar sample with a diameter of 6mm and an aluminum component bar sample with a diameter of 5mm from a Mg / Al composite bar (20mm in diameter, of which the aluminum core diameter is 6mm). For mechanical performance testing, the schematic diagram of sample cutting is as follows: figure 1 shown;

[0022] (2) Test the mechanical properties of the magnesium component and aluminum component samples cut in step (1) respectively, and obtain the stress-strain curve and strength σ of the magnesium component and aluminum component 1 , σ 2 , please refer to the stress-strain curve of the two components figure 2 ;

[0023] (3) Carry out SEM test analysis to the Mg / Al composite sample in step (1), obtain the volume fraction V that the magnesium component and the aluminum component occupy in the ...

Embodiment 2

[0026] The invention provides a method for predicting the strength of a bimetallic composite material, comprising the steps of:

[0027] (1) Use wire cutting to directly cut aluminum components with a diameter of 5 mm and copper components with a diameter of 5 mm from the Al / Cu composite rod (18 mm in diameter, with a copper core diameter of 6 mm) for mechanical performance testing ;

[0028] (2) Test the mechanical properties of the aluminum component and copper component samples cut in step (1) respectively, and obtain the stress-strain curve and strength σ of the aluminum component and copper component 1 , σ 2 ;

[0029] (3) carry out SEM test analysis to the Al / Cu composite sample in step (1), obtain the volume fraction V that aluminum component and copper component occupy in Al / Cu composite sample 1 and V 2 ;

[0030] (4) Substitute the strength and volume fraction of aluminum and copper components obtained in step (2) and step (3) into the mixing law formula σ c = ...

Embodiment 3

[0032] The invention provides a method for predicting the strength of a bimetallic composite material, comprising the steps of:

[0033] (1) Use wire cutting to directly cut aluminum components with a width of 10mm and a thickness of 5mm from the Al / Steel composite plate (the width and thickness are 30mm and 15mm, respectively, and the width and thickness of the aluminum layer are 30mm and 8mm). Steel component samples with a thickness of 10mm and a thickness of 5mm are used for mechanical performance testing;

[0034] (2) Test the mechanical properties of the aluminum component and steel component samples cut in step (1) respectively, and obtain the stress-strain curve and strength σ of the aluminum component and steel component 1 , σ 2 ;

[0035] (3) The Al / Steel composite sample in step (1) is carried out SEM test analysis, obtains the volume fraction V that the aluminum component and the steel component occupy in the Al / Steel composite sample 1 and V 2 ;

[0036] (4) ...

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Abstract

The invention relates to prediction method for the bimetal composite material strength and belongs to the technical field of composite material mechanical performance test. The prediction method comprises the following steps of directly testing the mechanical performance of two components in a bimetal composite material to obtain strengths sigma 1 and sigma 2 of the two components; then performingscanning test analysis on the bimetal composite material to obtain volume fractions V1 and V2 of two components in a composite sample respectively; and finally, utilizing a mixing rule formula sigmac being equal to sigma 1*V1 plus sigma 2*V2 to predict the strength sigma c of the bimetal composite material. The method provided by the invention can realize accurate prediction to the strength of the bimetal composite material, has the characteristics of high accuracy and wide applicability, lowers the test dose at the same time and greatly saves the cost.

Description

technical field [0001] The invention relates to the technical field of mechanical performance testing of composite materials, and in particular to a method for predicting the strength of bimetallic composite materials. Background technique [0002] Bimetallic composite material is a new type of material with combined properties that uses composite technology to achieve a firm metallurgical or chemical combination of two metals with different properties at the interface. Compared with single metal materials, bimetallic composite materials combine the advantages of two different metals and can effectively coordinate the mechanical properties of composite materials. At present, they have been widely used in aviation, petroleum, chemical industry, shipbuilding, automobiles, electronics, etc. , atomic energy and other industrial fields. In bimetallic composites, an in-depth study of the strength relationship between the composite and the two components helps to predict the mecha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/00
CPCG01N3/00G01N2203/0218G01N2203/0266G01N2203/0282G01N2203/0682
Inventor 冯波冯晓伟郑开宏王娟路建宁刘天龙王海艳
Owner GUANGDONG INST OF MATERIALS & PROCESSING
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