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Method for quantitatively analyzing material interface properties by combining non-destructive testing and definite element modelling

A quantitative analysis and non-destructive testing technology, which is applied in the direction of analyzing materials, measuring devices, and material analysis through optical means, can solve problems such as differences in analysis results and unreliable results, and achieve high sensitivity and reliable quantitative values.

Inactive Publication Date: 2009-09-30
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some subtle differences in the establishment of the finite element analysis model and the loading process may cause great differences in the analysis results, resulting in unreliable results.

Method used

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  • Method for quantitatively analyzing material interface properties by combining non-destructive testing and definite element modelling
  • Method for quantitatively analyzing material interface properties by combining non-destructive testing and definite element modelling
  • Method for quantitatively analyzing material interface properties by combining non-destructive testing and definite element modelling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1, the detection of single-bundle carbon fiber reinforced epoxy resin composite material interface

[0035] The matrix material is epoxy resin (bisphenol A type epoxy resin model is E-51, curing agent low molecular weight polyamide resin model is 651, Wuxi Alz Chemical Co., Ltd.), the reinforcement is a single diameter of 7 μm, each bundle 1000 carbon fiber tows with a length of 150 mm (Dalian Xingke Carbon Fiber Co., Ltd.).

[0036] The detection method is carried out according to the following steps:

[0037] 1) Mix the epoxy resin and curing agent according to the mass ratio of 10:3 and pour it into 80×20×2mm 3 Insert a bundle of carbon fibers into the PTFE mold with a thickness of 1mm. Slowly heat up and cure in an oven according to the program: 60°C for 3 hours, 70°C for 3 hours, 80°C for 3 hours, 105°C for 3 hours, and 120°C for 3 hours until a golden yellow translucent sample is obtained. Take the sample out of the mold, spray white paint on the sur...

Embodiment 2

[0041] Embodiment 2, the detection of single-bundle carbon fiber reinforced silicone rubber composite material interface

[0042] Among the selected composite materials, the matrix material is silicone rubber (GN512, vinyl-terminated dimethylsiloxane catalytic addition, Hong Kong Advanced Technology Industries Co., Ltd.), the reinforcement is a single diameter of 7 μm, 1000 per bundle, and the length 150mm carbon fiber tow carbon fiber (Dalian Xingke Carbon Fiber Co., Ltd.).

[0043] The detection method is carried out according to the following steps:

[0044] 1) Silicone gel 5g is poured into 80×20×2mm 3 In the PTFE mold, a bundle of carbon fibers is inserted into it at a thickness of 1mm. Slowly heat up and vulcanize in an oven according to the program: 60°C for 3 hours, 70°C for 3 hours, 80°C for 3 hours, 105°C for 3 hours, and 120°C for 3 hours until a colorless and translucent sample is obtained. Take the sample out of the mold, spray white paint on the surface, and c...

Embodiment 3

[0047] Example 3, detection of carbon fiber sheet reinforced epoxy resin composite material interface

[0048] The matrix material is epoxy resin (bisphenol A type epoxy resin model is E-51, curing agent low molecular weight polyamide resin model is 651, Wuxi Alz Chemical Co., Ltd.), the reinforcement is a single diameter of 7 μm, each bundle 1000 carbon fibers with a length of 150 mm (Dalian Xingke Carbon Fiber Co., Ltd.).

[0049] The detection method is carried out according to the following steps:

[0050] 1) Mix epoxy resin and curing agent evenly at a mass ratio of 10:3 and pour into 80×20×2mm 3 In the PTFE mould, lay the fiber flat by winding, and brush a thin layer of epoxy resin to pre-cure to 100×20×0.2mm 3 After thinning, carefully place it at 1mm thickness. Slowly heat up and cure in an oven according to the program: 60°C for 3 hours, 70°C for 3 hours, 80°C for 3 hours, 105°C for 3 hours, and 120°C for 3 hours until a golden yellow translucent sample is obtained...

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Abstract

The invention relates to a method for quantitatively analyzing material interface properties by combining non-destructive testing and definite element modelling. In the method, by loading a composite material, a non-destructive testing system records a loading variable; and at the same time, a finite element method correspondingly simulates the whole loading process of a test piece according to intrinsic properties, modulus, tensile strength, Poisson ratio and the like of the material so as to find a simulation state corresponding to the non-destructive testing variable and further obtain comprehensive analysis results, including various physical quantities reflecting the material interface properties such as friction coefficient between fibers and a matrix, stress, straining, counterforce and the like, in the simulation state. The non-destructive testing high-precision method verifies partial parameters of finite element analysis, and the finite element analysis provides more comprehensive analysis results. The method has the advantages of high sensitivity, credible quantitative values and no need of damaging an adhesive layer.

Description

technical field [0001] The invention relates to a method for quantitatively analyzing material interface properties, in particular to a method for quantitatively analyzing material interface properties by combining non-destructive testing and finite element simulation. Background technique [0002] With the continuous expansion of the industrial application range of various functional materials, composite materials and other advanced materials, the mechanical behavior of the interface composed of different materials has attracted more and more attention. The joints of various structures and materials, such as the interlayer of composite material laminates, the metal / ceramic joint interface, the joint interface between functional devices and load-bearing components, etc., are very important to the mechanical behavior and even the functional performance of the material or structure as a whole. It is a dominant influence; if the adhesive layer is not well bonded, there will be ...

Claims

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Application Information

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IPC IPC(8): G01N21/00G01B11/16
Inventor 谭帅霞徐坚戴珍张小莉
Owner INST OF CHEM CHINESE ACAD OF SCI
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