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Test method and test tooling for dome-shaped brittle material

A technology of brittle materials and test methods, which is used in the analysis of materials, the use of stable tension/pressure to test the strength of materials, and the measurement device. The effect of fixed functions

Inactive Publication Date: 2019-02-15
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the initiation and development of cracks, a high-speed camera is a better observation method, but due to the limited memory of the high-speed camera, it cannot be collected for a long time, and how to set the trigger method has become a problem

Method used

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  • Test method and test tooling for dome-shaped brittle material
  • Test method and test tooling for dome-shaped brittle material
  • Test method and test tooling for dome-shaped brittle material

Examples

Experimental program
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Embodiment

[0046] According to the above-mentioned embodiment, design an arched test sample 1 with an outer diameter of 76.2 mm, an inner diameter of 38.1 mm, and a height of 12.7 mm. The test sample 1 is placed on the bottom plate 6 and its lateral direction is realized by the limit block 9. constraint.

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Abstract

The invention discloses a test method for a dome-shaped brittle material. The test method comprises a preparation step and an experiment step, wherein for the preparation step, an acoustic emission inspection device and an oscilloscope are erected, an acoustic emission probe of the acoustic emission inspection device is fixed on a test sample, and a high-speed camera is triggered by the acoustic emission inspection device and the oscilloscope in sequence to collect image data. Under cooperation of the acoustic emission inspection device and the oscilloscope, when a material testing machine applies load to a critical point of sample damage in a testing process, the high-speed camera of a scattered stain test system can accurately monitor the process from initiation and development to damageof cracks of the dome-shaped sample, and accurate and reliable support is provided for research on numerical simulation test, constitutive relation, failure criterion, size effect and failure mechanism of the brittle material.

Description

technical field [0001] The invention relates to the technical field of performance testing of brittle materials, in particular to a performance test of circular arched brittle materials. Background technique [0002] The test method for brittle materials is generally to apply loads to brittle material samples through a material testing machine, and use different restraint forms for brittle material samples, so that the brittle material samples are in different stress states and finally in different failure modes (tensile failure, shear failure, confining pressure failure, etc.), and then obtain the stress-strain relationship, failure threshold and failure mode of the material under different stress states, and then evaluate the constitutive relationship, failure criterion and size effect of the material on this basis. [0003] The digital speckle measurement method is based on the digital image correlation method, and the displacement field and the strain field are obtained ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01N3/06
CPCG01N3/06G01N3/068G01N3/08G01N2203/0019G01N2203/0062G01N2203/0064G01N2203/0066G01N2203/0067G01N2203/0647G01N2203/0658
Inventor 蓝林钢付涛甘海啸周红萍唐明峰温茂萍
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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