Method and device of measuring material thermal shock property

A technology of measuring device and heating device, applied in the direction of measuring device, analytical material, instrument, etc., can solve problems such as damage, and achieve the effect of adding thermal insulation shield and stable and reliable measurement environment

Active Publication Date: 2010-03-10
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, there is no good method in the world to carry out quantitative analysis on the thermal shock behavior of materi

Method used

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  • Method and device of measuring material thermal shock property
  • Method and device of measuring material thermal shock property
  • Method and device of measuring material thermal shock property

Examples

Experimental program
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Embodiment

[0049] Example: The following is an experimental study conducted by us to illustrate a method for measuring the thermal shock behavior of materials and the use process of the device. Material: Ordinary glass slide, we conduct the test in an environment of about 300°C, and the speckle is made by spraying paint. As shown in the figure below, the precise temperature of the glass slide measured by the infrared thermometer when the water droplets started to act is 295°C. The shooting frequency of the high-speed camera is 4000 frames per second. We calculated the displacement changes in the x and y directions in the box area shown in the figure after the action of water droplets for 5.75 milliseconds (the displacement in the figure is in units of pixels, 0.125mm / pixels) .

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Abstract

The invention relates to a method and a device of measuring material thermal shock property, which belongs to the technical field of engineering materials, structural deformation and mechanics experiment. The measuring device comprises an air cushion precision optical platform, a temperature controlled switch, a PID temperature controller, an infrared radiation thermometer, an LED lamp bracket, anLED lamp, an A-frame, a lens, a high speed camera, a computer, a test piece, a thermoelectric pair, alumina ceramics, asbestos wire gauze, a heating furnace, a thermal insulation shield, a burette and a stand. The invention combines heating equipment and an optical photographic apparatus, masterly utilizes a digital image cross-correlation method and provides the method and the device of measuring material thermal shock property. The invention has novel train of thought, compact structure and complete system, and can realize quantitative analysis and measurement on the material thermal shockproperty.

Description

technical field [0001] The invention relates to a method and a device for measuring thermal shock behavior of materials, belonging to the technical fields of engineering materials, structural deformation and mechanical experiments. Background technique [0002] Thermal shock behavior has a wide range of engineering backgrounds, especially in the field of aerospace. When various types of aircraft pass through the atmosphere, they will rub against the air to generate severe thermal shock in an instant. The impact causes the material to generate severe thermal stress in a short period of time, resulting in material damage. The thermal shock resistance of a material depends on the internal thermal stress of the material, and the magnitude of the thermal stress depends on its mechanical and thermal properties. The thermal conductivity and thermal expansion coefficient of the material are very sensitive to temperature. The elastic modulus, strength, etc. will also change greatly....

Claims

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Application Information

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IPC IPC(8): G01N3/60
Inventor 冯雪王翔
Owner TSINGHUA UNIV
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