A Dynamic Temperature Measuring Device in High Temperature Breaking Strength Tensile Test

Abstract

The invention discloses a dynamic temperature measuring device in high-temperature breaking strength tensile test. The dynamic temperature measuring device comprises a cylindrical tensile test piece, a tensile test machine chuck, an infrared radiation array, a temperature measuring thermocouple wire, a thermocouple end temperature measuring point, high-temperature-resisting insulation casing pipes, tension springs, a two-groove crown block, a computer, a high-power phase-shifting voltage controller and a light high-temperature insulating board. The dynamic temperature measuring device can be used in the high-temperature breaking strength tensile test, when the diameter of the cylindrical test piece is continuously reduced and even a great reducing deformation process occurs, the dynamic variation of the temperature on the surface of the cylindrical tensile test piece still can be reliably recorded, the key characteristic parameters such as strength limit of aerospace materials in a variable thermal environment at high speed can be acquired, and important test evidence can be provided for determining the load bearing capacity of the aerospace materials in the fast dynamic thermal environment.

Description

technical field [0001] The invention relates to a dynamic temperature measuring device in a high-temperature fracture strength tensile test, which belongs to the field of high-temperature characteristic tests of metal materials. In the high-temperature tensile test of metal materials, when the diameter of a cylindrical test piece decreases continuously or even shrinks In the process of large deformation, it can also reliably record the dynamic change of the surface temperature of the test piece, which provides an important test method for obtaining key parameters such as the strength limit of aerospace materials in a rapidly time-varying thermal environment. Background technique [0002] At present, the speed of high-speed aircraft such as missiles is getting faster and faster, and the maneuverability is getting stronger and stronger. In order to break through the anti-missile system, the high-speed aircraft will suddenly climb, turn, or adopt a "snake" maneuver to achieve t...

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Problems solved by technology

But, when the thermocouple made by traditional method is set on the cylindrical tensile test piece 1, the temperature measurement point 5 at the end of the thermocouple and the junction of the cylindrical tensile test piece 1 are as follows: figure 2 As shown, there will be a gap, and the temperature measurement error will be caused due to the loose fit

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