Adiabatic shearing failure temperature online detection method and system based on infrared thermal imaging

Abstract

The invention provides an online detection method and system based on infrared thermal imaging. The system comprises a sample loading device, an infrared optical imaging system, an infrared detection device, a multiplexing electric signal processing system and a data acquisition system, wherein the sample loading device is used for loading samples and subjecting to shock compression failure; the infrared optical imaging system is used for collecting the sample distorted radiation light and imaging in the infrared detection device; the infrared detection device converts a received optical signal into an electrical signal for detecting the temperature variation of the shock compression test; the multiplexing electric signal processing system processes the electrical signal which is converted by the infrared detection device, and outputs cushion and multipath transmission, and finally, an image is formed; and the data acquisition system acquires data. The system solves the problem of online testing the temperatures of the formation and development stages of an adiabatic shear band when a metal material or component is under the action of high strain rate, the spatial and time resolutions of the test system are improved through the infrared detection device and the high-speed data acquisition system which are arranged into an array, so the acquired data which is based on infrared imaging can satisfy the use requirements, and the research on the development process temperature characteristic of the adiabatic shear band is promoted.

Description

technical field [0001] The invention relates to the field of infrared thermal imaging, and in particular provides a real-time temperature measurement method for the formation and development of adiabatic shear bands under the action of high-speed impact, erosion, etc., which is suitable for titanium alloys, tungsten alloys, etc. The measurement of the internal deformation temperature of a material or component under action. Background technique [0002] Titanium alloys, tungsten alloys, high-strength steels and other materials are subjected to high-strain rate deformation processes involving impact loads such as high-speed impact, penetration, erosion, and explosive recombination. Thermal-mechanical coupling and localized thermal stresses occur when materials are deformed at strain rates. Viscoplastic instability phenomenon, in which adiabatic shear band (Adiabatic Shear Band, ASB) is a unique micro-damage phenomenon. level), most of the plastic work is converted into heat ...

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Problems solved by technology

However, the above-mentioned macroscopic and microscopic research methods in the prior art cannot obtain the temperature change history of the formation and development stages of the adiabatic shear band

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