System and method for testing high-temperature mechanical property-temperature rise rate correlation parameters of composite material

Abstract

The invention relates to a system and a method for testing high-temperature mechanical property-temperature rise rate correlation parameters of a composite material, which overcomes the defects of slow temperature rise rate, inconstant temperature rise rate, small test temperature range and the like of the traditional test system based on a laser double-side irradiation heating mode. The system comprises a laser, a micro lens array, a collimating lens, a diaphragm, a total reflector, a temperature measuring device, a temperature control servo system and a universal testing machine. The laser double-side irradiation is adopted to heat the test piece, the temperature measuring device is used for testing the temperature of the surface of the test piece, temperature data are output to the temperature control servo system in a current signal mode, and the temperature control servo system controls the current increase or decrease of the laser through calculation to realize the adjustment ofthe output power of the laser.

Description

technical field [0001] The invention belongs to the field of mechanical testing, and relates to a testing system and method for high-temperature mechanical properties of composite materials-heating rate correlation parameters. Background technique [0002] Composite materials have been widely used in the aerospace field because of their excellent specific strength and specific stiffness. Such materials often work in extreme environments with high temperature and high rate of rise. For example, composite materials on hypersonic aircraft will be instantly heated to 1200°C when performing tasks. Therefore, the high-temperature mechanical properties of composite materials at high heating rates have received extensive attention from researchers. [0003] At present, the high-temperature mechanical performance test of insulating composite materials is generally carried out by heating in a heating furnace. However, although this heating method can realize the mechanical performanc...

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Problems solved by technology

[0006] In order to solve the technical problems existing in the background technology, the present invention provides a composite material high temperature mechanical properties-heating rate correlation parameter testing system and method, which overcomes the existing testing system based on double-sided laser irradiation heating There are defects such as slow heating rate, unstable heating rate, and small test temperature range

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