Temperature characteristic testing apparatus for Young modulus of metal wire and testing method thereof

Abstract

The invention relates to a testing apparatus for a metal material, and particularly relates to a temperature characteristic testing apparatus for a Young modulus of a metal wire and a testing method thereof. The temperature characteristic testing apparatus comprises a fixing rack, wherein one end of the metal wire is fixedly arranged on one end of the fixing rack, while the other end of the metal wire is connected with an electronic portable scale; the electronic portable scale is connected with the other end of the fixing rack; the metal wire is stressed to be tightened; in an experimental area for the metal wire, the edges of the experimental area are provided with one digital microscope respectively; the digital microscopes are connected with a computer; a steel rule is also mounted in the experimental area; a probe of a two-channel digital thermometer is connected to the middle of the experimental area for the metal wire; the outer sides of two ends of the experimental area for the metal wire are connected onto a low-frequency alternating-current transformer respectively; the low-frequency alternating-current transformer is also connected with a power supply; a resistance changing box is connected in series between the low-frequency alternating-current transformer and the power supply. According to the temperature characteristic testing apparatus and the testing method thereof, a heating method of realizing impedance conversion by using the alternating-current transformer is provided; the temperature change of the metal wire is achieved by utilizing a current generating circuit; a numerical value which is accurately measured is obtained.

Description

technical field [0001] The invention relates to a metal material test device, in particular to a temperature characteristic test device and a test method for the Young's modulus of a metal wire. Background technique [0002] Young's modulus is often used to study the mechanical properties of metal materials, nanomaterials, optical fiber materials, semiconductors and other materials. The determination of Young's modulus plays an important role and is widely used in various fields such as geology and biomechanics. [0003] The heating of metals can be divided into three categories. The first type is mainly through the combustion of fuel, which then heats the metal. The second type is high-energy-density energy heating. This method uses a large power density to heat the surface of the metal. The heating time is extremely short and the power density is very high. The third type is electric heating, which uses electricity as a heat source, and converts electric energy into heat...

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Problems solved by technology

However, due to the low resistance of metal wires such as strings, it is difficult to feed effective electrical power into them to heat and con...

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