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Device and method for measuring elastic modulus of metal materials

A technology of elastic modulus and metal materials, applied in the direction of applying stable tension/compression to test the strength of materials, etc., can solve problems such as the existing literature that has not found the closest invention

Active Publication Date: 2017-02-08
桐乡市恒达经编股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] After retrieving existing documents at home and abroad, no existing documents closest to the present invention have been found

Method used

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  • Device and method for measuring elastic modulus of metal materials
  • Device and method for measuring elastic modulus of metal materials
  • Device and method for measuring elastic modulus of metal materials

Examples

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Effect test

Embodiment 1

[0031] Apparatus for Measuring Elastic Modulus of Carbon Steel Wire

[0032] exist figure 1 Among them, the device for measuring the elastic modulus of carbon steel wire includes brackets, weights, trays, upper chucks, lower chucks, measuring clips, and QJ44 DC double-arm bridges, with a range of 0-25mm and a spiral micrometer with a range of 0-2000mm tape measure, also includes conductivity coefficient ρ=9.70×10 -8 Ω·m, carbon steel wire to be tested with a diameter of 0.635mm, the length of the carbon steel wire is about 1100mm, and the detection section l is set to 900mm; figure 2 Among them, the outer profile of the bracket in the device for measuring the elastic modulus of carbon steel wire is 2000mm high and 200mm wide; the support has three feet, each foot is equipped with a support screw, the material of the support is cast iron, and the material of the support screw is 45 steel. The bottom plate and the support are connected with screws and fixed on the support. Th...

Embodiment 2

[0043] Device for measuring elastic modulus of copper wire

[0044] Measuring the electrical conductivity of the copper wire to be measured in the copper wire elastic modulus device ρ=1.72×10 -8 Ω m, the diameter is 1.362mm, the length is 1200mm, the detection section l is set to 1000mm, and two wires with a cross-sectional area of ​​2.5 square millimeters and a length of 1100mm are used, and one end of one wire is connected from a measuring clip with a diameter of 3.5 mm through the hole, screw one end of the wire to the curved surface of the measuring clip, and then insert one end of the other wire through the hole with a diameter of 3.5mm in the other measuring clip, screw it Put the screw into the one end of the wire and stick it to the arc surface of the hole of the measuring clip, and connect the other ends of the two wires to the P1 and P2 potential terminals of the DC double-arm bridge respectively; use two 2.5 square millimeter, 60mm long wires , connect the two ends...

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Abstract

The invention relates to a device and a method for measuring the elasticity modulus of a metallic material. The device comprises a bracket, weights, a tray, an upper chuck, a lower chuck, a measuring clamp, a direct-current double-arm bridge, a screw-thread micrometer, a measuring tape and a metal wire to be measured. The measuring method comprises the following steps: deriving a new formula for solving the elasticity modulus of the metallic material; keeping the measuring distance of the metal wire to be unchanged; increasing or decreasing same load for the metal wire step by step; measuring data of the change of the corresponding load at a detection section of the metal wire along with the micro change of resistance of the metal wire by using the direct-current double-arm bridge in every time, measuring data of the change of corresponding load at the detection section of the metal wire along with micro change of resistance of the metal wire by using the screw-thread micrometer in every time, substituting the data into correlation formulas to solve the elasticity modulus of the metallic material. According to the device and the method, the metal wire to be measured is convenient and quick to clamp, the measuring error is small, and the device and the method are used for researching properties of the metallic material or experiment teaching of mechanics of materials.

Description

technical field [0001] The invention relates to a device and a measuring method for measuring the elastic modulus of metal materials, in particular to a device and a measuring method for measuring the elastic modulus of metal materials with a DC double-arm bridge, which is not only used for comprehensively understanding and studying the properties of metal materials, but also can be used for Experimental teaching of mechanics of materials. Background technique [0002] The change of shape of a solid material under the action of an external force is called "deformation". After a certain limit of internal and external force stops, the deformation disappears completely, which is called "elastic deformation". When the external force is too large, the deformation cannot completely disappear, and the remaining deformation remains, which is called "plastic deformation", that is, the deformation still exists after the external force is withdrawn, which is an irreversible process. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/14
Inventor 戴心锐马玉利
Owner 桐乡市恒达经编股份有限公司
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