Device and method for measuring elasticity modulus of metallic material

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: 2013-11-27
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 elasticity modulus of metallic material
  • Device and method for measuring elasticity modulus of metallic material
  • Device and method for measuring elasticity modulus of metallic material

Examples

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Comparison scheme
Effect test

Embodiment 1

[0031] Device for measuring elastic modulus of carbon steel wire

[0032] in figure 1 In, the device for measuring the elastic modulus of carbon steel wire includes bracket, weight, tray, upper chuck, lower chuck, measuring clamp and QJ44 DC double-arm bridge, with a range of 0-25mm spiral micrometer, and the range is 0-2000mm tape measure, including conductivity coefficient ρ=9.70×10 -8 Ω·m, the carbon steel wire to be tested with a diameter of 0.635mm, the carbon steel wire is about 1100mm long, and the detection section l is set to 900mm; figure 2 In the device for measuring the elastic modulus of carbon steel wire, the outer contour of the support is 2000mm high and 200mm wide; the support has three legs, and each foot end is equipped with a support screw. The support material is cast iron and the support screw material is 45 steel. The bottom plate and the support are connected with screws and fixed on the support. The middle of the bottom plate is equipped with a level. The...

Embodiment 2

[0041] Device for measuring elastic modulus of copper wire

[0042] The conductivity coefficient of the copper wire to be tested in the device for measuring the elastic modulus of copper wire 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. One end of the wire is 3.5 in diameter from a measuring clip Insert the screw into the hole with a diameter of 3.5 mm, screw one end of the wire to the curved surface of the measuring clip, and then pass one end of the other wire through the 3.5mm diameter hole of the other measuring clip, and screw it. Screw one end of the wire and the arc of the measuring clip tightly, and the other ends of the two wires are connected to the P1 and P2 potential terminals of the DC double-arm bridge; use two 2.5 square millimeters, 60mm long wires , Connect the two ends of one wire to the P1 potenti...

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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. It is used for comprehensive understanding and research of the properties of metal materials, and can be used for Experimental teaching of mechanics of materials. Background technique [0002] The shape change of a solid material under the action of external force is called "deformation". After a certain limit of internal and external forces stop, the deformation completely disappears, which is called "elastic deformation". When the external force is too large, the deformation cannot completely disappear, leaving the remaining deformation, which is called "plastic deformation", that is, the deformation still exists after the external force is withdrawn, which is an irreversible process. Gradually increasing the extern...

Claims

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Application Information

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Patent Type & Authority Applications(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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