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Experiment device and method utilizing simple resonance vibration to measure Young modulus of metal wire

A technology of simple harmonic vibration and Young's modulus, applied in the direction of applying repeated force/pulsation force to test the strength of materials, etc., can solve the problems that affect the accuracy of measurement results, the difficulty of telescope adjustment, and many precautions, so as to cultivate innovation The effect of spirituality, convenient observation, labor saving, and broadening the mind

Inactive Publication Date: 2016-10-26
田凯
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] First, the Young's modulus of metal wire is usually measured by static stretching method, and the principle is relatively simple
[0006] Second, according to the optical lever amplification principle to measure the tiny elongation of the metal wire, the adjustment of the telescope is relatively difficult, and there are many precautions, and it is very easy to get tired and make mistakes in the data when observing and measuring directly with the telescope through the human eye. , affecting the accuracy of the measurement results

Method used

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  • Experiment device and method utilizing simple resonance vibration to measure Young modulus of metal wire
  • Experiment device and method utilizing simple resonance vibration to measure Young modulus of metal wire
  • Experiment device and method utilizing simple resonance vibration to measure Young modulus of metal wire

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Embodiment Construction

[0036]In the figure, a vertical support 2 is set at one end of the test bench 18, and an inclined support 6 with a pulley on the top is set at the other end. A chuck 1 is arranged on the vertical support 2, and the chuck 1 can move along the vertical support 2. To change the position, one end of the metal wire 5 is connected to the chuck 1, and the other end is connected to the iron block 7 across the pulley on the inclined bracket 6 with a pulley on the top. A positioning marker point 4 . The electromagnet device 19 is used to apply a pulling force to the metal wire 5 by acting on the iron block 7 through magnetic force, and then release it, so that the iron block 7 can perform simple harmonic vibration under the action of the metal wire 5, and the working current adjustment knob 20 of the electromagnet device can be used. Adjust the tension. The reading microscope 17 is set on the test bench 18, so that the positioning marking point 4 on the wire 5 is just above the stage 3...

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Abstract

The invention discloses an experiment device and method utilizing simple resonance vibration to measure the Young modulus of a metal wire, relates to a Young modulus measuring device and method, and aims to solve the problems that in the conventional university physical experiments, the experiment principle for measuring metal wire Young modulus is single and abstract, and the telescope is hard to adjust. One end of an experiment table is provided with a vertical support, the other end is provided with an inclined support; a clamping head is arranged on the vertical support, one end of a metal wire is connected to the clamping head, the other end strides over a pulley and is connected to an iron block; an electromagnet device is arranged under the iron block; a positioning identification point is arranged on the metal wire; a scale microscope is arranged on the experiment table; and a CCD sensor is arranged in front of the eyepiece. According to the method, through a display, a second chronograph is used to measure the period of the positioning identification point that performs simple resonance vibration, namely the period of metal wire spring oscillator that carries out simple resonance vibration, and finally the period is substituted into a formula to calculate the Young modulus of the metal wire. The provided method is suitable for measuring the Young modulus of a metal wire.

Description

technical field [0001] The invention relates to a university physics experiment device, in particular to an experiment device and method for measuring the Young's modulus of a metal wire by simple harmonic vibration. Background technique [0002] The change in shape of a solid under the action of an external force is called deformation. It can be divided into elastic deformation and normative deformation. The deformation that an object can completely return to its original shape after the external force is removed is called elastic deformation. If the external force applied to the object is too large, so that after the external force is removed, the object cannot completely return to its original shape, leaving residual deformation, which is called normative deformation. In this experiment, only elastic deformation is studied. Therefore, the magnitude of the external force should be controlled to ensure that the object can return to its original shape after the external f...

Claims

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Application Information

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IPC IPC(8): G01N3/38
CPCG01N3/38
Inventor 田凯王志刚王博王宁王丽霞
Owner 田凯
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