Measuring Young modulus of a metal wire by a laser guide light path

Abstract

Young modulus of a material is measured by observing the relationship of the positive strain of an object along with the change of controllable external force. Common methods include a stretching method and a bending method. For metal wires and other linear materials, the stretching method is most convenient. Equipment appearing on the market is expensive or inconvenient to adjust, and the invention aims to design a simple device for measuring the Young modulus of a metal wire through an optical lever in cooperation with telescope reading by means of a stretching method. According to the invention, the preparation process time for observing the scale reading in the earlier stage is shortened, so that the preparation process is simpler and easier. In order to achieve the purpose, the following technical scheme is adopted in the invention: a device schematic diagram is shown in Figure 1. An arc-shaped groove is introduced into an optical lever of a bracket platform, so that the optical lever can rotate horizontally and stably; a laser is used for guiding optical path adjustment, near-end adjustment is changed into far-end adjustment, the laser is introduced, and the position of an optical lever is adjusted in an auxiliary mode; a scale capable of moving horizontally is introduced, so that the scale can move to the center of the view of a telescope more easily.

Description

technical field [0001] The invention relates to the field of experiment technology, in particular to measuring the Young's modulus of a steel wire by a stretching method. Background technique [0002] The Young's modulus of the material is measured by observing the relationship between the normal strain of the object and the change of the controllable external force, which reflects the basic properties of the material deformation. Common methods include stretching and bending. For linear materials such as wire, the stretching method is most convenient. Fix one section of the wire, stretch the other end, observe the change of the length of the wire, and calculate the Young's modulus of the material. At present, there are many devices on the market for measuring the Young's modulus of metal wires by the pulling method. For example, a device that can directly read Young's modulus by using a tension sensor and electronic extended counting, although the optical lever and the r...

AI Technical Summary

Problems solved by technology

This leads to unclear readings of the observed scale, the opposite object appears in the field of vision, or the scale of the opposite operating device is observed and mistakenly believed that the sensed scale is one's own.

Therefore, time-consuming and error-prone will greatly reduce the teaching significance of the tensile method to measure Young's modulus experiment

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