Abstract
In this paper, a device is introduced to enlarge micro deformation of steel wire by using Moire fringe formed by double grating, and then measure the Young modulus. Since the angle of the double grating in the device is difficult to control accurately, and it is difficult to accurately achieve the desired magnification, we chose to calculate the magnification by measuring the width of the Moire fringe, and then conducted subsequent measurement. The experimental device proposed in this article has a simple structure and low cost, and can be used as a combination of optical and mechanics experiment content for undergraduate students.
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