Micro-deformation demonstrator and method of use thereof

Abstract

The invention relates to a small deformation demonstrating instrument and an application method thereof. The small deformation demonstrating instrument comprises a glass bottle and a slim tube, the slim tube is inserted in the glass bottle, one end of the slim tube extends out of the glass bottle, the slim tube is in communication with the glass bottle and is vertically disposed, the glass bottle is filled with water, and a half of the slim tube is filled with water. The small deformation demonstrating instrument further comprises two clamps, a connecting shaft, two long rods, vertical columns and a ruler, the two clamps are fixed to the two long rods through the connecting shaft in a crossing mode, the two clamps, the connecting shaft and the two long rods are combined to form a scissor shape, the length of the long rods is larger than that of the clamps, the two clamps are clamped on the side face of the glass bottle in a matched mode, each vertical column is arranged at the end, away from the corresponding clamp, of the corresponding long rod, the vertical columns are perpendicular to the long rods in installation, the two vertical columns are parallel to each other, the ruler is arranged between the two vertical columns and is perpendicular to the two vertical columns, one end of the ruler is fixed to one vertical column, and the other end of the ruler penetrates through the other vertical column and is connected with the other vertical column in a sliding fit mode. The steps of the application method of the small deformation demonstrating instrument are simple.

Description

technical field [0001] The invention relates to the field of physical experiment equipment, in particular to a micro-deformation demonstrator and a using method thereof. Background technique [0002] In senior high school physics textbooks, when it comes to the small deformation of physics, it is described in this way that under the action of force, some deformations can be seen directly, and some deformations are not obvious or even invisible. But in fact, there is micro-deformation, and its small changes can only be detected through a special method. This method is to try to magnify the small deformation of a hard object, so that the change can be clearly observed by the naked eye. [0003] In the textbook teaching examples, the design method is as follows: a glass bottle filled with water is set, and a thin tube is arranged on the glass bottle, and the bottom of the thin tube is submerged in the water in the glass bottle. When the glass bottle is pressed, the water level...

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Problems solved by technology

[0004] But this method, first, when pressing with hands, the temperature in the hands will be transmitted to the glass bottle, so that the internal water will expand when heated, and the slight expansion will cause the water level in the thin tube to change, making it difficult to judge Whether the water level in the narrow tube changes due to micro-deformation of the glass bottle or the temperature of the hand, which increases the unreliability of the test;

[0005] Second, this method cannot effectively measure the specific value of micro-deformation, it can only let students know that the glass bottle has micro-deformation

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