The principle analysis of the electronic universal testing machine This paper explains the importance of correctly obtaining the yield point of the material by analyzing the meaning of the yield point of the material. The reasons for the error in the yield point and the solutions and the matters needing attention should be analyzed. It has certain reference value for the selection, design and use of the testing machine.
 Elastic deformation plastic deformation yield band Any material will be deformed when subjected to external forces. In the initial stage of the force, the deformation is generally linear with the external force received. At this time, if the external force disappears, the deformation of the material will disappear and the original state will be restored. This stage is usually called the elastic stage. The Hooke's Law in Learning is the basic law describing this characteristic. However, when the external force is increased to a certain extent, the deformation and the external force will no longer be linearly proportional. At this time, when the external force disappears, the deformation of the material will not completely disappear, and the external dimension will not be fully restored to the original state. The stage is called the plastic deformation stage.
All products and equipment are made up of materials of different properties. They are subject to various external forces during use, and naturally they will produce various deformations, but this deformation must be limited to elasticity. Within the scope, otherwise the shape of the product will change permanently, affecting the continued use. The shape of the equipment will also change. If the accuracy of the processed parts is lowered, the quality of the parts will be scrapped and a major quality accident will occur. So how to ensure that the deformation is in the elastic range? From the above analysis, the deformation of the known material is divided into two stages: elastic deformation and plastic deformation. Just find out the experimental and theoretical analysis of the mechanical properties of the known materials. With the turning point of the two points of yield point and non-proportional stress, the engineering designer can ensure the reliable operation of the products and equipment. Http://news.chinawj.com.cn Submission:
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