yield
The strength of the reduction point, that is, the drop strength, or the load stress, in the mechanical and material science is defined as a ductile material stress in the elastic limit above the stress and strain ratio of repeated changes in the situation, and then a little increase after the force will Resulting in broken stress values. When a material is stressed, the stress-strain ratio of the highest state of the maximum stress value is called the elastic limit, the elastic limit of the following, the deformation of the material is elastic deformation, after unloading the load, the material will return to the original shape; Force increases, the stress value increases and exceeds the intensity of the drop point, then the material will produce plastic deformation, when the load removed, the material will not be able to return to the original shape, showing permanent deformation. The yield strength of the material, that is, the yield strength, is a very important indicator in the design and manufacture of the mechanical structure. In terms of design, the yield strength is regarded as the limit of the magnitude of the force, which is used to judge the damage of the structure. In manufacturing, the drop strength can be used as a control of the forming of the workpiece, such as forging, rolling, drawing and extrusion. ...