Determination of Changes in Young's Modulus, Impact Energy, Absorption Capacity, Fracture Toughness and Fatigue Deformation by Fatigue and Creep Progression of Materials

摘要

The technical field to which the present invention belongs is related to the identification and testing of mechanical properties of materials, and the technical problem to be solved has been used only as a design data for fatigue life and creep rupture time in the fatigue and creep design of machinery and structures. The results of the study found that the material experienced changes in Young's modulus, impact energy absorption, fracture toughness and fatigue strain during use, suggesting a more specific and precise method for reliability design that underlies all engineering designs. Summary of the Invention The solution of the present invention is that the Young's modulus decreases due to rotational alignment of the crystal grains of the polycrystalline material due to the plane strain and the biaxial tensile shear deformation caused by the fatigue and creep loading. The mechanical properties are used to create a formula to estimate the change over fatigue cycle and creep time. In addition, the principle of the superconductor is identified from a new angle, and the method of increasing the critical temperature and the critical current density by rotating the crystal lattice at high temperature by the fatigue and creep method is proposed according to the principle, and also detects the fatigue and creep progress of machinery and structures. As a non-destructive inspection method to strike the surface of the structure by measuring the natural frequency of the impact vibration by comparing with the related formulas of the present invention to determine the progress or to produce a non-destructive test table of the vibration vibration. An important use of the present invention is to provide a formula for estimating the mechanical properties during use for designing the reliability of machines and structures, to significantly reduce the time required for material testing, and to use the basic principles of fatigue and creep in the development of other technologies, It contributes to the improvement of NDT technology.