The mechanical properties and strength of ring forgings are calculated based on the mechanical properties and geometrical parameters of the material. The following is an overview of the mechanical properties and strength calculation methods of ring forgings in general:
- Strength calculation:
- First of all, it is necessary to obtain mechanical property data such as tensile strength, yield strength and shear strength of the material, which can be obtained through experiments or by referring to the corresponding material manual.
- Then, according to the geometry and force of the ring forgings, the appropriate strength formula is used for calculation.
- For common axisymmetric ring forgings, the stress state can be regarded as an axisymmetric pressure vessel, and the strength can be calculated according to the formula of a thin-walled pressure vessel. For example, the expansion pressure formula of the cylinder or the tangential stress formula are used for calculation.
- For non-axisymmetric ring forgings, appropriate stress analysis methods, such as finite element analysis, are selected according to their characteristics to perform strength calculations.
- Calculation of plastic deformation:
- The plastic deformation of ring forgings during loading can be calculated by the constitutive relation equation of materials combined with the analysis of stress field.
- The calculation of plastic deformation requires consideration of factors such as stress distribution, plastic flow rule and deformation rate during ring forging.
- Fatigue life calculation:
- Ring forgings are often subjected to alternating loads during use, and their fatigue life needs to be considered.
Fatigue life calculation is usually based on Wohler curve (S-N curve) and fracture mechanics theory to estimate the fatigue life of ring forgings under specific working conditions.
To sum up, the calculation of mechanical properties and strength of ring forgings needs to consider the mechanical properties, geometric shapes and stress conditions of materials, and combine appropriate models and formulas for calculation. For complex cases, a more accurate analysis may be required with the help of methods such as numerical simulation. Therefore, the specific calculation methods and steps need to be analyzed and determined in detail according to the specific situation.
