Reliability and life evaluation and prediction of starting bar forging is a process of scientific evaluation and prediction of its durability and service life. By analyzing the material characteristics, working environment, stress load and other factors of the starting bar forging, its reliability can be evaluated and its life can be predicted.
- Reliability assessment:
- Material characteristics analysis: Detailed material test and analysis of the materials used in the forging of the starter rod, including tensile test, impact test, fatigue test, etc., to obtain the relevant material parameters, such as strength, toughness, hardness, etc.
- Working environment analysis: The working environment of the starting rod forging is analyzed, including the consideration of temperature, humidity, corrosive media and other factors, to determine whether the reliability of the starting rod forging is affected.
- Stress load analysis: Analyze the stress load of the starting rod forging under working conditions, including static load, dynamic load, impact load, etc., and determine the actual stress load through experimental testing or numerical simulation.
- Reliability assessment method: According to the obtained material and load information, the reliability theory (such as probability statistical method, reliability index, etc.) is used to conduct reliability assessment to determine the failure probability and reliability of the starter bar forging under the given reliability requirements.
- Life prediction:
Fatigue life analysis: According to the experimental data and load characteristics, the fatigue characteristics of the starting rod forgings are analyzed, and the fatigue life of the starting rod forgings can be predicted by S-N curve (stress-life curve) or fatigue damage accumulation model.
- Stress intensity factor analysis: The stress distribution of starting rod forgings is analyzed. Through the calculation and judgment of stress intensity factor, the crack growth rate of starting rod forgings can be evaluated, so as to predict its crack growth life.
- Reliability growth model: Combined with experimental, test and monitoring data, reliability growth model (such as Weibull distribution, residual life prediction model, etc.) is used to predict the residual life of the starter bar forging.
- Life prediction model: Based on stress-strain analysis and damage accumulation law, the life prediction model of starter bar forging is constructed by numerical simulation method, and the life remaining is predicted by analyzing the life under different working conditions and loads.
To sum up, the reliability and life evaluation and prediction of starting rod forging is a process of comprehensive analysis and prediction in the aspects of material, working environment and stress load. Through scientific analysis method and reliability theory, the reliability and service life of starting bar forging can be evaluated and predicted effectively, which provides important reference for engineering design and operation and maintenance.
