The strength and reliability evaluation of automobile forgings is the key research direction to ensure that the forgings can withstand the mechanical load under the design requirements and ensure their safety and reliability. Here are some common assessment methods. Strength evaluation method: Numerical simulation analysis: Through finite element analysis, computer aided engineering and other numerical simulation to obtain the stress and strain distribution of forging under different working conditions, and then calculate the strength indicators, such as maximum principal stress, equivalent stress, etc. Analytical calculation method: Based on material mechanics theory and mechanical formula, combined with geometric shape and stress concentration factors, the strength index of forging is derived by analytical calculation method. Experimental test methods: tensile test, compression test, torsion test and other experimental means to obtain the mechanical properties of forging parameters, and then evaluate the strength. Reliability evaluation method: Statistical analysis method: Using statistical principles and methods, according to the life distribution of forgings under normal use conditions, establish a reliability model to predict the failure probability and reliability of forgings within a certain use time. Test life acceptance method: Through the accelerated life test of forgings, observation and analysis of its failure situation, speculate the life and reliability of forgings in actual use. Reliability design method: Reliability theory and method are introduced in the forging design process, combined with probability statistics, reliability mathematical modeling and other methods to optimize the design parameters to improve the reliability of forging under various working conditions. In addition, the reliability of automobile forgings can be evaluated by fault tree analysis, failure mode and impact analysis, reliability growth test and other methods. Each method has its applicable circumstances and limitations, and the appropriate evaluation method should be selected according to the specific circumstances to ensure a comprehensive and accurate evaluation of the strength and reliability of automobile forgings.
