Mechanical parts performance

The performance of mechanical parts refers to the material properties of the parts when they are used, including mechanical, physical and chemical properties. For most parts, mechanical properties are the main indispensable indicators. The parameters characterizing mechanical properties mainly include strength limit σb, elastic limit σe, yield strength σs or σ0.2, elongation δ, section shrinkage ψ, impact. Toughness ak and hardness HRC or HBS. The strength of these parameters is the main performance index of mechanical properties. Only when the strength meets the requirements can the parts be working properly and durable. In the study of material mechanics, it has been found that the allowable stresses used in designing the dangerous section dimensions or the safety of the part are calculated based on the material strength data.