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屈服极限(屈服点σ_??及屈服强度σ_(0.2))是金属材料在设计构件时最常用的强度指标,是一重要的力学性能参数,该参数值取决于变形速率,而变形速率则受拉力试验系统柔度(即K值)的明显影响,本文对拉力试验系统的柔度进行了综合分析,定量的描述了拉伸过程中变形速率的变化与K值的关系,研究了K值对测定屈服点的影响,讨论了K值的应用及测定方法,探讨了K值在测定屈服强度及其它力学试验中应用的可能性.
The yield point (yield point σ_ and yield strength σ_ (0.2)) is the most commonly used strength index of metallic materials in the design of structures and is an important parameter of mechanical properties. The value depends on the rate of deformation and the rate of deformation is affected by Tensile test system flexibility (ie, K value) of the obvious impact of the tensile test system in this paper, a comprehensive analysis of the flexibility to quantitatively describe the relationship between the rate of deformation during deformation and K value of K value of the study The influence of yield point was measured. The application of K value and the determination method were discussed. The possibility of applying K value in determining yield strength and other mechanical tests was also discussed.