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一、引言应力-应变曲线(σ-ε曲线)是一种重要的力学性能试验结果。它提供样品在外力作用下所发生的变形、屈服、硬化及其应力诱发的其它有关信息。对客观性能参数测试而言,为保证试验数据的可靠性,大尺寸样品往往是必要的。但是,对于某些过程研究而言,小尺寸试样却能反映出更好的微观检测灵敏度。本文拟用实验结果来验证,并从统计的角度讨论试样尺寸因素对应力-应变曲线的影响。
I. INTRODUCTION The stress-strain curve (σ-ε curve) is an important mechanical property test result. It provides deformation, yielding, hardening and other stress-induced information about the sample under external forces. For the objective performance parameter test, in order to ensure the reliability of the test data, large-size samples are often necessary. However, for some process studies, small size samples reflect better microscopic detection sensitivity. This paper intends to use experimental results to verify, and from a statistical point of view to discuss the sample size factor stress-strain curve.