K536室温拉伸抗拉强度不确定分析

Analysis on Measurement Uncertainty of Tensile Strength of K536 at Room Temperature

本文以K536棒材的抗拉强度检测数据为基础,建立数据分析的数学模型。从试验重复性、最大力测量、原始横截面积测量、试验速率、数值修约间隔等方面分析并计算各主要标准不确定度分量,最终根据概率分布原理,得出抗拉强度检测数据的扩展不确定度,为评价试验数据的可靠性提供了一种评价方法。

Based on the measured data of K536 tensile strength test,this paper introduces a method for assessing the reliability of test results by establishing a mathematical model,analyzing and calculating the relative standard uncertainty components from measurement repeatability,the deviation of maximal force measurement system,the effect of loading speed,the deviation of specimen size measurement and numerical rounding interval,and forming the expanded uncertainty of the tensile strength with the principle of probability distribution.