拉伸试验中测量的不确定度评定

介绍拉伸试验中测量结果的不确定度评定方法。依据测量不确定度的七个评定步骤，按不同的试样形状、尺寸，试验人员、尺寸测量器具、试验机等级、引伸计等级、拉伸速度等影响因素分别给出拉伸试验中的强度指标RP、ReH、ReL、Rt、Rm，与塑性指标A、Z测量结果的不确定度评定。此次给出的拉伸试验中测量结果的不确定度评定适用于本部门拉伸试验，可按试验时所用的试样形状、尺寸、测量器具、试验机、引伸计等条件选用不确定度的评定结果。

Evaluation of the Measurement Uncertainty in Tensile Test

An approach to evaluate the measurement uncertainty based on tensile test results is introduced.On the basis of seven steps for measurement uncertainty,strength indexes,such as R P, R eH , R eL , R t, R m,and plasticity indexes,such as A and Z in the tensile test,were given respectively with consideration of the following influential factors,such as specimen shape and dimension,tester,dimension measurement tools,grade of testing machine,grade of extensometer,tensile speed,etc.