金属试件拉伸强度试验测量不确定度的评定

The assessment of measurement uncertainty in the tensile strength tests on metal specimen

探讨对特定试件测试拉伸强度所引起的测量不确定度。根据计量部门和质检部门的鉴定标准,从试验机和金属材料质量方面对数学模型的建立、多个测量不确定度的表示以及材料合格评定进行了详尽的分析,供测试其它材料拉伸强度的测量不确定度规范表达时参考。

This paper investigates and discusses the measurement uncertainty amused by testing the tensile strength of special specimen. According to the appraisal standard from metrological service and quality inspection department, from aspects of testing the machine and metal material quality, the paper carries out detailed analysis on three points： the mathematic model building-up, several expressions of measurement uncertainty and material qualified assessment, aiming at offering references when normatively expressing measurement uncertainty of the tensile strength tests on other materials.