卸载柔度法测量紧凑拉伸试样裂纹长度的不确定度评定  

Uncertainty evaluation of crack length measurement in compact tensile specimens using unloading flexibility method

作　　者：程柄午 CHENG Bingwu(Shanghai Key Laboratory of Engineering Materials Application and Evaluation,Shanghai Research Institute of Materials Co.,Ltd.,Shanghai 200437,China)

机构地区：[1]上海材料研究所有限公司上海市工程材料应用与评价重点实验室,上海200437

出　　处：《理化检验(物理分册)》2025年第4期33-36,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：采用柔度法对金属材料紧凑拉伸试样的裂纹长度进行测量,对测量过程中的不确定度来源进行分析,并对该方法的不确定度进行了评定。结果表明:测量过程中影响不确定度的主要因素有试样尺寸和卸载柔度等,该试样裂纹长度测量结果的不确定度报告显示,试样的裂纹长度为22.73 mm,扩展不确定度为0.10 mm,包含因子为2。The crack length of compact tensile specimens of metal materials was measured using the flexibility method,and the sources of uncertainty during the measurement process were analyzed.The uncertainty of this method was evaluated.The results show that the main factors affecting uncertainty during the measurement process were sample size and unloading flexibility.The uncertainty report of the crack length measurement results of the sample showed that the crack length of the sample was 22.73 mm,the expansion uncertainty was 0.10 mm,and the inclusion factor was 2.

关 键 词：紧凑拉伸试样 卸载柔度法 裂纹长度 不确定度评定 试样尺寸 

分 类 号：TB31[一般工业技术—材料科学与工程] TG115.2[金属学及工艺—物理冶金]