摘要
通过对M20 mm的10.9级高强度大六角螺栓楔负载试验中抗拉强度不确定度的来源进行分析,确定了螺栓抗拉强度的影响因素,并对测量结果的不确定度进行评定。结果表明:螺栓楔负载试验过程中抗拉强度不确定度来源主要包括试验力值、螺栓基本中径和小径、拉伸速度和数值修约等;抗拉强度的不确定度报告为Rm=1114 MPa,Urel=2%(k=2)。
The uncertainty sources of wedge load test of grade 109 high strength large hexagon bolt with the diameter of 20 mm were analyzed,the influencing factors of bolt tensile strength were identified and the uncertainty of the test results was evaluated.The results show that the main sources of uncertainty of tensile strength in bolt wedge load test included test force value,bolt basic pitch diameter and minor diameter,test speed and rounding off of numerical value.The uncertainty of tensile strength was reported as Rm=1114 MPa,Urel=2%(k=2).
作者
刘杨
贾仕君
巴发海
LIU Yang;JIA Shijun;BA Fahai(National Quality Supervision Testing Center for Metallic Materials,Testing Centre of Shanghai Research Institute of Materials,Shanghai 200437,China)
出处
《理化检验（物理分册）》
CAS
2020年第9期35-38,共4页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
关键词
钢结构
高强度大六角螺栓
楔负载试验
抗拉强度
不确定度评定
steel structure
high strength large hexagon bolt
wedge load test
tensile strength
uncertainty evaluation
