建筑排水用硬聚氯乙烯管材拉伸屈服应力的测量及不确定度评定  

Measurement and uncertainty evaluation of tensile yield stress of UPVC pipes for building drainage

作　　者：王伟 王建 黄榜 宋磊 石博成 WANG Wei;WANG Jian;HUANG Bang;SONG Lei;SHI Bocheng(Chongqing Academy of Metrology and Quality Inspection,Chongqing 401123,China)

机构地区：[1]重庆市计量质量检测研究院,重庆401123

出　　处：《中国测试》2020年第S02期67-70,共4页China Measurement & Test

摘　　要：介绍PVC-U排水管材的特点、应用以及发展前景,根据热塑性塑料管材拉伸性能测定标准中的有关规定,建立建筑排水用PVC-U管材拉伸屈服应力测量不确定度的数学模型,并结合实例对不确定度来源进行分析。通过对不确定度分量进行量化合成得出,当PVC-U排水管拉伸屈服应力为43.0MPa时,其扩展不确定度为0.8MPa(k=2)。结果表明,屈服点的拉力对拉伸屈服应力的测量结果影响最大,其次是拉伸屈服应力的测量重复性。Thecharacteristics,application and development prospect of PVC-U drainage pipe were introduced.According to the relevant provisions in the test standard of tensile property of thermoplastic pipe,the mathematical model of uncertainty of tensile yield stress measurement of PVC-U Pipes for Soil and Waste Discharge inside Buildings was established and the source of uncertainty was analyzed by sample.It had been concluded that when the tensile yield stress of PVC-U drainage pipe is 43.0 MPa,the expanded uncertainty was 0.8 MPa(k=2).By quantifying and synthesizing the uncertainty component.The results showed that the main factors which affected the tensile yield stress were the tension at the yield point.The second was the measurement repeatability of tensile yield stress.

关 键 词：PVC-U排水管 拉伸屈服应力 相对标准不确定度 不确定度评定 

分 类 号：TU823[建筑科学]