Evaluation and analysis of uncertainty in tensile experiment results of modified PPR at elevated temperature

2nd International Conference on Materials Science, Energy Technology and Environmental Engineering

材料科学;能源学;生态环境科学

Xiang, Yu^1 ; Zhonghua, Su^1 ; Jinhua, Leng^1 ; Teng, Yun^1

Chongqing Institute of Metrology and Quality Inspection, Chongqing

401123, China^1

关键词: Elevated temperature;    Evaluation and analysis;    High temperature mechanical properties;    High-temperature tensile;    Measurement standards;    Nonuniformity;    Random copolymer;    Sample sizes;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/81/1/012033/pdf
DOI  :  10.1088/1755-1315/81/1/012033

来源: IOP

【 摘 要 】

A high temperature tensile experiment of modified random copolymerized polypropylene was carried out by ASTM D 638-2014. It analyzed the factors influencing the accuracy of the high temperature mechanical properties of modified random copolymer polypropylene and discussed the causes of the uncer-tainty of measurement standards from the sample size measurement, the indication error of force value of experiment machines, its calibration, data acquisition of the experimental software, the temperature control, the numerical correction, and the material nonuniformity, etc. According to JJF 1059.1-2012, class A and class B evaluation were conducted on the above-mentioned uncertainty components, and all the uncertainty components were synthesized. By analyzing the uncertainty of the measurement results, this paper provides a reference for evaluating the uncertainty of the same type of measurement results.