聚醚醚酮核用电缆料拉伸性能测量不确定度评定

选择GUM法对核用电缆料聚醚醚酮(PEEK)薄膜的拉伸强度和断裂拉伸应变,进行测试结果的测量不确定度评定,分别从A类不确定度和B类不确定度进行评定,A类不确定度主要通过重复测试来分析PEEK试样的均匀性产生的测量不确定度,拉伸强度的B类不确定度主要考察了仪器设备引入的测量不确定度,断裂拉伸应变的B类测量不确定度还考察了测试结果的数值修约引入的测量不确定度。结果表明,厚度为1.00 mm的PEEK试样,拉伸速率为20 mm/min,拉伸强度的测试结果为112 MPa,k=2时,测量不确定度为5 MPa;断裂拉伸应变的测试结果为150%,k=2时,测量不确定度为10%。

Evaluationof Tensile Property Measurement Uncertainty of PEEK Material for Nuclear Power Cable

GUM method was used to evaluate the measurement uncertainty of test results for the tensile strength and tensile strain at break of nuclear cable material polyether-ether-ketone(PEEK)film.The type A and type B measurement uncertainty were evaluated,respectively.The type A measurement uncertainty was mainly evaluated by repeating uniformity tests of PEEK samples.The type B measurement uncertainty of tensile strength mainly investigated the instrument and equipment.The effect of rounding off numerical values on the type B uncertainty of measurement of tensile strain at break was also analyzed.The results indicate that under the PEEK samples with the thickness of 1.00 mm,tensile rate of 20 mm/min,the tensile strength is 112 MPa and the measurement uncertainty is 5 MPa,when k is 2.The tensile strain at break is 150%and the measurement uncertainty is 10%,when k is 2.