摘要
针对传统静态拉伸法测量玻璃纤维模量存在的局限性,研究利用超声波测量玻璃及玻璃纤维模量的动态测试方法。本文详细分析其测量原理、测量方法,并对设备测试准确性和系统不确定度进行统计分析。其中标准样品高纯石英玻璃的超声测试结果表明,其声速测量结果误差≤0.3%,标准差(SD)≤20;对50mm的石英玻璃反复测量,由测量值分析得到偏差≤0.3%,变异系数≤0.39,测试系统的不确定度≤5%;利用不同牌号商用玻璃粗丝样品(包括无碱E、高强2号、高强4号和高强6号玻璃)验证本测试系统准确性,测试结果表明本实验结果与早期公布玻璃纤维声波测试值相比,高强2号和4号模量偏差≤0.34%,无碱E玻璃模量偏差较大,为8.1%,这主要与无碱E玻璃成分变化有关;因此利用超声测试玻璃及玻璃纤维模量的动态方法,结果精确且误差较小,模量标准差(SD)≤0.8;同时此动态方法测试范围广,样品尺寸0.2mm≤粗丝尺寸或玻璃块体,样品制备简单,操作简便,能满足玻璃及玻璃纤维产品的模量快速准确测量。
In order to solve the limitations of traditional static tensile measuring methods for glass fibers,a dynamic testing method for measuring glass and glass fiber module using ultrasonic wave was studied.This article analyzes its measuring principle and measuring method in detail,and analyzes the testing accuracy of equipment and system uncertainty.The ultrasonic testing results of the standard sample of high-purity quartz glass have shown that the sound velocity measurement deviation is≤0.3%,and the standard deviation(SD) is≤20.The 50 mm quartz glass was repeatedly measured,with the deviation of measurement value≤0.3%,the coefficient of variation≤0.39,and the uncertainty of the testing system≤5%.The accuracy of the testing system was verified by using different grades of commercial course glass strand samples(including alkali-free E,high-strength No.2,high-strength No.4 and high-strength No.6 glass).The testing results have shown that compared with the earlier published glass fiber acoustic wave test values,high-strength No.2 and No.4 module deviation is≤0.34%,non-alkali E glass modulus deviation is up to 8.1% in this experiment,which is mainly related to the change of alkali-free E glass composition.Therefore,the ultrasonic method for testing glass and glass fiber module is accurate,and the deviation is small,and the standard deviation(SD) of the modulus is≤0.8.At the same time,the dynamic method has a wide testing range,and the sample size is 0.2 mm≤course glass strands size or glass frit.The samples are simple to prepare and easy to operate,and can fulfil the rapid and accurate measurement of glass and glass fiber module.
作者
祖群
黄三喜
张焱
黄松林
朱纪青
Zu Qun;Huang Sanxi;Zhang Yan;Huang Songlin;Zhu Jiqing(State Key Laboratory of Specialty Fiber Composite,Nanjing Fiberglass R&D Institute,Nanjing 210012)
出处
《玻璃纤维》
CAS
2019年第5期1-7,12,共8页
Fiber Glass
关键词
玻璃及玻璃纤维
超声
模量
glass and glass fiber
ultrasonic
modulus