PE管材热老化程度的超声非线性表征  

Ultrasonic Nonlinear Characterization of Thermal Aging Degree of Polyethylene Pipes

作　　者：张世玮 侯怀书 李宇翔 陈朝雷 余晓东 Zhang Shiwei;Hou Huaishu;Li Yuxiang;Chen Chaolei;Yu Xiaodong(Shanghai Engineering Research Center of Physical Vapor Deposition(PVD)Superhard Coating and Equipment,Shanghai Institute of Technology,Shanghai 201418,China;School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Yulin City Special Equipment Inspection,Yulin 719000,China)

机构地区：[1]上海应用技术大学,上海物理气相沉积(PVD)超硬涂层及装备工程技术研究中心,上海201418 [2]上海理工大学,能源与动力工程学院,上海200093 [3]榆林市特种设备检验检测院,陕西榆林719000

出　　处：《工程塑料应用》2020年第12期102-106,共5页Engineering Plastics Application

基　　金：上海市科委重点支撑计划项目(19090503400)。

摘　　要：以热老化时间不同的聚乙烯(PE)管材为研究对象,分析其力学性能;搭建超声检测装置并采集不同热老化试样的超声信号,通过频谱分析(快速傅里叶变换)获得基波和二次谐波的幅值计算超声非线性系数;建立聚乙烯管材超声非线性系数与力学性能之间的变化关系。结果表明,聚乙烯管材的缺口冲击强度随超声非线性系数的增加逐渐减小。由此,可通过超声非线性系数表征聚乙烯管材的力学性能,进而评价聚乙烯管材的热老化程度。The mechanical properties of polyethylene(PE)tubes with different thermal aging time were analyzed.The ultrasonic testing device was set up and ultrasonic signals of different thermal aging samples were collected,and amplitude of fundamental wave and second harmonic was obtained through spectrum analysis(fast Fourier transform)to calculate the ultrasonic nonlinear coefficient,and relationship between ultrasonic nonlinear coefficient and mechanical properties of polyethylene tubes were established.The results show that the notched impact strength of polyethylene pipe decreases with the increase of ultrasonic nonlinear coefficient.Therefore,the mechanical properties of polyethylene pipe can be characterized by ultrasonic nonlinear coefficient,and then the thermal aging degree of polyethylene pipe can be evaluated.

关 键 词：聚乙烯 热老化 冲击强度 频谱分析 非线性系数 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]