高分子复合材料粘弹性的超声波评价
Evaluation of Polymer Composite Viscoelasticity by Ultrasonic Propagation Character
摘 要
基于复数弹性理论，分别用直接接触法和水延迟透射法阐述了EPDM5Si乙丙橡胶高分子复合材料的超声波衰减系数和相速度的求解方法，并利用衰减系数和相速度相关，求解材料的储藏弹性率和损失弹性率的比值损失正切tanδ。最后用动态力学分析(DMA)方法对求得的tanδ值进行了验证，结果非常吻合。建立了适于高分子复合材料动态粘弹性的超声无损评价系统。
超声波
动态力学分析
衰减系数
Rubber material
Ultrasonic wave
Dynamic mechanical analysis
Attenuation coefficient
Abstract
According to complex number elastic theories, the solution of attenuation coefficient and phase velocity of EPDM5Si polymer composite materials were expatiated with two kinds of methods (direct contact method and waters delay method). The tangent value of the loss angle, i.e. the ratio of the store energy modules and the loss energy modules was deduced. The result of the tangent value of the loss angle was validated by dynamic mechanical analysis (DMA) method, and proved to be exactitude. An evaluation system for polymer composite material by UT was established.
中图分类号 TB553 TG115.28
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收稿日期 2006/11/1
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备注常俊杰(1964-)，女，博士，从事无损检测研究工作。
引用该论文: CHANG Jun-jie. Evaluation of Polymer Composite Viscoelasticity by Ultrasonic Propagation Character[J]. Nondestructive Testing, 2007, 29(9): 546～548
常俊杰. 高分子复合材料粘弹性的超声波评价[J]. 无损检测, 2007, 29(9): 546～548
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参考文献
【1】Chang Junjie, Zheng C, Ni Q. The ultrasonic wave propagation in composite material and its characteristic evaluation[J]. Composite Structures,2006,75:451.
【2】Ping He. Acoustic dispersion and attenuation measurement using both transmitted and reflected pulses[J]. IEEE Transactions on Ultrasonics,1999,46(3):58.
【2】Ping He. Acoustic dispersion and attenuation measurement using both transmitted and reflected pulses[J]. IEEE Transactions on Ultrasonics,1999,46(3):58.
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