| 有机材料热老化损伤非线性超声检测试验研究 |
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| 引用本文： | 焦敬品,李亮,何存富,吴斌.有机材料热老化损伤非线性超声检测试验研究[J].北京工业大学学报,2016(1):24-29. |
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| 作者姓名： | 焦敬品 李亮 何存富 吴斌 |
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| 作者单位： | 北京工业大学机械工程与应用电子技术学院,北京,100124 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 针对有机材料热老化评价问题,利用二次谐波非线性效应对有机材料热老化进行检测试验研究. 在考虑基波与二次谐波幅值随频率变化的基础上,提出了一种非线性损伤因子,并将其应用于有机材料热老化损伤评价.对不同热老化有机材料试件进行了非线性超声检测试验. 研究发现:随着热老化时间的增加,其非线性损伤因子呈衰减趋势. 因此,提出的非线性损伤因子可用于有机材料热老化损伤评价.
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| 关 键 词： | 非线性超声 热老化 二次谐波 非线性损伤因子 |
Experimental Investigation of Thermal Aging of Organic Polymer Materials With Nonlinear Ultrasonic Method |
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| JIAO Jingpin,LI Liang,HE Cunfu,WU Bin.Experimental Investigation of Thermal Aging of Organic Polymer Materials With Nonlinear Ultrasonic Method[J].Journal of Beijing Polytechnic University,2016(1):24-29. |
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| Authors: | JIAO Jingpin LI Liang HE Cunfu WU Bin |
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| Abstract: | Aiming at the problem of thermal aging of organic materials, a thermal aging detection method for organic materials based on the second harmonic nonlinearity effect was developed. Considering that the amplitudes of the fundamental harmonic and the second harmonic are both changed with the frequency, a nonlinear damage factor used for the thermal aging damage assessment of the organic materials was proposed. Simultaneously, the nonlinear damage factor decays with the increase of the thermal aging time that was discovered by nonlinear ultrasonic detection. Therefore, the nonlinear damage factor can be used in the thermal aging damage assessment of organic materials. |
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| Keywords: | nonlinear ultrasonic thermal aging second harmonic nonlinear damage index factor |
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