| 超声纵波法测试铝合金内部的载荷应力 |
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| 引用本文： | 魏勤,罗琅,张礼华.超声纵波法测试铝合金内部的载荷应力[J].无损检测,2009,31(3):217-219. |
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| 作者姓名： | 魏勤 罗琅 张礼华 |
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| 作者单位： | 魏勤,张礼华,WEI Qin,ZHANG Li-Hua(江苏科技大学数理学院,镇江,212003;江苏大学理学院,镇江,212013);罗琅,LUO Lang(江苏科技大学数理学院,镇江,212003)
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| 基金项目： | 江苏省重点实验室开放研究基金 |
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| 摘 要： | 用超声纵波测量LY11型铝合金在单轴应力作用下的声速变化。结果表明，材料在拉、压单轴应力作用下，超声纵波的声速相对变化量与应力成线性关系，与理论相符。试验中采用回振法测试原理搭建的测试系统，可测量声速的微小变化，精度高，可用于无损测试材料内部应力。
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| 关 键 词： | 超声波检测 声弹效应 回振法 应力测试 |
Measurement of Applied Stress in Aluminum Alloy by Longitudinal Waves |
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| WEI Qin,LUO Lang,ZHANG Li-Hua.Measurement of Applied Stress in Aluminum Alloy by Longitudinal Waves[J].Nondestructive Testing,2009,31(3):217-219. |
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| Authors: | WEI Qin LUO Lang ZHANG Li-Hua |
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| Affiliation: | WEI Qin, LUO Lang, ZHANG Li-Hua(1. Department of Physics, Jiangsu University of Science and Technology, Zhenjiang 212003, China; 2. Faculty of Science, Jiangsu University, Zhenjiang 212013, China) |
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| Abstract: | Longitudinal waves were used to measure the applied stress in LYll Aluminum alloy. Experimental results showed that the presence of stress caused small changes in phase velocities of longitudinal waves, and the velocity was increased by increasing applied stress. Furthermore, the percentage change in velocity was proportional to the stress. This linear relationship provided a practical non-destructive technique of stress measurement. The phase velocity was tested by sing-around methods, which small changes in velocity could be detected. |
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| Keywords: | Ultrasonic testing Acoustoelastic effect Singaround methods Stress measurement |
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