超声纵波法测试铝合金内部的载荷应力
Measurement of Applied Stress in Aluminum Alloy by Longitudinal Waves
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。
声弹效应
回振法
应力测试
Ultrasonic testing
Acoustoelastic effect
Singaround methods
Stress measurement
Abstract
Longitudinal waves were used to measure the applied stress in LY11 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.
中图分类号 TG115.28+5
所属栏目 试验研究
基金项目 江苏省重点实验室开放研究基金资助项目(SJ05046)
收稿日期 2008/5/23
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备注魏勤(1973-), 男, 讲师, 博士, 主要从事超声无损检测方面的研究。
引用该论文: 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
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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参考文献
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【2】Masumi Hasegawa, Yasutoshi Sasaki. Acoustoelastic Birefringence effect in wood I: effect of applied stresses on the velocities of ultrasonic shear waves propagating transversely to the stress direction[J]. The Japan Wood Research society,2004,(50): 47-52.
【3】Masumi Hasegawa, Yasutoshi Sasaki. Acoustoelastic Birefringence effect in wood II: Influence of texture anisotropy on the polarization direction of shear wave in wood[J]. The Japan Wood Research Society,2004,(50): 101-107.
【4】Masumi Hasegawa, Yasutoshi Sasaki. Acoustoelastic Birefringence effect in wood III: Ultrasonic stress determination of wood by acoustoelastic birefringence method[J]. The Japan Wood Research society,2004,(50): 108-114.
【5】Clark A V, Mignogna G. Acoustoelastic measurement of stress and stress intensity factors around crack tip[J]. Ultrasonic,1983,21(2): 57-64.
【6】Clark A V. On the use of acoustic birefringence to determine components of plane stress[J]. Ultrasonic,1985,(1): 21-30.
【7】Hughes D S, Kelly J L. Second-order elastic deformation of solids[C]. Phy Rev 92,1953: 1145.
【8】Murnaghan F D. Finite deformation of an elastic solid[M]. New york: John Wiley,1951.
【9】王庆光.残余应力检测技术及其应用[J].重型机械科技,2002,(4): 39-41.
【10】徐 虹,滕宏春,崔 波,等.残余应力非破坏性测量技术的发展现状简介[J].理化检验-物理分册,2003,39(11): 595-598.
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