材料科学
超声波传感器
传感器
激光器
压电
压力(语言学)
残余应力
超声波
变形(气象学)
横截面
复合材料
声学
光学
结构工程
语言学
哲学
物理
工程类
作者
Aleksei Podolsky,Vladimir Koshkin,Viktor Bel'Ko,Andrei Fetisov,Alexander A. Karabutov
出处
期刊:Journal of the Acoustical Society of America
[Acoustical Society of America]
日期:2008-05-01
卷期号:123 (5_Supplement): 3287-3287
摘要
Stress in metal was investigated by acousto-elastic effect. The dependence of longitudinal ultrasonic wave velocity on transverse stress was considered. A laser-ultrasonic defectoscope was used for precise ultrasonic velocity measurement. Optoacoustic transducer provides laser excitation and piezoelectric wide-band detection of ultrasonic pulse. The accuracy of the measurement exceeded 0.1% for 2 mm thick metal sample. Samples in the form of plates with the thickness of 2 to 4 mm made of aluminum and titanium alloys and stainless steel were tested. The samples were loaded quasistatically, the load was changing from zero to yield point stress. Load, deformation and velocity of ultrasound were measured. It is shown that the velocity changes significantly with the load. Some features of the velocity change under tensile stress are presented. The possibility of the local residual stress measurement with the laser-ultrasonic technology is discussed.
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