Ultrasonic stress measurements based on the generalized acoustic ratio technique
Ultrasonic stress measurements based on the generalized acoustic ratio technique
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DOI：
10.1016/0020-7683(95)00069-0
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发表时间：
1996-03-01
影响因子：
3.6
通讯作者：
Janssen, M
中科院分区：
文献类型：
--
作者：
Dorfi, HR;Busby, HR;Janssen, M
基于波在预应力固体中的传播理论，提出了一种新的局部平面几何应力重建方法——广义声比（GAR）技术。GAR方法要求测量垂直于应力平面的三种超声波模式（纵波和横波）的飞行时间以及相关的横波偏振角。根据这些超声数据和校准后的材料性能，确定了局部平面应力张量。测量单轴拉伸试样产生声弹性校准常数。
Based on the theory of wave propagation in prestressed solids, a new stress reconstruction method, the Generalized Acoustic Ratio (GAR) technique, is developed for locally plane geometries. The GAR method requires the measurement of the time of flight of the three ultrasonic wave modes (longitudinal and shear waves) perpendicular to the plane of stress and the associated shear wave polarization angles. From this ultrasonic data and calibrated material properties, the local plane stress tensor is determined. Measurements on uniaxial tension test specimens yield the acoustoelastic calibration constants.