|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|4925092||1363140||2018||6 صفحه PDF||ندارد||دانلود کنید|
â¢Non-collinear wave mixing is used for detection and localization of plasticity in aluminum alloy.â¢The efficiency of wave mixing is significantly affected by the incident angle.â¢A tolerable deviation (i.e. 4Â°) of incident angle is proposed based on simulations and experiments.â¢The proposed deviation is probably suitable for other metals with similar Poisson's ratios.
Non-collinear wave mixing recently has been proposed to detect and localize micro-damage in materials. It is proved sensitive to the interaction angle Î± of the incident waves. In this work, the relationship between the acoustic nonlinearity parameter Ï and the Î± is studied by numerical simulations and experimental measurements based on the nonlinear interaction of two shear waves. A single-peak change in the normalized acoustic nonlinearity parameter Ïâ² of the mixing wave versus the incident angle is observed from numerical simulations and then is verified by experiments. The results show a -6Â dB decrease of Ïâ² corresponds to a deviation of about 4Â° in the incident angle. Meanwhile, the detection and localization of plastic deformation is also conducted on an aluminum alloy based on the scanning of non-collinear wave mixing, in which the distribution of the acoustic nonlinearity is similar to that of the plastic strain.
Journal: NDT & E International - Volume 93, January 2018, Pages 1-6