Backscatter of Ultrasonic Gaussian Beams by a Microcrack Distribution Plane within a Material

スポンサーリンク

概要

• 論文の詳細を見る

• The theoretical study for quantitative evaluation of material quality by the backscatter of an ultrasonic Gaussian beams has been made. The density and location of flaws, such as microcracks and porosities, can be estimated by the change of electrical power due to the backscatter. The power change is theoretically formulated based on the dynamic reciprocal theorem. Some kinematical postulations are used for simplicity to neglect the multiple scattering effect among the flaws; the characteristic dimension of a contained flaw is very small in comparison to the incident wavelength, and the flaw distribution is sparse. Numerical calculations of the analytical backs-cattering power have been carried out. The power is approximately proportional to the flaw density. The obtained expression is of closed form, and it is easy to calculate the power. Thus, the expression is practical for the quantitative characterization from the backscattering wave data by ultrasonic measurement.

• 一般社団法人日本機械学会の論文
• 1991-07-15

著者

• Ohyoshi Tadashi

  Mining College Akita University

関連論文

• Experimental Analysis of Elastic Wave Propagation in a Rectangular Plate by Longitudinal End-Impact : Series A : Solid-Mechanics, Strength of Materials
• 周期的に不均質な弾性体を伝播する過渡的応答波形
• Dynamic Stresses Produced in an Elastic Half Space by Reciprocally Moving Surface Loads
• Backscatter of Ultrasonic Gaussian Beams by a Microcrack Distribution Plane within a Material

スポンサーリンク