Image Based EFIT Simulation for Nondestructive Ultrasonic Testing of Austenitic Steel

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概要

• 論文の詳細を見る

• The ultrasonic testing (UT) of an austenitic steel with welds is difficult due to the acoustic anisotropy and local heterogeneity. The ultrasonic wave in the austenitic steel is skewed along crystallographic directions and scattered by weld boundaries. For reliable UT, a straightforward simulation tool to predict the wave propagation is desired. Here a combined method of elastodynamic finite integration technique (EFIT) and digital image processing is developed as a wave simulation tool for UT. The EFIT is a grid-based explicit numerical method and easily treats different boundary conditions which are essential to model wave propagation in heterogeneous materials. In this study, the EFIT formulation in anisotropic and heterogeneous materials is briefly described and an example of a two dimensional simulation of a phased array UT in an austenitic steel bar is demonstrated. In our simulation, a picture of the surface of the steel bar with a V-groove weld is scanned and fed into the image based EFIT modeling.

• 一般社団法人 日本機械学会の論文

著者

• Hirose Sohichi

  Department Of Mechanical And Environmental Informatics Graduate School Of Information Science And Engineering Tokyo Institute Of Technology

• NAKAHATA Kazuyuki

  Department of Civil and Environmental Engineering, Ehime University

• SCHUBERT Frank

  Fraunhofer Institute for Nondestructive Testing, Dresden Branch (IZFP-D)

• KÖHLER Bernd

  Fraunhofer Institute for Nondestructive Testing, Dresden Branch (IZFP-D)

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