2D finite element modeling of ultrasonic time of flight diffraction technique

被引：0

作者：

机构：

[1] Riahi, Mohammad

[2] Khademikhaledi, Mohammad R.

[3] Valipou, Ali

来源：

| 1600年 / American Society for Nondestructive Testing卷 / 72期

关键词：

Advanced ultrasonics - Commercial software - Complex geometries - Finite element packages - Inspection technique - Simulated results - Specular reflections - Thin-sections - Time of flight diffraction techniques - Ultrasonic techniques;

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摘要：

Time of flight diffraction (TOFD) is rapidly gaining importance as a standalone inspection technique and is an advanced ultrasonic technique that fulfills the need for reliable inspections. TOFD is routinely used in a wide range of applications such as inspection of piping and pressure vessels. The principle of the TOFD technique is based on mapping the position of the edges of discontinuities. This is in contrast with conventional ultrasonics, which relies on the amplitude of specular reflections received from discontinuities. A discontinuity's length can be readily measured by subtracting the depth of the lower and higher edges. Like any other technique, TOFD also has its limitations. In this investigation, this technique was applied to thick sections (

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