Titlebook: Ultrasonic Testing of Materials; Josef Krautkrämer,Herbert Krautkrämer Book 19833rd edition Springer-Verlag Berlin Heidelberg 1983 Materia

形上升才刺激

Intensity Methodstrasonic waves for non-destructive testing. It dates back to 1930 and was originated by Sokolov and Mühlhäuser [686, 523]. The principle is shown in Fig. 9.1 in which the intensity method is portrayed schematically by passing sound through a test plate, at a flawless and alternately at a defective point.

极端的正确性

愤慨一下

Coupling, Choice of Probe and Measuring Frequencythe method applied, making it necessary to first prepare the surface. On the other they have a decisive influence on the wear of the probe used for continuous and routine tests if in direct contact with the specimen. The surface conditions, therefore, greatly influence the economics of testing.

准则

Interference Effect of Boundaries. Complex Sound Paths and Screen Patterns becoming very complicated and interpretation of the screen picture more difficult. The principles of wave propagation discussed in Chapter 2 will therefore be applied to a few frequently occurring cases.

harpsichord

Echo and Shadow of an Obstacle in the Sound Fieldore defects are classified according to their dimensions transverse to the beam, as large or small defects. The designation . of course constitutes no evaluation of the seriousness of the defect in respect of the usefulness of the test object concerned.

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PHAG

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