By Gerhard Busse, Danny Van Hemelrijck, Igor Solodov, Athanasios Anastasopoulos

Non-destructive checking out (NDT) is a pertinent job in nearly each box of human task, from the assuring of airplane integrity to the review of infrastructural decay because of deterioration or harm. the improvement of non-destructive tools for caliber administration ends up in financial and environmental merits, in a rise in product reliability, and in greater public security and safety. This ebook includes over fifty reviewed and edited papers at the cutting edge advancements and new applications in NDT. It covers cutting-edge NDT tools, together with optical, acoustic, ultrasonic, and electromagnetic ideas, tomography, radiography, and thermography. meant for a researchers and practitioners involved with studying, trying out and conserving equipment, items and parts in laboratory and commercial environments.

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The method is called ‘‘X-Ray Refraction Topography’’. Usually the strong intensity of the X-ray refraction signal allows scanning the samples within relatively short time. 1 and 5 seconds per sample position are required for 2% signal to noise ratio, depending on sample absorption and the inner surface concentration. An example of X-Ray Refraction Topography is given by Figure 8. It shows SiC ceramic samples, the green body state (left, 44% porosity) an 20 Figure 8. ) of SiC before and after sintering at different temperatures T; p: porosity.

A. Zverev, Modulation technique for measuring the dispersion of ultrasound, Dokl. Akad. Nauk. SSSR, 91, 791 (1953); Sov. Phys. , 1, 353–357 (1955). T. Blackstock, Audio application of parametric array, J. Acous. Soc. , 102, 3106 (1997). J. Pompei, The audio spotlight: put sound wherever you want it, J. Audio Eng. , 47, 726–731 (1999). [12] M. Saeid, B. Castagnède, A. Moussatov, V. Tournat, V. R. Mécanique, 332, 849–858 (2004). B. Castagnède, M. Saeid, A. Moussatov, V. Gusev, V. Tournat, Reflection and transmission at normal incidence onto air-saturated porous materials and direct measurements based on parametric demodulated ultrasonic waves, Ultrasonics, 44, 221–229 (2006).

This paper is part of the work done during the Massfos-project which fits in the framework of the GSTP-3, 2nd announcement opportunity 14638/03/NL/PA of ESA (European Space Agency). GENERAL INTRODUCTION During the last decades, there has been an increased use of fibre-reinforced composite materials for aerospace and space applications, thanks to their high strength and stiffness for low weight and their excellent corrosion resistance. ‘Damage tolerant’ design of such structures necessitates permanent monitoring of the stresses or strains and the temperature in the composite material.

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