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Peilu Li, Chunguang Xu, Qinxue Pan, Yuren Lu and Shuangyi Li
According to the acousto elastic effect, the residual stress on the surface of the rail can be evaluated by measuring the change in the propagation velocity of ultrasonic waves, such as longitudinal critically refracted (LCR) waves on the surface of the ...
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Mohammad Ebrahim Bajgholi, Gilles Rousseau, Martin Viens and Denis Thibault
This paper presents the results of a project aimed at evaluating the performance of ultrasonic techniques for detecting flaws in Francis turbine runners. This work is the first phase of a more ambitious program aimed at improving the reliability of inspe...
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Basit Abdul, Vincenzo Mariano Mastronardi, Antonio Qualtieri, Luciana Algieri, Francesco Guido, Francesco Rizzi and Massimo De Vittorio
In this paper, we report on the characterization of the sensitivity and the directionality of a novel ultrasonic hydrophone fabricated by micro-electro-mechanical systems (MEMS) process, using aluminum nitride (AlN) thin film as piezoelectric functional ...
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Luis Domenech, Víctor García-Peñas, Asta ?akalyte, Divya Puthukara Francis, Eskil Skoglund and Fernando Sánchez
Under droplet impingement, surface leading edge protection (LEP) coating materials for wind turbine blades develop high-rate transient pressure build-up and a subsequent relaxation in a range of strain rates. The stress-strain coating LEP behavior at a w...
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Hsiang-Chen Hsu, Shaw-Yuan Wang, Li-Ming Chu
Pág. 51 - 58
In this paper, a 3-D finite element prediction on aluminum pad squeeze during copper wirebonding process for high power IC package is presented. ANSYS Parametric Design Language (APDL) has been implemented on modelling, mesh density, boundary condition (...
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