منابع مشابه
Attenuation of Lamb Waves in CFRP Plates
The paper presents the Lamb wave attenuation of Carbon Fiber Reinforced Plastic (CFRP) plates on the basis of an experimental transmitter-sensor scheme. We measured separately the S0 and A0 Lamb modes of CFRP plates with three different kind of laminate lay-ups; unidirectional [0]8s (and [90]8s), cross-ply [0, 90]4s, and quasi-isotropic [0,45,-45,90]2s. Several ultrasound transmitters were used...
متن کاملLamb Waves and Nearly-Longitudinal Waves in Thick Plates
We discuss waves created in relatively thick plates by edge excitation at frequency-thickness (fd) products that correspond, in principle, to multiple Lamb wave modes. For relatively low values of the fd product it is clear that Lamb wave modes will be generated, while at large values of the fd product we observe a bulk (longitudinal wave) in the solid, but influenced by reflections from the pl...
متن کاملTransition from Lamb waves to longitudinal waves in plates
We use finite element simulations and experiments to examine the excitation of waves in a plate by normal forces applied to an edge. At low values of the frequency-plate thickness product, f·d, multiple Lamb wave modes are excited with different group velocities, but increasing f·d leads to the formation of a train of well-defined nearly-longitudinal pulses. We investigate the transition betwee...
متن کاملLamb Waves in Composite Plates: Tuned Excitation and Diffraction by Obstacles
The paper is devoted to theoretical and experimental investigations of Lamb wave excitation and propagation in multilayered carbon fiber-reinforced plastic plates with obstacles. The theoretical modeling is performed in the context of general linear elasticity for three-dimensional laminate anisotropic media. It is based on the integral and asymptotic representations in terms of Green’s matrix ...
متن کاملUse of Lamb Waves to Monitor Plates: Experiments and Simulations
Lamb waves at ultrasonic frequencies travel with little attenuation in thin elastic plates, and we demonstrate their use in pulse-echo behavior to monitor plate integrity. We envision using a single PZT wafer-type transducer to generate waves and to receive reflections from distant flaw or boundary locations. However, Lamb waves generally have multiple modes, each of them highly dispersive, and...
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ژورنال
عنوان ژورنال: PAMM
سال: 2006
ISSN: 1617-7061,1617-7061
DOI: 10.1002/pamm.200610287