铺子
发表于 2025-3-23 10:34:58
https://doi.org/10.1007/978-3-658-22153-9a climatic chamber. Sensors were mounted on the skin of a CFRP sandwich structure which was exposed to temperatures from −50 to +50 °C with the step of 10 ℃. Both A0 and S0 modes were analyzed in the frequency range of 50–300 kHz. Time of flight delays indicating a velocity decrease with increasing
Dendritic-Cells
发表于 2025-3-23 15:53:17
Julia Albert,Herbert Reinke,Michael Wildthat propagate circumferentially around the pipe, known as CSH waves. Typically, a pair of transducers, a transmitter and a receiver, can be used to interrogate the whole circumference. Conventional shear horizontal transducers generate waves that propagate in both directions, namely, clockwise and c
MILK
发表于 2025-3-23 18:42:56
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FRONT
发表于 2025-3-23 22:39:07
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凝乳
发表于 2025-3-24 04:32:47
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自爱
发表于 2025-3-24 09:18:46
Doing Modernity - Doing Religionstructures. The AU technology consists of sending and receiving low frequency acoustic pulses at a predetermined angle of incidence into a material under inspection. Analysis of the detected acoustic-ultrasound waveform characteristics provides a clear representation of the mechanical state of the s
一个姐姐
发表于 2025-3-24 13:48:04
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针叶
发表于 2025-3-24 14:56:51
VideojournalistInnen und das Fernsehpublikumnitoring (SHM) allows to ensure in real-time that aircraft substructures can still perform their function. Among all the technologies used in SHM, the emission/reception of Lamb waves are very popular. Algorithms using Lamb waves for damage detection and localization already exist in the literature
euphoria
发表于 2025-3-24 22:52:16
A Phenomenological Analysis of Approvalte structures. This article develops an accurate and computationally efficient time-domain spectral finite element (SFE) for wave propagation analysis of laminated composite and sandwich beam and panel-type structures based on the efficient layerwise zigzag theory. It considers the axial displacemen
Harness
发表于 2025-3-24 23:53:33
Working the Natural/Artificial Distinctionthe group velocity is required; therefore, determination of accurate dispersion curves is invaluable. However, for complex materials, the wave speed is dependent on the propagation angle. From experimental observations of dispersion curves, measured using a two-dimensional Fourier transform, a syste