On the acoustoelastic effect
Web1 de ago. de 2007 · The acoustoelastic effects of elastic–plastic strains in rocks caused by static deformations, are discussed in detail. The Rayleigh-type and Sezawa modes … Web1 de mar. de 1981 · The acoustoelastic effect is investigated for the Rayleigh surface wave propagating in a homogeneous isotropic material. The initial deformations considered are uniform and nonuniform only in the direction of depth. The formulas for the velocity change versus the change in the applied static stress are derived in the first-order approximation. …
On the acoustoelastic effect
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Web1 de jan. de 1987 · The aim of this work is to investigate the acoustoelastic effect in a thermoplastic polymer (polyamide 6) under uniaxial compression using ultrasonic waves (longitudinal and shear). The acoustic velocities varied linearly, as expected, when small strains or stresses were applied, from which Murnaghan coefficients were obtained for … WebThere are currently more than 130,000 prestressed concrete bridges in the United States and approximately 37,000 of these bridges are more than 30 years old. Steel tendons …
Web29 de jan. de 2015 · This work develops a multiphysics computational model to study the acoustoelastic effect in a three point bending system. A simple linear relationship was utilised to represent the stress effect on the acoustic velocity. The simulation results were compared with experimental results and the same general trend was observed. Web30 de dez. de 2024 · Special Issue Information. The development of global production due to the application of robotic systems in industry and everyday life entails a constant increase in energy demand. Advances in automation systems and robotization arouse the interest of many scientists, including those dealing with energy systems.
WebFrom an experimental point of view, the acoustoelastic effect may be revealed only by very accurate measurements: for each MPa of applied stress, a variation of the ultrasonic velocities of only 0 ... Web12 de set. de 2012 · Acoustoelasticity, or the change in elastic wave speeds with stress, is a well-studied phenomenon for bulk waves. The effect of stress on Lamb waves is not as well understood, although it is clear that anisotropic stresses will produce anisotropy in the Lamb wave dispersion curves. Here the theory of acoustoelastic Lamb wave propagation is …
Web29 de jan. de 2015 · Finally, the acoustoelastic effects in cross-sections of ribbed plate structures with different fillet radii are characterized based on the Degree of …
WebTogether with the simulation result of the static stage, it is conjectured that the acoustoelastic effect results from the stress-dependent elastic modulus. Research article. Sustainability of compressive residual stress on the processing time of water jet peening using ultrasonic power. Heliyon, Volume 4, Issue 8, 2024, Article e00747. how to palpate obturator internusWeb15 de set. de 2024 · Based on the L cr wave acoustoelastic effect, surface stress of laser cladding Fe314 alloy coating after ultrasonic impact treat (UIT) was measured, and relation between L cr wave acoustoelastic coefficient and repetition rate of UIT was discussed in this paper. The laser cladding Fe314 alloy coating was prepared on surface of carbon … my att yahoo email sign inWebAn improved ultrasonic method was developed theoretically and experimentally for plane stress measurement using critically refracted longitudinal (LCR) waves. Cruciform specimen method, combined with a digital image correlation (DIC) method, was applied to confirm the validity of this method. Based on the acoustoelastic theory, LCR waves with arbitrary … my att.net email accounthttp://sistemas.set.eesc.usp.br/producao/1279 how to palpate patellaWebThe acoustoelastic effect has previously been reported in soft materials; see, e.g., (9, 24, 26). Soft materials can undergo large elastic deformations when subject to mechanical stresses, which markedly alter the shear wave speeds (∼100%) but barely change the speed of the longitudinal wave. That is because it only takes my att yahoo homepageWebThe acoustoelastic effect appears in all kinds of ultrasonic waves including longitudinal, transverse and surface waves. For many applications, however, surface stresses are needed and in this case, surface waves are suitable since they only penetrate to a depth of approximately one wavelength. my att.net account sign inWeb7 de set. de 2004 · This paper investigates acoustoelastic effects on guided waves in a fluid-filled pressurized borehole in a biaxial prestressed formation, and develops a … how to palpate midline trachea