On the acoustoelastic effect

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Web1 de nov. de 2010 · The most sensitive waves to stress level are the longitudinal and transversal waves polarized along the loading direction. Acoustoelastic constants have … Web7 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 …

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WebThe velocity measurements are processed either by determining a fractional change in the measured acoustic velocity and dividing that fractional change by the change in borehole pressure to provide frequency dependent acoustoelastic coefficients, or by determining the fractional change in the measured acoustic velocity, and subtracting from the fractional … 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 … opw login

The acoustoelastic effect in prestressing tendons - NASA/ADS

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. WebThe 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 Web3 de fev. de 2024 · Consequently, the acoustoelastic effect of guided waves should be further investigated [4–6]. As the diversity of the mode and the complexity of wave motion, the acoustoelastic effects of guided waves are mostly concentrated in the plate structure, such as Lamb wave, SH wave and Rayleigh wave. opw loading systems catalog

Theoretical study of acoustoelastic effects caused by plastic ...

Acoustoelastic effect - Wikipedia

Web5 de jan. de 2024 · Rail stresses can be determined using various non-destructive testing (NDT) methods, with the most common being ultrasonic scanning (US). Recent studies examined the use of the acoustoelastic effect for this purpose [1,2,3,4].Acoustoelastic stress monitoring is based on measuring the properties of elastic waves propagating in … WebThe 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. portsmouth harbor nhWebThe physics of sonic wave propagation in deformed materials and acoustoelastic effects are discussed, and a feasible experiment is suggested for early diagnosis of plastic … opw leap reporting

"WebEarly detection and monitoring of heavy load induced plastic deformation in the structure is crucial for timely intervention before cracking occurs and the material completely fails. Ultrasound can be used for detecting plastic deformation provided " - On the acoustoelastic effect

On the acoustoelastic effect

Bibo Zhong - Postdoctoral Researcher - Idaho National …

Web1 de mar. de 2024 · Acoustoelastic effect simulation with a two-stage approach. Acoustoelastic effect requires static analysis to obtain an initial stress field and … WebCOMSOL modelling of the acoustoelastic effect N J Watson 1, T Hazlehurst , M J W Povey , A Drennan 2, P Seaman . 1. School of Food Science and Nutrition, University of …

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WebAbstract : The acoustoelastic effect for Rayleigh waves on the inner diameter of a right circular steel cylinder was investigated. The velocity dependence on stress was studied … WebThe acoustoelastic effects of elastic and elastic-plastic deformations in rocks caused by static stresses are discussed by numerical results in detail. Acoustoelastic effects of …

WebAbstract : The acoustoelastic effect for Rayleigh waves on the inner diameter of a right circular steel cylinder was investigated. The velocity dependence on stress was studied as a function of frequency. As expected, the change in velocity was proportional to the applied stress at the surface. As a result of the nonuniformity of the applied stress field, however, … Web26 de ago. de 1998 · A simple method is presented for obtaining the stress tensor for small displacements in nonlinearly strained material. The physics of sonic wave propagation in …

WebAbstract: This paper reports, for the first time, the sensitivity deterioration phenomenon of surface acoustic wave (SAW) sensors for distortion, load, or pressure monitoring. … 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 …

WebAn 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 …

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 … portsmouth harbour google mapsWeb1 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 … portsmouth harbour marine cicWeb20 de mar. de 2024 · Abstract. The work is devoted to study of acoustoelastic effect in case of elasto-plastic deformation of initially anisotropic metals. The velocities of bulk shear waves under monotonic growth of inelastic deformations were experimentally studied. The values of acoustic anisotropy for cold-rolled aluminum sheet were obtained. opw legislationWebAcoustoelastic effect The acoustoelastic effect, which describes the depen-dence of the speed of an elastic wave on the stress state of the medium, received significant attention in the mid-1950s.17,18 However, the focus has been on the change in bulk-wave speeds, rather than guided waves due to difficulties in incorporating the free-surface portsmouth harbor lighthouse new castleWeb10 de abr. de 2024 · Acoustoelastic Effect. R. A. Toupin and B. Bernstein. ... We propose a modification of the standard acoustoelastic theory, introducing the concept of conditioning induced non-equilibrium strain, which allows us to predict the evolution of elastic wave velocity in both quasi-static and dynamic ranges, ... portsmouth harbor toursWeb30 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. opw lubesourceWeb13 de fev. de 2024 · Based on the acoustoelastic effect and the wave path summation theory of coda wave interferometry, the model shows that the time shifts of coda waves change linearly with the variations of pre-load. opw labour hire