Predicting acoustic emission attenuation in small steel blocks using a ray tracing technique

El-Shaib, Mohamed; Reuben, Robert Lewis; Lim, Theodore

doi:10.1784/insi.2012.54.12.673

Cited by 7 publications

(9 citation statements)

References 6 publications

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“…This may be due to many thick flanges for these particular penstocks that appear different from the common design of long pipe sections. El-Shaib [39] reported Lamb wave attenuation on a steel plate, but his signal energy values decreased with 1/√x, implying negative amplitude attenuation. It is likely that his energy data was already converted to amplitude values.…”

Section: Figurementioning

confidence: 96%

Review on Structural Health Evaluation with Acoustic Emission

Ono

2018

Applied Sciences

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This review introduces several areas of importance in acoustic emission (AE) technology, starting from signal attenuation. Signal loss is a critical issue in any large-scale AE monitoring, but few systematic studies have appeared. Information on damping and attenuation has been gathered from metal, polymer, and composite fields to provide a useful method for AE monitoring. This is followed by discussion on source location, bridge monitoring, sensing and signal processing, and pressure vessels and tanks, then special applications are briefly covered. Here, useful information and valuable sources are identified with short comments indicating their significance. It is hoped that readers note developments in areas outside of their own specialty for possible cross-fertilization.

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Section: Figurementioning

confidence: 96%

Review on Structural Health Evaluation with Acoustic Emission

Ono

2018

Applied Sciences

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“…In the tests of surface transmission on synthetic materials and bone, the transmitted energy was measured as a function of the distance to obtain values of the effective material damping, which can usually be expressed 14 by an exponential absorption law:…”

Section: Resultsmentioning

confidence: 99%

“…Calibration was performed 13 back-to-back for three Micro-80D sensors (including the one used in this work) at the same time by positioning them on a circular steel block of diameter 31 cm and height 17 cm. Ten pencil lead breaks were carried out in the centre of the steel block with the sensors arranged around the centre, each at a radial distance of 10 cm.…”

Section: Methodsmentioning

confidence: 99%

Transmission of acoustic emission in bones, implants and dental materials

Ossi

Abdou

Reuben

et al. 2013

Proc Inst Mech Eng H

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There is considerable interest in using acoustic emission (AE) and ultrasound to assess the quality of implant-bone interfaces and to monitor for micro-damage leading to loosening. However, remarkably little work has been done on the transmission of ultrasonic waves though the physical and biological structures involved. The aim of this in vitro study is to assess any differences in transmission between various dental materials and bovine rib bones with various degrees of hydration. Two types of tests have been carried out using pencil lead breaks as a standard AE source. The first set of tests was configured to assess the surface propagation of AE on various synthetic materials compared with fresh bovine rib bone. The second is a set of transmission tests on fresh, dried and hydrated bones each fitted with dental implants with various degrees of fixity, which includes components due to bone and interface transmission. The results indicate that transmission through glass ionomer cement is closest to the bone. This would suggest that complete osseointegration could potentially be simulated using such cement. The transmission of AE energy through bone was found to be dependent on its degree of hydration. It was also found that perfusing samples of fresh bone with water led to an increase in transmitted energy, but this appeared to affect transmission across the interface more than transmission through the bone. These findings have implications not only for implant interface inspection but also for passive AE monitoring of implants.

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“…They red rays into the model and created a series of rules for re ection at boundaries, which depended on the nature of the medium at the boundary (air, water or sand), the object being to understand the effect of phase boundaries on attenuation of AE. For pipes, El-Shaib [22] was able to reproduce the effect of different internal and external environment on the attenuation of AE measured by Shehadeh et al [4].…”

Section: Background On Calculation and Simulation Of Ae In Cylindersmentioning

confidence: 97%

“…El-Shaib et al [21] have carried out a different type of simulation using ray-tracing within a solid model.…”

Section: Background On Calculation and Simulation Of Ae In Cylindersmentioning

confidence: 99%

Measurement and simulation of the propagation of impulsive acoustic emission sources in cylinders, with potential application to pipeline monitoring

Abolle-Okoyeagu

Torralba²,

Chen³

et al. 2023

Preprint

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Acoustic Emission (AE) monitoring of processes, machines and structures consists of using one or more surface-mounted sensor to listen for sources, which could come from structural degradation, process conditions or machine operation. Since real AE sources have a temporal structure, often over the millisecond range or longer, it is of general interest to examine what can be recovered of this temporal structure using an array of sensors of known positions relative to each other. Experiments and simulations were carried out with impulsive sources (pencil-lead breaks) and the propagating AE resulting from these sources was recorded over a period of around 2 seconds for both experiments and simulations. Two test objects were used; a solid steel cylinder to provide a relatively simple and well-studied platform to examine a number of essential principles, and a 2m length of pipe to provide some conclusions relevant to impact monitoring of pipelines. Comparison of the simulated and experimental results indicates that the frequency content of the resulting wave is not very sensitive to unloading rate at the source, although the amplitude of the simulated signal is. Comparison of the first few tens of microseconds of the simulated and experimental waveforms suggests that the first arrival is consistent with a wave speed of around 5000ms− 1. In addition, both simulations and experiments indicate that, in the sizes of the objects examined, reflections at interfaces quickly introduce interference, so the nature of the impulsive part of the source can only reasonably be preserved in the fastest-moving components of the propagating wave and before arrival of any reflections from interfaces.

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Predicting acoustic emission attenuation in small steel blocks using a ray tracing technique

Cited by 7 publications

References 6 publications

Review on Structural Health Evaluation with Acoustic Emission

Review on Structural Health Evaluation with Acoustic Emission

Transmission of acoustic emission in bones, implants and dental materials

Measurement and simulation of the propagation of impulsive acoustic emission sources in cylinders, with potential application to pipeline monitoring

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