In this section
@inproceedings{Egerton:2015:10.1063/1.4940586,
author = {Egerton, JS and Lowe, MJS and Halai, HV and Huthwaite, P},
doi = {10.1063/1.4940586},
publisher = {American Institute of Physics (AIP)},
title = {Improved FE Simulation of Ultrasound in Plastics},
url = {http://dx.doi.org/10.1063/1.4940586},
year = {2015}
}
TY - CPAPER
AB - Some UK and US nuclear power stations have begun introducing high-density polyethylene (HDPE) pipes to certain cooling water circuits. HDPE offers improved performance over existing pipe materials, such as cast iron, by not corroding in-ternally or externally, yet occasional defects form in HDPE pipe fusion joints at the production stage. This necessitates suitable volumetric NDE to safely and reliably assess joint integrity. Ultrasonic NDE is the most viable current technique, but improved inspection capability is needed, given that the challenges of NDE of plastics differ significantly from those of metals. This also necessitates an accurate and reliable wave propagation simulation technique, such as finite-element (FE) modelling. Accurate FE modelling of ultrasound in high-density polyethylene (HDPE) must account for frequency-dependent behaviour but, the most ap-parent way to do so – frequency domain FE modelling – is prohibitively computationally expensive and potentially impossible to solve for all but the smallest models. Here we present a multiband time domain FE simulation technique to address this. The proposed multiband technique is a computationally efficient and accurate approach to time domain FE modelling of ultrasonic wave propagation. It could, for example, be used to validate the NDE of a large range of candidate fusion joint defects in HDPE. The proposed model uses a small number of time domain FE simulations at individual frequency bands that together cover the bandwidth of interest. The frequency dependence of acoustic properties of ultrasound is accurately represented for HDPE and could readily be applied to other media.
AU - Egerton,JS
AU - Lowe,MJS
AU - Halai,HV
AU - Huthwaite,P
DO - 10.1063/1.4940586
PB - American Institute of Physics (AIP)
PY - 2015///
SN - 1551-7616
TI - Improved FE Simulation of Ultrasound in Plastics
UR - http://dx.doi.org/10.1063/1.4940586
UR - http://hdl.handle.net/10044/1/32661
ER -