STOYKO, Darryl Keith;POPPLEWELL, Neil ;SHAH, Arvind H.. Reflection and Transmission Coefficients from Rectangular Notches in Pipes. Strojniški vestnik - Journal of Mechanical Engineering, [S.l.], v. 60, n.5, p. 349-362, june 2018. ISSN 0039-2480. Available at: <https://www.sv-jme.eu/article/reflection-and-transmission-coefficients-from-rectangular-notches-in-pipes/>. Date accessed: 19 dec. 2024. doi:http://dx.doi.org/10.5545/sv-jme.2014.1836.
Stoyko, D., Popplewell, N., & Shah, A. (2014). Reflection and Transmission Coefficients from Rectangular Notches in Pipes. Strojniški vestnik - Journal of Mechanical Engineering, 60(5), 349-362. doi:http://dx.doi.org/10.5545/sv-jme.2014.1836
@article{sv-jmesv-jme.2014.1836,
author = {Darryl Keith Stoyko and Neil Popplewell and Arvind H. Shah},
title = {Reflection and Transmission Coefficients from Rectangular Notches in Pipes},
journal = {Strojniški vestnik - Journal of Mechanical Engineering},
volume = {60},
number = {5},
year = {2014},
keywords = {Pipe, Notch, Cutoff Frequency, Singularity, Guided Waves},
abstract = {The use of a single, non-dispersive ultrasonic guided wave mode is one important approach to monitoring a structure’s health. It is advantageously non-destructive with the ability of propagating over tens of metres to detect a hidden defect. The dimensional assessment of a defect, on the other hand, requires reflection coefficients for two or more such modes. Multiple modes may be excited simultaneously by applying a short pulse to a structure’s external surface. This situation is examined here for a circular, hollow and homogeneous, isotropic pipe having negligible damping and an open rectangular notch. A finite element model is employed in a region around a notch. It is coupled to a wave function expansion in the two adjacent, effectively, semi-infinite pipes. Representative longitudinal and flexural modes are investigated for different notch dimensions. A nonaxisymmetric notch, unlike an axisymmetric notch, introduces a plethora of cross modal couplings that lead to more singularities in a reflection coefficient’s frequency dependence. There is, however, a common pattern to these distinctive singularities. It is conjectured that singularities corresponding to propagating modes may enable a notch to be detected and its dimensions determined.},
issn = {0039-2480}, pages = {349-362}, doi = {10.5545/sv-jme.2014.1836},
url = {https://www.sv-jme.eu/article/reflection-and-transmission-coefficients-from-rectangular-notches-in-pipes/}
}
Stoyko, D.,Popplewell, N.,Shah, A. 2014 June 60. Reflection and Transmission Coefficients from Rectangular Notches in Pipes. Strojniški vestnik - Journal of Mechanical Engineering. [Online] 60:5
%A Stoyko, Darryl Keith %A Popplewell, Neil %A Shah, Arvind H. %D 2014 %T Reflection and Transmission Coefficients from Rectangular Notches in Pipes %B 2014 %9 Pipe, Notch, Cutoff Frequency, Singularity, Guided Waves %! Reflection and Transmission Coefficients from Rectangular Notches in Pipes %K Pipe, Notch, Cutoff Frequency, Singularity, Guided Waves %X The use of a single, non-dispersive ultrasonic guided wave mode is one important approach to monitoring a structure’s health. It is advantageously non-destructive with the ability of propagating over tens of metres to detect a hidden defect. The dimensional assessment of a defect, on the other hand, requires reflection coefficients for two or more such modes. Multiple modes may be excited simultaneously by applying a short pulse to a structure’s external surface. This situation is examined here for a circular, hollow and homogeneous, isotropic pipe having negligible damping and an open rectangular notch. A finite element model is employed in a region around a notch. It is coupled to a wave function expansion in the two adjacent, effectively, semi-infinite pipes. Representative longitudinal and flexural modes are investigated for different notch dimensions. A nonaxisymmetric notch, unlike an axisymmetric notch, introduces a plethora of cross modal couplings that lead to more singularities in a reflection coefficient’s frequency dependence. There is, however, a common pattern to these distinctive singularities. It is conjectured that singularities corresponding to propagating modes may enable a notch to be detected and its dimensions determined. %U https://www.sv-jme.eu/article/reflection-and-transmission-coefficients-from-rectangular-notches-in-pipes/ %0 Journal Article %R 10.5545/sv-jme.2014.1836 %& 349 %P 14 %J Strojniški vestnik - Journal of Mechanical Engineering %V 60 %N 5 %@ 0039-2480 %8 2018-06-28 %7 2018-06-28
Stoyko, Darryl, Neil Popplewell, & Arvind H. Shah. "Reflection and Transmission Coefficients from Rectangular Notches in Pipes." Strojniški vestnik - Journal of Mechanical Engineering [Online], 60.5 (2014): 349-362. Web. 19 Dec. 2024
TY - JOUR AU - Stoyko, Darryl Keith AU - Popplewell, Neil AU - Shah, Arvind H. PY - 2014 TI - Reflection and Transmission Coefficients from Rectangular Notches in Pipes JF - Strojniški vestnik - Journal of Mechanical Engineering DO - 10.5545/sv-jme.2014.1836 KW - Pipe, Notch, Cutoff Frequency, Singularity, Guided Waves N2 - The use of a single, non-dispersive ultrasonic guided wave mode is one important approach to monitoring a structure’s health. It is advantageously non-destructive with the ability of propagating over tens of metres to detect a hidden defect. The dimensional assessment of a defect, on the other hand, requires reflection coefficients for two or more such modes. Multiple modes may be excited simultaneously by applying a short pulse to a structure’s external surface. This situation is examined here for a circular, hollow and homogeneous, isotropic pipe having negligible damping and an open rectangular notch. A finite element model is employed in a region around a notch. It is coupled to a wave function expansion in the two adjacent, effectively, semi-infinite pipes. Representative longitudinal and flexural modes are investigated for different notch dimensions. A nonaxisymmetric notch, unlike an axisymmetric notch, introduces a plethora of cross modal couplings that lead to more singularities in a reflection coefficient’s frequency dependence. There is, however, a common pattern to these distinctive singularities. It is conjectured that singularities corresponding to propagating modes may enable a notch to be detected and its dimensions determined. UR - https://www.sv-jme.eu/article/reflection-and-transmission-coefficients-from-rectangular-notches-in-pipes/
@article{{sv-jme}{sv-jme.2014.1836},
author = {Stoyko, D., Popplewell, N., Shah, A.},
title = {Reflection and Transmission Coefficients from Rectangular Notches in Pipes},
journal = {Strojniški vestnik - Journal of Mechanical Engineering},
volume = {60},
number = {5},
year = {2014},
doi = {10.5545/sv-jme.2014.1836},
url = {https://www.sv-jme.eu/article/reflection-and-transmission-coefficients-from-rectangular-notches-in-pipes/}
}
TY - JOUR AU - Stoyko, Darryl Keith AU - Popplewell, Neil AU - Shah, Arvind H. PY - 2018/06/28 TI - Reflection and Transmission Coefficients from Rectangular Notches in Pipes JF - Strojniški vestnik - Journal of Mechanical Engineering; Vol 60, No 5 (2014): Strojniški vestnik - Journal of Mechanical Engineering DO - 10.5545/sv-jme.2014.1836 KW - Pipe, Notch, Cutoff Frequency, Singularity, Guided Waves N2 - The use of a single, non-dispersive ultrasonic guided wave mode is one important approach to monitoring a structure’s health. It is advantageously non-destructive with the ability of propagating over tens of metres to detect a hidden defect. The dimensional assessment of a defect, on the other hand, requires reflection coefficients for two or more such modes. Multiple modes may be excited simultaneously by applying a short pulse to a structure’s external surface. This situation is examined here for a circular, hollow and homogeneous, isotropic pipe having negligible damping and an open rectangular notch. A finite element model is employed in a region around a notch. It is coupled to a wave function expansion in the two adjacent, effectively, semi-infinite pipes. Representative longitudinal and flexural modes are investigated for different notch dimensions. A nonaxisymmetric notch, unlike an axisymmetric notch, introduces a plethora of cross modal couplings that lead to more singularities in a reflection coefficient’s frequency dependence. There is, however, a common pattern to these distinctive singularities. It is conjectured that singularities corresponding to propagating modes may enable a notch to be detected and its dimensions determined. UR - https://www.sv-jme.eu/article/reflection-and-transmission-coefficients-from-rectangular-notches-in-pipes/
Stoyko, Darryl, Popplewell, Neil, AND Shah, Arvind. "Reflection and Transmission Coefficients from Rectangular Notches in Pipes" Strojniški vestnik - Journal of Mechanical Engineering [Online], Volume 60 Number 5 (28 June 2018)
Strojniški vestnik - Journal of Mechanical Engineering 60(2014)5, 349-362
© The Authors, CC-BY 4.0 Int. Change in copyright policy from 2022, Jan 1st.
The use of a single, non-dispersive ultrasonic guided wave mode is one important approach to monitoring a structure’s health. It is advantageously non-destructive with the ability of propagating over tens of metres to detect a hidden defect. The dimensional assessment of a defect, on the other hand, requires reflection coefficients for two or more such modes. Multiple modes may be excited simultaneously by applying a short pulse to a structure’s external surface. This situation is examined here for a circular, hollow and homogeneous, isotropic pipe having negligible damping and an open rectangular notch. A finite element model is employed in a region around a notch. It is coupled to a wave function expansion in the two adjacent, effectively, semi-infinite pipes. Representative longitudinal and flexural modes are investigated for different notch dimensions. A nonaxisymmetric notch, unlike an axisymmetric notch, introduces a plethora of cross modal couplings that lead to more singularities in a reflection coefficient’s frequency dependence. There is, however, a common pattern to these distinctive singularities. It is conjectured that singularities corresponding to propagating modes may enable a notch to be detected and its dimensions determined.