Surface breaking crack sizing method using pulse-echo Rayleigh waves
Ultrasonics. 2023 Dec 29;138:107232. doi: 10.1016/j.ultras.2023.107232. Online ahead of print.ABSTRACTSurface cracks are common in various industries. Eddy current testing (ECT) is commonly used for crack sizing but necessitates complex calibration standards and a highly trained inspector. Moreover, for large-area inspections, it requires additional scanning arrangements. In recent years the wedge technique-based Rayleigh wave crack sizing method has attracted significant research interest due to its unidirectional excitability. However, Rayleigh wave features generated at crack tips are often weak and masked under noise, ...
Source: Ultrasonics - January 6, 2024 Category: Physics Authors: Bhupesh Verma Pierre B élanger Source Type: research
Feasibility of in vitro calcification plaque disruption using ultrasound-induced microbubble inertial cavitation
This study proposed a columnar US transducer with a novel design to generate inertial cavitation at the lesion site. Experiments were carried out using tubular calcification phantom to mimic calcified plaques. After different parameters of US + MBs treatment (four types of MBs concentration, five types of cycle number, and three types of insonication duration; n = 4 in each group), inflation experiments were performed to examine the efficacy of cavitation for a clinically used balloon catheter. Finally, micro-CT was used to investigate changes in the internal structure of the tubular plaster phantoms. The inflation thresho...
Source: Ultrasonics - January 6, 2024 Category: Physics Authors: Ching-Hsiang Fan Chieh-Yu Tsai Chun-Yen Lai Ya-Fu Liou Jen-Kuang Lee Chih-Kuang Yeh Source Type: research
Ultrasonic fatigue of unfilled and carbon nanotube (CNT) reinforced polyetheretherketone (PEEK)
Ultrasonics. 2023 Dec 30;138:107236. doi: 10.1016/j.ultras.2023.107236. Online ahead of print.ABSTRACTFatigue properties of polyetheretherketone (PEEK) and multiwall carbon nanotube (CNT) reinforced PEEK were investigated with the ultrasonic fatigue testing method. Lifetimes were measured in the high and very high cycle fatigue regime at resonance frequency 19 kHz and load ratio R = -1. Pulse-pause loading served to avoid specimen self-heating and led to effective cycling frequencies in the range from several hundred Hz to about two kHz. Stress amplitude for 50 % fracture probability at 109 cycles is 21.2 ± 4.3 MPa for un...
Source: Ultrasonics - January 6, 2024 Category: Physics Authors: Michael Fitzka Bernd M Sch önbauer Viktor Stojanovic Harald Rennhofer Helga Lichtenegger Jason W Carroll Niloofar Sanaei Javed Mapkar Herwig Mayer Source Type: research
Surface breaking crack sizing method using pulse-echo Rayleigh waves
Ultrasonics. 2023 Dec 29;138:107232. doi: 10.1016/j.ultras.2023.107232. Online ahead of print.ABSTRACTSurface cracks are common in various industries. Eddy current testing (ECT) is commonly used for crack sizing but necessitates complex calibration standards and a highly trained inspector. Moreover, for large-area inspections, it requires additional scanning arrangements. In recent years the wedge technique-based Rayleigh wave crack sizing method has attracted significant research interest due to its unidirectional excitability. However, Rayleigh wave features generated at crack tips are often weak and masked under noise, ...
Source: Ultrasonics - January 6, 2024 Category: Physics Authors: Bhupesh Verma Pierre B élanger Source Type: research
Feasibility of in vitro calcification plaque disruption using ultrasound-induced microbubble inertial cavitation
This study proposed a columnar US transducer with a novel design to generate inertial cavitation at the lesion site. Experiments were carried out using tubular calcification phantom to mimic calcified plaques. After different parameters of US + MBs treatment (four types of MBs concentration, five types of cycle number, and three types of insonication duration; n = 4 in each group), inflation experiments were performed to examine the efficacy of cavitation for a clinically used balloon catheter. Finally, micro-CT was used to investigate changes in the internal structure of the tubular plaster phantoms. The inflation thresho...
Source: Ultrasonics - January 6, 2024 Category: Physics Authors: Ching-Hsiang Fan Chieh-Yu Tsai Chun-Yen Lai Ya-Fu Liou Jen-Kuang Lee Chih-Kuang Yeh Source Type: research
Ultrasonic fatigue of unfilled and carbon nanotube (CNT) reinforced polyetheretherketone (PEEK)
Ultrasonics. 2023 Dec 30;138:107236. doi: 10.1016/j.ultras.2023.107236. Online ahead of print.ABSTRACTFatigue properties of polyetheretherketone (PEEK) and multiwall carbon nanotube (CNT) reinforced PEEK were investigated with the ultrasonic fatigue testing method. Lifetimes were measured in the high and very high cycle fatigue regime at resonance frequency 19 kHz and load ratio R = -1. Pulse-pause loading served to avoid specimen self-heating and led to effective cycling frequencies in the range from several hundred Hz to about two kHz. Stress amplitude for 50 % fracture probability at 109 cycles is 21.2 ± 4.3 MPa for un...
Source: Ultrasonics - January 6, 2024 Category: Physics Authors: Michael Fitzka Bernd M Sch önbauer Viktor Stojanovic Harald Rennhofer Helga Lichtenegger Jason W Carroll Niloofar Sanaei Javed Mapkar Herwig Mayer Source Type: research
Surface breaking crack sizing method using pulse-echo Rayleigh waves
Ultrasonics. 2023 Dec 29;138:107232. doi: 10.1016/j.ultras.2023.107232. Online ahead of print.ABSTRACTSurface cracks are common in various industries. Eddy current testing (ECT) is commonly used for crack sizing but necessitates complex calibration standards and a highly trained inspector. Moreover, for large-area inspections, it requires additional scanning arrangements. In recent years the wedge technique-based Rayleigh wave crack sizing method has attracted significant research interest due to its unidirectional excitability. However, Rayleigh wave features generated at crack tips are often weak and masked under noise, ...
Source: Ultrasonics - January 6, 2024 Category: Physics Authors: Bhupesh Verma Pierre B élanger Source Type: research
Feasibility of in vitro calcification plaque disruption using ultrasound-induced microbubble inertial cavitation
This study proposed a columnar US transducer with a novel design to generate inertial cavitation at the lesion site. Experiments were carried out using tubular calcification phantom to mimic calcified plaques. After different parameters of US + MBs treatment (four types of MBs concentration, five types of cycle number, and three types of insonication duration; n = 4 in each group), inflation experiments were performed to examine the efficacy of cavitation for a clinically used balloon catheter. Finally, micro-CT was used to investigate changes in the internal structure of the tubular plaster phantoms. The inflation thresho...
Source: Ultrasonics - January 6, 2024 Category: Physics Authors: Ching-Hsiang Fan Chieh-Yu Tsai Chun-Yen Lai Ya-Fu Liou Jen-Kuang Lee Chih-Kuang Yeh Source Type: research
Ultrasonic fatigue of unfilled and carbon nanotube (CNT) reinforced polyetheretherketone (PEEK)
Ultrasonics. 2023 Dec 30;138:107236. doi: 10.1016/j.ultras.2023.107236. Online ahead of print.ABSTRACTFatigue properties of polyetheretherketone (PEEK) and multiwall carbon nanotube (CNT) reinforced PEEK were investigated with the ultrasonic fatigue testing method. Lifetimes were measured in the high and very high cycle fatigue regime at resonance frequency 19 kHz and load ratio R = -1. Pulse-pause loading served to avoid specimen self-heating and led to effective cycling frequencies in the range from several hundred Hz to about two kHz. Stress amplitude for 50 % fracture probability at 109 cycles is 21.2 ± 4.3 MPa for un...
Source: Ultrasonics - January 6, 2024 Category: Physics Authors: Michael Fitzka Bernd M Sch önbauer Viktor Stojanovic Harald Rennhofer Helga Lichtenegger Jason W Carroll Niloofar Sanaei Javed Mapkar Herwig Mayer Source Type: research
Surface breaking crack sizing method using pulse-echo Rayleigh waves
Ultrasonics. 2023 Dec 29;138:107232. doi: 10.1016/j.ultras.2023.107232. Online ahead of print.ABSTRACTSurface cracks are common in various industries. Eddy current testing (ECT) is commonly used for crack sizing but necessitates complex calibration standards and a highly trained inspector. Moreover, for large-area inspections, it requires additional scanning arrangements. In recent years the wedge technique-based Rayleigh wave crack sizing method has attracted significant research interest due to its unidirectional excitability. However, Rayleigh wave features generated at crack tips are often weak and masked under noise, ...
Source: Ultrasonics - January 6, 2024 Category: Physics Authors: Bhupesh Verma Pierre B élanger Source Type: research
Feasibility of in vitro calcification plaque disruption using ultrasound-induced microbubble inertial cavitation
This study proposed a columnar US transducer with a novel design to generate inertial cavitation at the lesion site. Experiments were carried out using tubular calcification phantom to mimic calcified plaques. After different parameters of US + MBs treatment (four types of MBs concentration, five types of cycle number, and three types of insonication duration; n = 4 in each group), inflation experiments were performed to examine the efficacy of cavitation for a clinically used balloon catheter. Finally, micro-CT was used to investigate changes in the internal structure of the tubular plaster phantoms. The inflation thresho...
Source: Ultrasonics - January 6, 2024 Category: Physics Authors: Ching-Hsiang Fan Chieh-Yu Tsai Chun-Yen Lai Ya-Fu Liou Jen-Kuang Lee Chih-Kuang Yeh Source Type: research
Ultrasonic fatigue of unfilled and carbon nanotube (CNT) reinforced polyetheretherketone (PEEK)
Ultrasonics. 2023 Dec 30;138:107236. doi: 10.1016/j.ultras.2023.107236. Online ahead of print.ABSTRACTFatigue properties of polyetheretherketone (PEEK) and multiwall carbon nanotube (CNT) reinforced PEEK were investigated with the ultrasonic fatigue testing method. Lifetimes were measured in the high and very high cycle fatigue regime at resonance frequency 19 kHz and load ratio R = -1. Pulse-pause loading served to avoid specimen self-heating and led to effective cycling frequencies in the range from several hundred Hz to about two kHz. Stress amplitude for 50 % fracture probability at 109 cycles is 21.2 ± 4.3 MPa for un...
Source: Ultrasonics - January 6, 2024 Category: Physics Authors: Michael Fitzka Bernd M Sch önbauer Viktor Stojanovic Harald Rennhofer Helga Lichtenegger Jason W Carroll Niloofar Sanaei Javed Mapkar Herwig Mayer Source Type: research
Study on ultrasonic quantitative evaluation technique based on BP neural network and D-S evidence theory
Ultrasonics. 2023 Dec 31;138:107235. doi: 10.1016/j.ultras.2023.107235. Online ahead of print.ABSTRACTUltrasonic detection technology is widely used because of its high sensitivity, strong penetrating ability, accurate defect location, simple operation, and harmlessness to the human body. However, it is still challenging to locate and quantify the defects whose shapes are complex based on ultrasonic testing. The amount of data required for ultrasonic imaging is relatively large, and the efficiency is relatively low. This paper proposes a new method that combines the BP neural network and D-S evidence theory fusion technolo...
Source: Ultrasonics - January 5, 2024 Category: Physics Authors: Kai Yao Xinglong Li Zhaoxu Lu Source Type: research
Study on ultrasonic quantitative evaluation technique based on BP neural network and D-S evidence theory
Ultrasonics. 2023 Dec 31;138:107235. doi: 10.1016/j.ultras.2023.107235. Online ahead of print.ABSTRACTUltrasonic detection technology is widely used because of its high sensitivity, strong penetrating ability, accurate defect location, simple operation, and harmlessness to the human body. However, it is still challenging to locate and quantify the defects whose shapes are complex based on ultrasonic testing. The amount of data required for ultrasonic imaging is relatively large, and the efficiency is relatively low. This paper proposes a new method that combines the BP neural network and D-S evidence theory fusion technolo...
Source: Ultrasonics - January 5, 2024 Category: Physics Authors: Kai Yao Xinglong Li Zhaoxu Lu Source Type: research
A Direct Wavepath-based Element Localization Algorithm to Enable Flexible Ultrasound Array Imaging
In this study, the total focusing method with full matrix capture is used as a testbed code to demonstrate the benefits of the relative array element localization algorithm. The algorithm is verified by simulation and experimentation.PMID:38176287 | DOI:10.1016/j.ultras.2023.107228 (Source: Ultrasonics)
Source: Ultrasonics - January 4, 2024 Category: Physics Authors: C L Willey V W Chen A T Juhl Source Type: research
