Results 21 to 30 of about 19,778 (259)

Nonlinear Ultrasonic Characterization for Intergranular Corrosion Susceptibility of 304 Austenitic Stainless Steel

Cailiao gongcheng, 2017
The variation law of nonlinear ultrasonic parameters for the samples sensitized at 650℃ for 2, 6, 10h was discussed using nonlinear ultrasonic testing technique and XRD pattern as well as microstructure.
HOU Tian-yu, LI Ping, CHEN Lei, ZHAO Jie, LI Ting-ju   +4 more
doaj   +1 more source

Weakly nonlinear propagation of focused ultrasound in bubbly liquids with a thermal effect: Derivation of two cases of Khokolov–Zabolotskaya–Kuznetsoz equations

Ultrasonics Sonochemistry, 2022
A physico-mathematical model composed of a single equation that consistently describes nonlinear focused ultrasound, bubble oscillations, and temperature fluctuations is theoretically proposed for microbubble-enhanced medical applications.
Shunsuke Kagami, Tetsuya Kanagawa
doaj   +1 more source

Carbonation assessment in concrete by nonlinear ultrasound

Cement and Concrete Research, 2011
The carbonation process results in a change in the elastic properties of concrete, resulting in a variation of standard acoustic indicators such as wave speed. However, this evolution is too low to ensure an efficient carbonation assessment. The present communication focuses on the feasibility of carbonation assessment in concrete by applying Nonlinear
Bouchaala, Fateh, Payan, Cédric, Garnier, Vincent, Balayssac, Jean-Paul   +3 more
openaire   +2 more sources

Assessment of Material Dislocation Damage by Nonlinear Ultrasound [PDF]

MATEC Web of Conferences, 2020
Under harsh environment or during service, the mechanical properties of materials or structure will deteriorate. Most of the simulations exhibit the phenomenon of nonlinearity by introducing the actual small defects, without considering dislocation.
Zhan Zaifu, Wang Shen, Huang Songling, Zheng Yang, Wang Fuping, Zhao Wei   +5 more
doaj   +1 more source

Low-Intensity Pulsed Ultrasound Stimulation Modulates the Nonlinear Dynamics of Local Field Potentials in Temporal Lobe Epilepsy

Frontiers in Neuroscience, 2019
Low-intensity pulsed ultrasound stimulation (LIPUS) can inhibit seizures associated with temporal lobe epilepsy (TLE), which is the most common epileptic syndrome in adults and accounts for more than half of the cases of intractable epilepsy ...
Xin Li, Huifang Yang, Jiaqing Yan, Xingran Wang, Xiaoli Li, Yi Yuan   +5 more
doaj   +1 more source

Nonlinear ultrasonic characterization of γ΄ phase evolution in DZ411 alloy after long-term aging

Cailiao gongcheng
To explore the feasibility of the nonlinear ultrasonic method in the aging microstructure evolution application of directionally solidified nickel-based superalloy， DZ411 directionally solidified nickel-based superalloy is studied.The microstructure ...
YANG Gangzhengliang, LI Ping, CAO Tieshan, ZHAO Jie   +3 more
doaj   +1 more source

Characterization of ultrasonic nonlinear properties of interfacial pressure in 110kV integral prefabricated cable intermediate joints

Frontiers in Physics
The interfacial pressure between cable accessories and cable insulation plays a decisive role in the insulation characteristics of the accessories and the long-term reliable operation of the cable.
Benhong Ouyang, Benhong Ouyang, Rong Xia, Rong Xia, Yuli Wang, Yuli Wang, Jianjun Yuan, Jianjun Yuan, Kaiwen Huang, Kaiwen Huang, Peng Zhao, Peng Zhao, Ge Wang, Ge Wang   +13 more
doaj   +1 more source

Quantitative Nonlinear Contrast-Enhanced Ultrasound of the Breast [PDF]

American Journal of Roentgenology, 2016
Breast cancer is the most frequent type of cancer among women (25% of all cancers). The angiogenic process that fuels the growth of tumors is a potential early indicator for differentiating between malignant and benign tumors. Recently, the use of microbubble-based contrast agents combined with ultrasound has allowed the development of contrast agent ...
Anush, Sridharan, John R, Eisenbrey, Jaydev K, Dave, Flemming, Forsberg   +3 more
openaire   +2 more sources

Simulating the Nonlinear Propagation Effects in Biological Materials Using Westervelt Equation [PDF]

Assiut University Journal of Multidisciplinary Scientific Research
Nonlinear acoustics has been a topic of research in the last years. Driven by a wide range and a large number of highly relevant industrial and medical applications, this area has expanded enormously in the last few decades. Numerical modeling of medical
Esraa rabie, galal hassan, Mohamed Sayed Ali   +2 more
doaj   +1 more source

Non destructive characterization of cortical bone micro-damage by nonlinear resonant ultrasound spectroscopy. [PDF]

PLoS ONE, 2014
The objective of the study was to evaluate the ability of a nonlinear ultrasound technique, the so-called nonlinear resonant ultrasound spectroscopy (NRUS) technique, for detecting early microdamage accumulation in cortical bone induced by four-point ...
Sylvain Haupert, Sandra Guérard, Françoise Peyrin, David Mitton, Pascal Laugier   +4 more
doaj   +1 more source