Results 41 to 50 of about 63,045 (293)
Dynamic Nonlinearity in Piezoelectric Flexural Ultrasonic Transducers [PDF]
IEEE Sensors Journal, 2019 The flexural ultrasonic transducer is a unimorph device which typically comprises a piezoelectric ceramic bonded to a metallic membrane. It is widely applied in industrial applications for metrology and proximity sensing. However, the electromechanical and dynamic characteristics of this class of transducer have only recently been reported, and the ...
Andrew Feeney +4 more
openaire +2 more sources
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 +4 more
doaj +1 more source
Applied Sciences, 2020 In this research, some nondestructive ultrasonic techniques were employed to inquire into the effect of microstructural changes induced by thermal aging and cold work on the ultrasonic response. As thermal embrittlement is a risk to the safety of nuclear
Yu-Ju Lin +2 more
doaj +1 more source
Crack Detection of Threaded Steel Rods Based on Ultrasonic Guided Waves
Sensors, 2022 Fatigue cracks are typical damage of threaded steel rods under dynamic loads. This paper presents a study on ultrasonic guided waves-based, fatigue-crack detection of threaded rods.
Kunhong Peng +4 more
doaj +1 more source
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 +5 more
doaj +1 more source
Numerical Simulation of Nonlinear Lamb Waves Used in a Thin Plate for Detecting Buried Micro-Cracks
Sensors, 2014 Compared with conventional linear ultrasonic inspection methods, which are sensitive only to severe defects, nonlinear ultrasonic inspection methods are better for revealing micro-cracks in thin plates.
Xiang Wan +3 more
doaj +1 more source
Metals, 2021 This work presents a non-destructive method for quantitative essessment of fatigue damage of materials with linear elastic properties using nonlinear ultrasonic techniques.
Jeongnam Kim +3 more
doaj +1 more source
Strongly Nonlinear Waves in Polymer Based Phononic Crystals [PDF]
, 2006 One dimensional "sonic vacuum"-type phononic crystals were assembled from chains of polytetrafluoroethylene (PTFE) beads and Parylene coated spheres with different diameters. It was demonstrated for the first time that these polymer-based granular system,
Daraio, C. +3 more
core +1 more source
Factors of Nonlinear-ultrasonic Detection and Its Application to HR3C Fireside Corrosion
Cailiao gongcheng, 2016 Based on the discussion of the factors influencing the nonlinear ultrasonic testing, the feasibility of nondestructive evaluation of HR3C fireside corrosion was investigated using nonlinear ultrasonic testing.
QIN Peng +4 more
doaj +1 more source
Triple correlation for detection of damage-related nonlinearities in composite structures [PDF]
, 2015 Nonlinear effects in vibration responses are investigated for the undamaged composite plate and the composite plate with a delamination. The analysis is focused on higher harmonic generation in vibration responses for various excitation amplitude levels.
Aymerich, F. +6 more
core +2 more sources