Acoustic Nonlinearity Parameters Due to Microstructural Defects
Sign Up to like & getrecommendations! Published in 2018 at "Acta Mechanica Solida Sinica"
DOI: 10.1007/s10338-018-0053-3
Abstract: This study presents a general approach to derive the acoustic nonlinearity parameters induced by various types of dislocation configurations including dislocation strings (monopoles), dislocation dipoles, dislocation pileups and extended dislocations. It is found that expressions… read more here.
Keywords: parameters due; acoustic nonlinearity; dislocation; nonlinearity parameters ... See more keywords
Influence of cyclic-loading induced fatigue micro-crack growth on generation of nonlinear ultrasonic Lamb waves
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DOI: 10.1007/s10921-021-00792-8
Abstract: Fatigue damage and micro-cracks growth have been proved to be closely related to the nonlinear effect of ultrasonic Lamb waves propagation in materials. In this paper, the relationship among fatigue life, length and width of… read more here.
Keywords: nonlinearity parameter; micro cracks; acoustic nonlinearity; micro ... See more keywords
Acoustic nonlinearity parameter induced by extended dislocations
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Applied Physics"
DOI: 10.1063/1.5046640
Abstract: Excess acoustic nonlinearity is a signature of microstructural defects on a propagating ultrasound. By measuring the excess acoustic nonlinearity parameter, defect characteristics can be inferred nondestructively through ultrasonic techniques. To this end, proper models are… read more here.
Keywords: nonlinearity; acoustic nonlinearity; excess acoustic; extended dislocations ... See more keywords
Contribution of dislocation pileups to acoustic nonlinearity parameter
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Applied Physics"
DOI: 10.1063/1.5095135
Abstract: This paper develops an analytical model to calculate the acoustic nonlinearity parameter induced by dislocation pileups in isotropic elastic solids. It shows that the pileup-induced acoustic nonlinearity parameter depends on the pileup length, number of… read more here.
Keywords: acoustic nonlinearity; dislocation pileups; dislocation; nonlinearity parameter ... See more keywords
Indirect Method for Measuring Absolute Acoustic Nonlinearity Parameter Using Surface Acoustic Waves with a Fully Non-Contact Laser-Ultrasonic Technique
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DOI: 10.3390/app10175911
Abstract: This paper proposes an indirect method to measure absolute acoustic nonlinearity parameters using surface acoustic waves by employing a fully non-contact laser-ultrasonic technique. For this purpose, the relationship between the ratio of relative acoustic nonlinearity… read more here.
Keywords: acoustic nonlinearity; nonlinearity; absolute acoustic; method ... See more keywords
Experimental Verification of Contact Acoustic Nonlinearity at Rough Contact Interfaces
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DOI: 10.3390/ma14112988
Abstract: When a longitudinal wave passes through a contact interface, second harmonic components are generated due to contact acoustic nonlinearity (CAN). The magnitude of the generated second harmonic is related to the contact state of the… read more here.
Keywords: contact acoustic; contact interfaces; acoustic nonlinearity; interface ... See more keywords