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
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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
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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