2009
DOI: 10.1007/s00419-009-0389-8
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Experimental and numerical studies of guided wave damage detection in bars with structural discontinuities

Abstract: This paper deals with longitudinal and flexural wave propagations in steel bars with structural discontinuities. Numerical simulations were performed using the spectral element method and compared with experimental studies conducted on an intact bar as well as on bars with an additional mass, a notch and a grooved weld. To model longitudinal wave propagation including lateral deformations, special rod spectral elements in time domain (based on Love and Mindlin-Herrmann theories) were formulated. The effect of … Show more

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Cited by 35 publications
(34 citation statements)
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“…It has been shown that the single mode theory cannot be sufficient to capture the wave propagation phenomenon for thick beams and/or high frequency wave 22,38 , which is the situation of the current study. Hence the Mindlin-Herrmann theory was correction factors introduced to account both for the non-symmetry of the cross-section and the fact that the actual stresses are not distributed as assumed 37 .…”
Section: Mindlin-herrmann Theorymentioning
confidence: 85%
“…It has been shown that the single mode theory cannot be sufficient to capture the wave propagation phenomenon for thick beams and/or high frequency wave 22,38 , which is the situation of the current study. Hence the Mindlin-Herrmann theory was correction factors introduced to account both for the non-symmetry of the cross-section and the fact that the actual stresses are not distributed as assumed 37 .…”
Section: Mindlin-herrmann Theorymentioning
confidence: 85%
“…It has been demonstrated that wave propagation methods can be efficiently applied in monitoring of the strain changes in reinforced concrete during the process of damage development [10][11][12][13]. Wave propagation signals collected during an experiment conducted on concrete structures are characterized by a greater degree of complexity than for steel thin rods [14] or plates [15] because of the solid geometry of typical concrete element. Damage detection methodologies utilizing wave propagation signals directed to concrete structures require a lot of testing data for different stages of damage.…”
Section: Introductionmentioning
confidence: 99%
“…Spectral elements have been also developed for structural type finite elements like rods, beams or plates (e.g. [14,15,[20][21][22][23][24][25][26][27]), with the attention paid to theoretical aspects of wave propagation phenomena. In paper [28], 3-dimensional spectral elements have been presented, with application to damage detection in metal plate structures.…”
mentioning
confidence: 99%
“…For example, in the case of beam elements modelled with FDSFEM, among the interesting scientific reports, one can find e.g., [133], where the comparison of different beam theories is given in terms of the correlation of the accuracy of the results obtained and the theory applied for different wave propagation parameters. Numerical and experimental analysis of wave propagation in beam and rod structures has also been examined in [132]. This research has been extended to include L-joint structure [134].…”
Section: Wave Propagation In 1d Elementsmentioning
confidence: 99%
“…This approach in connection with well-known rod theories from the area of strength of materials has been analysed by a research group from Gdańsk, Poland [130][131][132]. The first two papers cover the problem of comparison of different rod theories and the influence of the proper choice of theory on the obtained results reliability, the third paper comprises the experimental verification of proposed numerical models for modelling of longitudinal waves in structural rod elements.…”
Section: Wave Propagation In 1d Elementsmentioning
confidence: 99%