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contributor authorShankar Sundararaman
contributor authorDouglas E. Adams
date accessioned2017-05-09T00:31:01Z
date available2017-05-09T00:31:01Z
date copyrightAugust, 2008
date issued2008
identifier issn1048-9002
identifier otherJVACEK-28895#041009_1.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/139593
description abstractIn this paper, a numerical simulation technique based on the local interaction simulation approach (LISA)/sharp interface model (SIM) is used to study the propagation of Lamb waves in aluminum and orthotropic plates and wave interactions with damage. The LISA/SIM model allows for accurate and fast simulations of sharp changes in material properties across interfaces associated with damage or specimen boundaries. Damage in the form of holes and changes in density and/or stiffnesses are studied for three different plates. These local changes in density and stiffness have dimensions not exceeding the wave length of the interrogating wave form. Wave scatter from these damage sites is shown at different time instants and at specific spatial locations. Multiple site damage cases are studied for all the plate structures. The different scatter patterns associated with intersecting and nonintersecting surface cracks are also studied. Results obtained from a combination of single site damage cases are compared with the composite multiple site damage case to study the usability of commonly applied algorithms for identifying damage. The benefits of observing multiple directions of the displacement field are demonstrated. It is shown that the out-of-plane measurements give a clearer indication of damage sites than the in-plane measurements.
publisherThe American Society of Mechanical Engineers (ASME)
titleModeling Guided Waves for Damage Identification in Isotropic and Orthotropic Plates Using a Local Interaction Simulation Approach
typeJournal Paper
journal volume130
journal issue4
journal titleJournal of Vibration and Acoustics
identifier doi10.1115/1.2890389
journal fristpage41009
identifier eissn1528-8927
keywordsDimensions
keywordsWaves
keywordsDisplacement
keywordsActuators
keywordsMaterials properties
keywordsDensity
keywordsComputer simulation
keywordsPlates (structures)
keywordsSignals
keywordsStiffness AND Surface cracks
treeJournal of Vibration and Acoustics:;2008:;volume( 130 ):;issue: 004
contenttypeFulltext


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