000022349 001__ 22349
000022349 005__ 20170622150009.0
000022349 04107 $$aeng
000022349 046__ $$k2015-05-25
000022349 100__ $$aAbramian, Andrei
000022349 24500 $$aDESTRUCTION OF THIN FILMS WITH A DAMAGED SUBSTRATE AS A RESULT OF WAVES LOCALIZATION CAUSED BY PERIODIC IMPACT

000022349 24630 $$n5.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000022349 260__ $$bNational Technical University of Athens, 2015
000022349 506__ $$arestricted
000022349 520__ $$2eng$$aThe present paper is devoted to an issue of possible localization of waves propagating within a structure that consists of a film connected to a backing material through a substrate. The substrate is initially damaged.In the first approximation the film model in the present paper is assumed to be a string on an elastic foundation with a coefficient depending on the substrate damage degree. The elastic foundation imitates the substrate and backing material effects on the film.Initiation of a string delamination resulted from the structure damaged at localized oscillations caused by a periodic impact load has been considered.At loading the initial damage of the substrate is changing in time and space according to the proposed law of the damage growth.It has been shown that at impact the cause of the string substrate material damage increase can be localized oscillation modes. The localized mode existence depends on relation between the initial substrate rigidity and the main material rigidity.There is also possible a passage through a sequence of resonances under the action of a periodic impact force.

000022349 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000022349 653__ $$athin film,damage substrate,wave localization,string

000022349 7112_ $$aCOMPDYN 2015 - 5th International Thematic Conference$$cCrete (GR)$$d2015-05-25 / 2015-05-27$$gCOMPDYN2015
000022349 720__ $$aAbramian, Andrei$$iVakulenko, Sergey
000022349 8560_ $$ffischerc@itam.cas.cz
000022349 8564_ $$s212082$$uhttps://invenio.itam.cas.cz/record/22349/files/C560.pdf$$yOriginal version of the author's contribution as presented on CD, section: 
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000022349 962__ $$r22030
000022349 980__ $$aPAPER