000009267 001__ 9267
000009267 005__ 20141204092423.0
000009267 04107 $$aeng
000009267 046__ $$k12/05/2014
000009267 100__ $$aFíla, T.
000009267 24500 $$aComparison of composite material degradation assesment methods using acoustic analysis and laser vibrometry

000009267 24630 $$n18.$$pEngineering Mechanics 2012
000009267 260__ $$bInstitute of Theoretical and Applied Mechanics, AS CR, Prague
000009267 506__ $$arestricted
000009267 520__ $$2eng$$aSummary: Assessment of degradation rate of material can be carried out by many experimental techniques differing in complexity and sophistication. A relatively simple method based on acoustic analysis is described in this contribution. Degradation of material’s properties due to fatigue loading is detectable in decrease of their modulus of elasticity that can be derived from natural frequencies of specimens. These measurements utilize self-designed device capable of specimen excitation and acquisition of its vibration. The recorded signal is then processed by spectral analysis enabling determination of natural frequencies. Usefulness of the above mentioned acoustic method can be seen in the fact that the measured changes of material’s parameters are comparable to those obtained by laser vibrometry, which is by several orders more expensive technique.

000009267 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009267 653__ $$anatural frequency, material degradation, laser vibrometer, acoustic measurement

000009267 7112_ $$aEngineering Mechanics 2012$$cSvratka (CZ)$$d12/05/2014 - 15/05/2014$$gEM2012
000009267 720__ $$aFíla, T.$$iUrushadze, S.$$iKytýř, D.$$iValach, J.$$iŠperl, M.
000009267 8560_ $$ffischerc@itam.cas.cz
000009267 8564_ $$s547453$$uhttps://invenio.itam.cas.cz/record/9267/files/241_Fila_T-FT.pdf$$yOriginal version of the author's contribution as presented on CD, paper (No. 241).
000009267 962__ $$r8924
000009267 980__ $$aPAPER