Propagation of stress waves in viscoelastic media

Theocaris, PS; Papadopoulou, N

dc.contributor.author	Theocaris, PS	en
dc.contributor.author	Papadopoulou, N	en
dc.date.accessioned	2014-03-01T01:05:42Z
dc.date.available	2014-03-01T01:05:42Z
dc.date.issued	1978	en
dc.identifier.issn	00323861	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/8942
dc.subject.other	ELASTIC WAVES	en
dc.subject.other	MATHEMATICAL MODELS	en
dc.subject.other	MECHANICAL WAVES - Measurements	en
dc.subject.other	STRESSES	en
dc.subject.other	WAVEFORM ANALYSIS	en
dc.subject.other	STRESS WAVE PROPAGATION	en
dc.subject.other	VISCOELASTIC MEDIA	en
dc.subject.other	POLYMERS	en
dc.title	Propagation of stress waves in viscoelastic media	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/0032-3861(78)90042-3	en
heal.identifier.secondary	http://dx.doi.org/10.1016/0032-3861(78)90042-3	en
heal.publicationDate	1978	en
heal.abstract	A new method for the determination of the characteristic parameters of the stress wave propagation, such as attenuation coefficient, wave velocity, Young's modulus and the viscosity coefficient, at various frequencies in viscoelastic rods is presented. The method is based on the propagation of an arbitrary pulse in such a rod and the determination of the characteristic wave propagation parameters of each term of the Fourier series expansion of the propagating pulse. Since each term corresponds to a definite frequency, the characteristic properties of the wave propagation over a wide frequency range can be determined, by means of one test only. The analysis is based on the assumption that the viscoelastic material obeys a Kelvin-Voigt model. The stress pulse was created by means of a steel ball, projected by an air-gun, and was recorded by a transient recorder with digital memory. Two typical viscoelastic materials were tested, namely a poly(methyl methacrylate) (plexiglas) and a polycarbonate of bisphenol A (lexan). The characteristic wave propagation parameters were determined in a frequency range between 3 and 35 kHz and the results obtained agreed satisfactorily with corresponding results of previous investigators. © 1978.	en
heal.journalName	Polymer	en
dc.identifier.doi	10.1016/0032-3861(78)90042-3	en
dc.identifier.volume	19	en
dc.identifier.issue	2	en
dc.identifier.spage	215	en
dc.identifier.epage	219	en