Wave propagation in joined thin dissimilar elastic tubes containing viscous fluid

Hart V.G. and Shi J. (1994) Wave propagation in joined thin dissimilar elastic tubes containing viscous fluid. International Journal of Engineering Science, 32 4: 617-634. doi:10.1016/0020-7225(94)90022-1


Author Hart V.G.
Shi J.
Title Wave propagation in joined thin dissimilar elastic tubes containing viscous fluid
Journal name International Journal of Engineering Science   Check publisher's open access policy
ISSN 0020-7225
Publication date 1994-01-01
Sub-type Article (original research)
DOI 10.1016/0020-7225(94)90022-1
Open Access Status Not yet assessed
Volume 32
Issue 4
Start page 617
End page 634
Total pages 18
Subject 2200 Engineering
Abstract The aim of the present paper is to investigate theoretically the reflection and transmission of the deformations and stress waves in thin dissimilar eleastic tubes joined longitudinally and containing pulsatile fluid flow. With the long wavelength approximation, there exist two waves (with different velocities) corresponding to a single frequency. Superimposition of the two waves for each tube produces two reflected and two transmitted waves each with constant amplitudes which are determined from four dominant conditions of the six conditions at the joint cross-section. Rate of energy transfer in the system is also formulated. Although the application of the theory is two-fold: to engineering structures where a segment of high strength pipe may be inserted in a weaker tube for reasons of corrosion resistance for example, and the arterial system when an artificial implant is interposed or a contraction or stenose forms, the numerical examples are given for the latter. Effects of frequency on the reflection and transmission are illustrated for blood pulse in a natural artery joined with an artificial graft. Our numerical results correspond here to zero initial stresses. It is found that there is no discontinuity in the circumferential tension at a joint. The theoretical approach is justified since it would be extremely difficult to find the stresses at the joint experimentally.
Q-Index Code C1
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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