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Fluid–structure interaction in water-filled thin pipes of anisotropic composite materials

You, Jeong Ho and Inaba, K. (2013) Fluid–structure interaction in water-filled thin pipes of anisotropic composite materials. Journal of Fluids and Structures, 36 . pp. 162-173. ISSN 0889-9746. doi:10.1016/j.jfluidstructs.2012.08.010.

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The effects of elastic anisotropy in piping materials on fluid–structure interaction are studied for water-filled carbon-fiber reinforced thin plastic pipes. When an impact is introduced to water in a pipe, there are two waves traveling at different speeds. A primary wave corresponding to a breathing mode of pipe travels slowly and a precursor wave corresponding to a longitudinal mode of pipe travels fast. An anisotropic stress–strain relationship of piping materials has been taken into account to describe the propagation of primary and precursor waves in the carbon-fiber reinforced thin plastic pipes. The wave speeds and strains in the axial and hoop directions are calculated as a function of carbon-fiber winding angles and compared with the experimental data. As the winding angle increases, the primary wave speed increases due to the increased stiffness in the hoop direction, while the precursor wave speed decreases. The magnitudes of precursor waves are much smaller than those of primary waves so that the effect of precursor waves on the deformation of pipe is not significant. The primary wave generates the hoop strain accompanying the opposite-signed axial strain through the coupling compliance of pipe. The magnitude of hoop strain induced by the primary waves decreases with increasing the winding angle due to the increased hoop stiffness of pipe. The magnitude of axial strain is small at low and high winding angles where the coupling compliance is small.

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Additional Information:© 2012 Elsevier Ltd. Received 20 October 2011; Accepted 8 August 2012; Available online 3 November 2012. The authors thankfully acknowledge the valuable comments and advice from K. Bhattacharya, J. Shepherd, and G. Ravichandran at California Institute of Technology. The theoretical and experimental studies were carried out at California Institute of Technology and sponsored by the Office of Naval Research, DOD MURI on Mechanics and Mechanisms of Impulse Loading, Damage and Failure of Marine Structures and Materials (ONR Grant no. N00014-06-1-0730), program manager Dr. Y.D.S. Rajapakse.
Funding AgencyGrant Number
Office of Naval Research (ONR)N00014-06-1-0730
Subject Keywords:Fluid–structure interaction; Anisotropic piping materials; Carbon-fiber reinforced thin plastic tube
Record Number:CaltechAUTHORS:20130228-142748809
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Official Citation:Jeong Ho You, K. Inaba, Fluid–structure interaction in water-filled thin pipes of anisotropic composite materials, Journal of Fluids and Structures, Volume 36, January 2013, Pages 162-173, ISSN 0889-9746, 10.1016/j.jfluidstructs.2012.08.010.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:37212
Deposited By: Tony Diaz
Deposited On:01 Mar 2013 00:06
Last Modified:09 Nov 2021 23:27

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