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TECHNICAL PAPERS

A Biphasic, Anisotropic Model of the Aortic Wall

[+] Author and Article Information
Mark Johnson

Northwestern University, Evanston, IL

John M. Tarbell

Pennsylvania State University, University Park, PA 16802

J Biomech Eng 123(1), 52-57 (Aug 29, 2000) (6 pages) doi:10.1115/1.1339817 History: Received July 02, 1999; Revised August 29, 2000
Copyright © 2001 by ASME
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References

Figures

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Biphasic and single-phase 12 model predictions of aortic wall volume (normalized to unpressurized volume) as a function of perfusion pressure in a cylindrical geometry for parameter values of E=460 kPa,E=20 kPa,ν=0.3,M=6.0, and 0<ν<0.05
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Biphasic and single-phase 12 model predictions of aortic radius as a function of perfusion pressure for parameter values of E=460 kPa,E=20 kPa,ν=0.3,M=6.0 and ν=0.038 (biphasic) or ν=0.0 (single-phase)
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Comparison of biphasic (solid line) to single-phase model (dashed line) 12 for the tangential (σt) and radial (σr) stress distribution in the aortic wall at a perfusion pressure of 70 mmHg for parameter values of E=460 kPa,E=20 kPa,ν=0.3,ν=0.038 and M=6.0.
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Comparison of biphasic (solid line) to single-phase model (dashed line) 12 for the tangential (εt) and radial strain (εr) distribution in the aortic wall at a perfusion pressure of 70 mmHg for parameter values of E=460 kPa,E=20 kPa,ν=0.3,ν=0.038 and M=6.0
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Data (symbols) from rabbit aorta Baldwin et al. 6 for vessel radius as a function of perfusion pressure. The solid line is from the nonlinear biphasic model as described in the text
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Modulus in the plane of symmetry (E) of the rabbit aorta as a function of tangential strain as determined by the biphasic model in combination with the data from Baldwin et al. 6
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Modulus in the plane of symmetry (E) of the rabbit aorta as a function of perfusion pressure as determined by the biphasic model in combination with the data from Baldwin et al. 6
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Thickness of the rabbit aortic wall as predicted by the nonlinear, biphasic model (solid line) for the parameters given in the text. Data shown are from Baldwin et al. 6
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Hydraulic conductivity of the rabbit aortic wall as predicted by the nonlinear, biphasic model (solid line) for the parameters given in the text. Data shown are from Baldwin et al. 19

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