Finite Elasticity Modeling of the Biaxial and Uniaxial Properties of Compliant Vascular Grafts

[+] Author and Article Information
S. F. C. Stewart, D. J. Lyman

Department of Materials Science and Engineering, University of Utah, Salt Lake City, UT 84112

J Biomech Eng 110(4), 344-348 (Nov 01, 1988) (5 pages) doi:10.1115/1.3108451 History: Received November 02, 1987; Revised September 12, 1988; Online June 12, 2009


Compliant vascular grafts were modeled by finite elasticity theory. A linear, biaxial model satisfactorily described the stress-strain behavior in inflation tests, where the sample length was fixed longitudinally and inflated. The model was then used to predict the behavior in a longitudinal test (where the longitudinal stretch was varied while keeping the pressure zero), and in a uniaxial test of a circumferential strip. The model satisfactorily predicted the longitudinal Young’s modulus measured in the longitudinal test. The model was less successful in predicting the circumferential Young’s modulus measured in the uniaxial test, possibly because the state of stress was not purely uniaxial.

Copyright © 1988 by ASME
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