On the relationship between moment and curvature for an ovine artery
To find a relationship between moment versus curvature in a traction-free ovine
artery, a pure moment was applied to a radially cut ovine artery (length 50.23 mm).
The curvature of the segment opposite the cut was calculated and used to calculate
the pre-stresses using a Fung type model. The pre-stresses were then used to calculate
the moment. The moment applied during the experiment was calculated by
recording the twist applied and the stiffness of the wire applying the moment. The
artery was sutured symmetrically with a custom jig, and then sutured to two blocks,
one fixed and one subject to the pure moment. The axial strain was assumed unity.
The Fung model yielded a linear moment versus curvature relationship, as well as
the moment versus curvature relationship for the experiment. Despite both small
and large stretches, the strains felt by the artery were not influential enough to
display a non-linear correlation for moment vs curvature.
Advisor:Criscione, John C.; Rajagopal, K.R.; Hyman, William A
School:Texas A&M University
School Location:USA - Texas
Source Type:Master's Thesis
Keywords:pre stress moment curvature thoracic artery
Date of Publication:08/01/2006