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. Author manuscript; available in PMC: 2017 Sep 1.
Published in final edited form as: J Mech Behav Biomed Mater. 2016 Apr 23;62:24–32. doi: 10.1016/j.jmbbm.2016.04.025

Figure 2.

Figure 2

The simplified distribution of mechanical properties considered for tendon, bone, and the graded attachment site. Bone was modeled as isotropic; tendon and the attachment site were modeled as cylindrically orthotropic, and mechanical properties were required to be continuous. (a) Within the graded attachment site, the anisotropy ratio was modeled as linear. (b) This required a cubic interpolation of the Poisson ratio νrθ(r); this relationship lay below the upper bound on νrθ(r) for an anisotropy ratio less than 10. (c) The tangential modulus Eθ(r) was modeled as varying linearly. (d) The radial modulus was thus required to follow a parabolic interpolation. (e) The resulting interpolation of νθr(r) was non-monotonic but continuous, smooth, and positive.