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Region 1<br />
“Toe Toe”<br />
Region 2<br />
Region 3<br />
Region 3a<br />
Tensile Response Curve<br />
Crimp: low stiffness; change in slope as collegen fibers<br />
straighten; ligaments become more stiff as more fibers<br />
are recruited<br />
Linear Region: slope = stiffness/Elastic Modulus<br />
Elastic: higher stiffness<br />
Less linear behavior; deformation is permanent<br />
(tearing, stretch); Area of Microfailure;<br />
Microfailure<br />
Ultimate Load: where failure occurs (N)<br />
Energy absorbed to failure: area under the curve<br />
(Nmm Nmm)<br />
Region 4 Ligament ruptures<br />
Region 5<br />
Ligament may appear intact; Fibers to slide under low<br />
loads
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