Specifications

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the values of L0, eps1, and F1. You can similarly increase the slopes by increasing a1:
Unlike normal fourth order polynomials, these curves will continue predictably with no oscillation for as long
as desired after (eps1,F1). The reason for this behavior is the default setting of the parameter
LinRegionOnOff = On
which causes the curve to continue a linear behavior after (eps1,F1). You can, however, obtain the clean
fourth order polynomial behavior is you like by switching this setting off:
AnyLigamentModelPol LigModel = {
L0 = 1.30; // Slack length
eps1 = 0.2; // Strain where F1 is valid
F1 = 1000; // Force in the ligament at strain eps1
a0 = 0.5;
a1 = 1.0;
LinRegionOnOff = Off;
};