--- a
+++ b/Laxity Testing/props_pfl_slipring.inp
@@ -0,0 +1,79 @@
+**
+*CONNECTOR SECTION, ELSET=PFL_pull, BEHAVIOR=pfl_behavior
+AXIAL,
+**
+*CONNECTOR SECTION, ELSET=PFL_slipring, BEHAVIOR=pfl_slipring_behavior
+slipring,
+
+1.05e-9, ,
+**
+**
+**
+*PARAMETER
+PFL_num_sp_par = 3.0
+PFL_num_sp_ser = 1.0
+** PFL_L0=free length of the PFL
+PFL_L0 = PFL_L / PFL_EREF
+** PFL_K1=calculated coefficient for non-linear stiffness range
+PFL_K1 = PFL_K2/4/PFL_L0/PFL_ET
+** Calculate reference relative displacements
+PFL_DF=PFL_L0-PFL_L-50
+PFL_D0=(PFL_L0-PFL_L)/PFL_num_sp_ser
+PFL_D1=(PFL_L0*(1+PFL_ET/2)-PFL_L)/PFL_num_sp_ser
+PFL_D2=(PFL_L0*(1+PFL_ET)-PFL_L)/PFL_num_sp_ser
+PFL_D3=(PFL_L0*(1+PFL_ET*3/2)-PFL_L)/PFL_num_sp_ser
+PFL_D4=(PFL_L0*(1+2*PFL_ET)-PFL_L)/PFL_num_sp_ser
+PFL_D5=(PFL_L0*(1+4*PFL_ET)-PFL_L)/PFL_num_sp_ser
+PFL_D6=(PFL_L0*(1+10*PFL_ET)-PFL_L)/PFL_num_sp_ser
+**
+PFL_DD0=(PFL_L0-PFL_L)
+PFL_DD1=(PFL_L0*(1+PFL_ET/2)-PFL_L)
+PFL_DD2=(PFL_L0*(1+PFL_ET)-PFL_L)
+PFL_DD3=(PFL_L0*(1+PFL_ET*3/2)-PFL_L)
+PFL_DD4=(PFL_L0*(1+2*PFL_ET)-PFL_L)
+PFL_DD5=(PFL_L0*(1+4*PFL_ET)-PFL_L)
+PFL_DD6=(PFL_L0*(1+10*PFL_ET)-PFL_L)
+** Calculate reference ligament forces
+PFL_FF=0 
+PFL_F0=0 
+PFL_F1=(PFL_K1*(PFL_L+PFL_DD1-PFL_L0)**2)/PFL_num_sp_par 
+PFL_F2=(PFL_K1*(PFL_L+PFL_DD2-PFL_L0)**2)/PFL_num_sp_par 
+PFL_F3=(PFL_K1*(PFL_L+PFL_DD3-PFL_L0)**2)/PFL_num_sp_par 
+PFL_F4=(PFL_K1*(PFL_L+PFL_DD4-PFL_L0)**2)/PFL_num_sp_par 
+PFL_F5=(PFL_K2*(PFL_L+PFL_DD5-(1+PFL_ET)*PFL_L0))/PFL_num_sp_par 
+PFL_F6=(PFL_K2*(PFL_L+PFL_DD6-(1+PFL_ET)*PFL_L0))/PFL_num_sp_par 
+**
+**
+**
+**
+*CONNECTOR BEHAVIOR, NAME=pfl_behavior
+*CONNECTOR ELASTICITY, COMPONENT=1, NONLINEAR
+<PFL_FF> , <PFL_DF>
+<PFL_F0> , <PFL_D0>
+<PFL_F1> , <PFL_D1>
+<PFL_F2> , <PFL_D2>
+<PFL_F3> , <PFL_D3>
+<PFL_F4> , <PFL_D4>
+<PFL_F5> , <PFL_D5>
+<PFL_F6> , <PFL_D6>
+*CONNECTOR DAMPING, COMPONENT=1
+0.05
+**
+*CONNECTOR BEHAVIOR, NAME=pfl_slipring_behavior
+*CONNECTOR ELASTICITY, COMPONENT=1, NONLINEAR
+-10000000, -1.0
+-1000000, -0.1
+-100000, -0.01
+0.0,0.0
+100000, 0.01
+1000000, 0.1
+10000000, 1.0
+**
+**
+**
+**
+*MASS, ELSET=lig_pfl_mass
+1E-6
+*ROTARY INERTIA, ELSET=lig_pfl_rot
+0.001,0.001,0.001
+**
\ No newline at end of file