--- a
+++ b/Laxity Testing/props_cart.inp
@@ -0,0 +1,51 @@
+**
+** Cartilage rigid body reference nodes
+*node
+   1100010,  -0.864186720343,  11.338958125312,  2.8061419828951
+   1200010,  -0.122733571349,  -0.060786233922,  0.0061992288766
+   1200011,  -0.122733571349,  -0.060786233922,  0.0061992288766
+**
+*MATERIAL, NAME=CARTILAGE_MATERIAL
+*DENSITY
+     1.81E-8,
+*ELASTIC, TYPE=ISO
+      20,        0.45
+*DAMPING, ALPHA=200.
+**
+*SECTION CONTROLS, NAME=CARTILAGE_MAT_CONTROL, HOURGLASS=STIFFNESS
+20.0
+**
+**
+**
+*SOLID SECTION, ELSET=CART-FEMUR, MATERIAL=CARTILAGE_MATERIAL, CONTROLS=CARTILAGE_MAT_CONTROL
+1.,
+*SOLID SECTION, ELSET=CART-TIBIA-LAT, MATERIAL=CARTILAGE_MATERIAL, CONTROLS=CARTILAGE_MAT_CONTROL
+1.,
+*SOLID SECTION, ELSET=CART-TIBIA-MED, MATERIAL=CARTILAGE_MATERIAL, CONTROLS=CARTILAGE_MAT_CONTROL
+1.,
+**
+**
+*SURFACE, NAME=SURF-CART-FEMUR
+CART-FEMUR
+*SURFACE, NAME=SURF-CART-TIBIA-LAT
+CART-TIBIA-LAT
+*SURFACE, NAME=SURF-CART-TIBIA-MED
+CART-TIBIA-MED
+**
+**
+**   
+**
+*RIGID BODY, ELSET=CART-FEMUR, REF NODE=1100010
+*RIGID BODY, ELSET=CART-TIBIA-LAT, REF NODE=1200010
+*RIGID BODY, ELSET=CART-TIBIA-MED, REF NODE=1200011
+**
+**
+*******************
+** Boundary conditions to connect bones to cartilage
+**
+*mpc
+beam, 1100010, 1100000
+beam, 1200010, 900000
+beam, 1200011, 900000
+beam, 200010, 1200000
+**
\ No newline at end of file