**

** 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

**