1. Prof. Anthony Petrella Abaqus Boundary Conditions for Simulation of TKR Performance MEGN 536 – Computational Biomechanics

2. Abaqus Boundary Conditions  Defined relative to global ref frame shown in Abaqus window  Degrees of freedom for INPUT BC’s are indicated by numbers… 1 = XTrans, 2 = YTrans, 3 = ZTrans, 4 = XRot, 5 = YRot, 6 = Zrot  NOTE: for OUTPUTS Abaqus uses a different naming convention: U1, U2, U3 for displacements and UR1, UR2, UR3 for rotations ** ** BOUNDARY CONDITIONS ** *Boundary, op=new, amp=flex femur.RP, 1, 1, femur.RP, 3, 3, femur.RP, 4, 4, 1.0 femur.RP, 5, 5, tibia.RP, 1, 2, tibia.RP, 4, 4, tibia.RP, 6, 6, spring_ground, 1, 3,

3. Abaqus Boundary Conditions  Defined relative to global ref frame shown in Abaqus window  *Boundary can operate on a series of DOF…syntax is… node_num/name, start DOF, end DOF, scale factor ** ** BOUNDARY CONDITIONS ** *Boundary, op=new, amp=flex femur.RP, 1, 1, femur.RP, 3, 3, femur.RP, 4, 4, 1.0 femur.RP, 5, 5, tibia.RP, 1, 2, tibia.RP, 4, 4, tibia.RP, 6, 6, spring_ground, 1, 3,

4. Abaqus Boundary Conditions  Defined relative to global ref frame shown in Abaqus window  Amplitude name refers to a set of (time, amplitude) data pairs that define a force or displacement curve, these data are contained in the bc_data.inc file provided ** ** BOUNDARY CONDITIONS ** *Boundary, op=new, amp=flex femur.RP, 1, 1, femur.RP, 3, 3, femur.RP, 4, 4, 1.0 femur.RP, 5, 5, tibia.RP, 1, 2, tibia.RP, 4, 4, tibia.RP, 6, 6, spring_ground, 1, 3,

5. Abaqus Boundary Conditions  Recall BC’s from last worksheet…  Depending on how you draw your knee implant in SW, you may need to change the axes on which specific BC’s are defined ** ** BOUNDARY CONDITIONS ** *Boundary, op=new, amp=flex femur.RP, 1, 1, femur.RP, 3, 3, femur.RP, 4, 4, 1.0 femur.RP, 5, 5, tibia.RP, 1, 2, tibia.RP, 4, 4, tibia.RP, 6, 6, spring_ground, 1, 3,