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