Search the Community
Showing results for tags 'pbush'.
Found 2 results
I am trying to squeeze a femur model with two sets of stiff springs top and bottom, and allow it to rotate with the other (spring BCs come from a research paper). Instead, the model bends where the mesh meets the springs that should remain mostly straight. However, I have tried adjusting all DOF stiffnesses in the PBUSH card without luck. All springs have been assigned to the local coordinate system (shown in right on photos) using CBUSH card. It seems to me I need to stiffen K2 or K6 (y-tension, z-moment), but neither of these solves the issue. Attached graphs show "TY" stresses. Femur_Model_6_26.fem
I'm modeling a representative volume element that it's basicaly made by a cylinder inserted into a cube. I need to make a spring contact between this two parts, changing the spring stiffness i want to analyse the perfect and the imperfect contact. Anybody has a tip to build this model with spring elements (CBUSH) only in the common nodes between the cylinder and the rest of the cube? Those spring elements need to be at a cylindric system. I have something like this: