Hello everybody,
according to 1.2.2 Conventions in Abaqus Analysis User's Guide the the global x-direction is projected to an element so that this direction is then the local 1-direction. If the global x-axis is within 0.1° of being normal to the surface, the local 1-direction is the projection of the global z-axis onto the surface. In my case I've got strange results for some elements. When I assign 0° orientation to the model, the local 1-direction is actually then the global y-direction. Does anybody have a clue why is this happening or is it a bug in Abaqus? I'm using Abaqus 6.13-2 on a windows computer.
Here is my input deck
| *Heading |
| ** Job name: fiberorient_test Model name: fiberorient_test |
| ** Generated by: Abaqus/CAE 6.13-2 |
| *Preprint, echo=NO, model=NO, history=NO, contact=NO |
| ** |
| ** PARTS |
| ** |
| *Part, name=PART-1 |
| *Node |
| 449430, -203.213699, 80.3018723, -40. |
| 449431, -203.200272, 78.5267258, -40. |
| 450053, -203.215607, 80.4494324, -38.023632 |
| 450054, -203.200684, 78.6380615, -38.0335503 |
| 459698, -202.812912, 80.317131, -40.0829964 |
| 459699, -202.801254, 78.5379639, -40.0867805 |
| 512720, -202.81366, 80.4624252, -38.0705757 |
| 512721, -202.800598, 78.6476898, -38.0854149 |
| *Element, type=SC8R |
| 465675, 512721, 512720, 459698, 459699, 450054, 450053, 449430, 449431 |
| ** Region: (CompositeLayup-1-1: Generated From Layup) |
| *Elset, elset=CompositeLayup-1-1 |
| 465675, |
| ** Section: CompositeLayup-1-1 |
| *Shell Section, elset=CompositeLayup-1-1, composite, stack direction=3, layup=CompositeLayup-1 |
| 1., 3, Laminat, 0., Ply-1 |
| *End Part |
| ** |
| ** |
| ** ASSEMBLY |
| ** |
| *Assembly, name=Assembly |
| ** |
| *Instance, name=PART-1-1, part=PART-1 |
| *End Instance |
| ** |
| *Elset, elset=_Surf-1_S2, internal, instance=PART-1-1 |
| 465675, |
| *Surface, type=ELEMENT, name=Surf-1 |
| _Surf-1_S2, S2 |
| *End Assembly |
| ** |
| ** MATERIALS |
| ** |
| *Material, name=Laminat |
| *Elastic, type=LAMINA |
| 100000.,10000., 0.3, 5000., 5000., 4000. |
| ** ---------------------------------------------------------------- |
| ** |
| ** STEP: Step-1 |
| ** |
| *Step, name=Step-1, nlgeom=NO, inc=3000 |
| *Static |
| 0.02, 1., 1e-05, 0.02 |
| ** |
| ** OUTPUT REQUESTS |
| ** |
| *Restart, write, frequency=0 |
| ** |
| ** FIELD OUTPUT: F-Output-2 |
| ** |
| *Output, field |
| *Node Output |
| COORD, |
| ** |
| ** FIELD OUTPUT: F-Output-1 |
| ** |
| *Output, field, variable=PRESELECT |
| ** |
| ** HISTORY OUTPUT: H-Output-1 |
| ** |
| *Output, history, variable=PRESELECT |
| *End Step |
