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October 15, 2015, 19:04 |
beamEndLoad: Possible bug in Stress analysis
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#1 |
New Member
Jerome Berryhill
Join Date: Oct 2015
Posts: 16
Rep Power: 10 |
I made a modification of the beamEndLoad case (bEL). The original code has a 30X1X1 beam, with one end fixed, and a shear traction applied in the Y direction applied to the opposite end. The beam is represented as a single block with (6,2,1) cell structure. I modified this, so that the last sixth of the beam is a separate block, and put a face on the -Y side of that block, with a traction in the +Y direction. That is, I replaced the shear on the end with a normal force from the bottom, in the same direction. I would expect the results to be nearly identical, but in fact they are very different.
Is this a bug? Or am I doing something wrong? from blockMesh; vertices ( (0 0 0) // 0 (25 0 0) // 1 (25 1 0) // 2 (0 1 0) // 3 (0 0 1) // 4 (25 0 1) // 5 (25 1 1) // 6 (0 1 1) // 7 (30 0 0) // 8 (30 1 0) // 9 (30 0 1) // 10 (30 1 1) // 11 ); blocks ( hex (0 1 2 3 4 5 6 7) (5 2 1) simpleGrading (1.0 1.0 1.0) // left part of beam hex (1 8 9 2 5 10 11 6) (1 2 1) simpleGrading (1.0 1.0 1.0) ); edges ( ); boundary ( pressureFace { type patch; faces ( (1 2 9 8) ); } fixedEnd { type patch; faces ( (0 4 7 3) ); } ); from 0/D dimensions [ 0 1 0 0 0 0 0 ]; internalField uniform ( 0 0 0 ); boundaryField { pressureFace { type tractionDisplacement; traction uniform (0 10000 0); pressure uniform 0; value uniform (0 0 0); } fixedEnd { type fixedValue; value uniform (0 0 0); } defaultFaces { type empty; } } |
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October 15, 2015, 21:11 |
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#2 |
New Member
Jerome Berryhill
Join Date: Oct 2015
Posts: 16
Rep Power: 10 |
Ooops. Never mind. I had x1, x2, x3 confused with x, y, z.
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