Tension buckling in ABAQUS
Tension buckling in ABAQUS
(OP)
Hello,
I am trying to obtain the tension buckling modes in an edge-cracked plate using ABAQUS. If I run a regular stress analysis there are certainly compressive stresses in the direction perpendicular to the applied tensile in the region adjacent to the edge crack. However when I run a linear perturbation step, ABAQUS outputs the compression buckling modes (negative eigenvalues). Is there any step I'm missing?
Any help would be much appreciated.
I am trying to obtain the tension buckling modes in an edge-cracked plate using ABAQUS. If I run a regular stress analysis there are certainly compressive stresses in the direction perpendicular to the applied tensile in the region adjacent to the edge crack. However when I run a linear perturbation step, ABAQUS outputs the compression buckling modes (negative eigenvalues). Is there any step I'm missing?
Any help would be much appreciated.





RE: Tension buckling in ABAQUS
are you looking at the far (uncracked) edge of the plate ? looking at the compression side of the bending in the plate ??
it'd be an odd geometry that'd have a stable crack and compression buckling (of the far edge) ...
RE: Tension buckling in ABAQUS
i'm looking at a tension flange stem in an I-shaped plate girder, where fatigue cracks can form at the fillet weld and propagate towards the outer tip of the flange stem. The edge with the crack is rotationally restrained and can only translate in the direction parallel to the tensile load. The compressive stresses appear in the region adjacent to the crack. I've seen it done in ABAQUS before but I can't figure out how to obtain the positive eigenvalues.
RE: Tension buckling in ABAQUS
not sure what you mean by "the crak is rotationally restained" ? or why you'd do that.
i assume you're modelling the crack as a duplication in the mesh ?
RE: Tension buckling in ABAQUS
ive been modelling the crack by assigning a seam to a line partition. i'm assuming the crack is already through-thickness
RE: Tension buckling in ABAQUS
but you say (i think) you've got a crack in a fillet weld, growing along the legth of the plate ?
RE: Tension buckling in ABAQUS
RE: Tension buckling in ABAQUS
Ted
RE: Tension buckling in ABAQUS