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Understanding buckling factors from ANSYS

Understanding buckling factors from ANSYS

Understanding buckling factors from ANSYS

(OP)
Hello everyone,

Please see the attached list of buckling factors. Glass means monolithic hypar and other columns are segmented (segment shape: square, diamond, etc) hypars with adhesive joints.

Hypar is expected to be highly stable in buckling as one of the principal directions carry tensile forces. Also, I read that the first positive critical buckling factor should be considered and the negative ones can be igmored. As you can see, the first positive buckling factor is very low. Can anyone explain why this is happening?

Best regards,
Sushant
Uni Stuttgart

RE: Understanding buckling factors from ANSYS

This looks like applied load ratio to me. If so, the negative values represent reversals of the applied load which would explain their large values. These systems derive their stiffness from their anticlastic geometry. If your structure buckles at an unexpectedly low load, perhaps the geometry or the model of the geometry require refinement.

The greatest trick that bond stress ever pulled was convincing the world it didn't exist.

RE: Understanding buckling factors from ANSYS

(OP)
It is buckling at such low values because the adhesive joints between glass (E=70000 MPa) panes have a very low stiffness (E = 10 MPa). I want to compare the four patterns (square, diamond,...etc) and say in my report which one gives the highest critical buckling factor. So should I compare the -ve factors or the +ve ones?

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