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Buckling Optimization

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Buckling Optimization

Mechanica Users,

What is the method for optimizing a plate with a reinforced hole that is
shear buckling dominant?
I am using 2D elements. The optimization is on minimum weight with the
hole reinforcement diameter and web thickness as variables.
I set a rule that I want the BLF > x, but the solver gets confused
between steps as to whether the BLF is positive or negative since it is
pure shear.

Chuck Kaiser
Boeing-St. Louis