Abstract
The post-critical analysis performed for a structure optimized only for buckling constraints shows in many cases that the behaviour of the designed element after buckling is unstable. That should be considered as a drawback of the standard design since the applicability of such an unstable optimal structure may be questionable. Recently the new concept of structural optimization against instability has been proposed. The post-buckling analysis is included directly in the optimization problem and the modified design is formulated. As a result, the modified optimal structure with stable behaviour after buckling is created. Many modified design problems for structures exposed to elastic instability have been already formulated and solved. This paper gives some proposals of extending that approach for the design of elastic-plastic structures.
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