Effective width — where it appears
Also named here as section classification — the same set of essays touches all of them, so they are one junction rather than several.
The plate that ripples, and the width that is left
A wide thin plate in compression buckles at a stress that has nothing to do with the strength of the material. It then goes on carrying load — the middle drops out, and the edges work harder.
The section that cannot reach its own strength
A section classification looks like a table of arbitrary numbers. Set a plate's buckling stress equal to the yield stress and the numbers fall out of a formula written three phases ago — larger than the quoted ones by a constant factor, at every grade.
Named alongside it
The objects these essays reach for when they reach for this one.
Section classificationDuctilityImperfectionLocal bucklingMoment curvaturePlate bucklingPlate slendernessPost bucklingResidual stressRotation capacitySlendernessWidth to thickness