Elastic limit — where it appears
Named by 2 essays across 2 fields — each of them below, with the objects they name alongside it.
Bending is a pair of forces, pushing and pulling
A bending moment is not a mysterious twisting. It is a push near the top of a section and a pull near the bottom, separated by a lever arm — a couple, made out of stress.
The column that had yielded before it was loaded
A real column sits below both of the two straight answers over the whole middle of the slenderness range, and the usual explanation — that it was not straight — is only half of it. The other half is that the flange tips had already yielded when it left the rolling mill.
Named alongside it
The objects these essays reach for when they reach for this one.
BucklingCentroidColumn curveCritical loadImperfectionLever armNeutral axisPlane sectionsPlastic momentResidual stressSecond moment of areaSection modulus