Concept
Moment arm — where it appears
2 essays name this object, across one field. What follows is each of them, and the objects they name alongside it.
The bolt that carries more than its share
Six bolts, one hundred kilonewtons, and a worst bolt carrying fifty. The load is shared equally and the torque is not, and the second one is invisible on any drawing where the connection is a point.
The force the bolt never saw applied
Pull a tee stub with a hundred kilonewtons and its bolt carries a hundred and fifty. The extra comes from the flange bending and pressing its own edge against the thing it is bolted to, and no free body of the connection as a point contains it.
Named alongside it
The objects these essays reach for when they reach for this one.
ConnectionBolt groupBolt tensionCollapse mechanismEccentricityFlangeInstantaneous centreLever armPlastic hingePlastic redistributionPolar second momentPrying