Cracking — where it appears
Named by 2 essays across 2 fields — each of them below, with the objects they name alongside it.
The strain that was imposed, and the stress that leaked away
Multiply a restrained shrinkage strain by the modulus and the answer is three times the tensile strength — which predicts that every restrained concrete member ever cast has cracked. Most have not, and the reason is that the material creeps while it is being stressed.
The load put on backwards
Every other structure in this collection waits for its load and then resists it. A prestressed one is given a load first — chosen, permanent, and pointing the wrong way — so that when the real one arrives the two nearly cancel and the material never has to do the thing it is bad at.
Named alongside it
The objects these essays reach for when they reach for this one.
PrestressSuperpositionAgeing coefficientBending stressCreepImposed deformationKernLoad balancingPrestress lossesRelaxationRestraintShrinkage