Theory 103/Infrastructure lifecycle/Onset phase
Ageing Begins on a Stress Ratio
The claim
An asset begins to degrade when the ratio of service stress to design resistance exceeds a threshold, so identical assets age differently on different routes.
01Mechanism
Damage accumulates only above a stress threshold in many materials.
02Prediction
Degradation onset should track the ratio.
03Refutation
Onset tracking calendar age would remove stress.