Creep-Fatigue Terminology
Creep-Fatigue Terminology
(OP)
Is 'thermomechanical fatigue' just another term for 'thermal fatigue' or 'creep-fatigue'? There appears to be some inconsistency in the literature.
I would like someone to clear this up (so I don't appear unfashionable on my F/A report). Thanks!
I would like someone to clear this up (so I don't appear unfashionable on my F/A report). Thanks!





RE: Creep-Fatigue Terminology
RE: Creep-Fatigue Terminology
Thermo mechanical fatigue is the combination of mechanical and thermal stress effects on fatigue behavior.
Creep fatigue is the synergistic effects of creep and fatigue on crack propagation.
RE: Creep-Fatigue Terminology
RE: Creep-Fatigue Terminology
RE: Creep-Fatigue Terminology
RE: Creep-Fatigue Terminology
Fatigue due to thermally-induced stresses which produces a defect which looks identical to other fatigue cracks - this is what mechanical engineers seem to understand as thermal fatigue.
or
A mechanism that produces multiple cracks (often seen with corrosion in the cracks which produces the broad defects shown below), but again, due to thermal stresses. This is (also) what materials engineers denote thermal fatigue. The example below was the inside bore of a condensate line into a steam line, the thermal fluctuations due to the varying flow into the steam line produced the cracking shown below (the white colour is the MPI background paint so the defects can be seen easily).
So you are correct!
Adam Potter MEng CEng MIMechE
www.ax-ea.co.uk
RE: Creep-Fatigue Terminology
RE: Creep-Fatigue Terminology