Numerical investigations of crack initiation in impulse steam turbine rotors subject to thermo-mechanical fatigue

• Published in: Applied thermal engineering Vol. 138; pp. 761 - 773
• Main Author: Banaszkiewicz, Mariusz
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 25.06.2018; Elsevier BV
• Subjects: Amplitudes; Cold starts; Crack initiation; Crack propagation; Destructive testing; Fatigue; Fatigue cracking; Fatigue cracks; Fatigue failure; Fatigue life; Finite element method; Fracture mechanics; Glinka–Molski method; Grooves; Heat; Materials science; Mathematical models; Neuber rule; Nondestructive testing; Rotor cracking; Rotors; Shutdowns; Steam turbine; Steam turbines; Strain; Thermodynamics; Steam turbine; Glinka–Molski method; Fatigue life; Neuber rule; Rotor cracking

•Elastic and elastic-plastic finite element analyses done to study rotors cracking.•Heat grooves are the most critical areas from the viewpoint of thermal fatigue.•Predicted crack areas and number of cycles well correspond with inspections results.•Stress-strain correction rules provide lower and up...