In the present paper a hybrid approach, combining FEM simulations in the elastic field and a numerical data processing using elasto-plastic models, is applied. The aim is to investigate the main criticalities in ring and rotor designs and to estimate the maximum number of cycles up to defect initiation. In a next stage, an experimental campaign will be set up for a complete low cycle fatigue material characterization and a wide comparison among modern theories on fatigue will be performed. The present research, whose final goal is to develop a user-friendly tool for generator component life estimation at design and refurbishments stages, is supported by an Italian industry operating in the field of turbine and generators.
Low Cycle Fatigue on Coil Retaining Rings and Turbogenerator Rotors: a preliminary analysis / G. Olmi; A. Freddi. - STAMPA. - (2008), pp. 199-200. (Intervento presentato al convegno 25th Danubia-Adria Symposium tenutosi a České Budějovice, Česky Krumlov nel 24-27 Settembre 2008).
Low Cycle Fatigue on Coil Retaining Rings and Turbogenerator Rotors: a preliminary analysis
OLMI, GIORGIO;FREDDI, ALESSANDRO
2008
Abstract
In the present paper a hybrid approach, combining FEM simulations in the elastic field and a numerical data processing using elasto-plastic models, is applied. The aim is to investigate the main criticalities in ring and rotor designs and to estimate the maximum number of cycles up to defect initiation. In a next stage, an experimental campaign will be set up for a complete low cycle fatigue material characterization and a wide comparison among modern theories on fatigue will be performed. The present research, whose final goal is to develop a user-friendly tool for generator component life estimation at design and refurbishments stages, is supported by an Italian industry operating in the field of turbine and generators.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
