Browsing College of Engineering and Informatics by Author "O'Donoghue, P. E."
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An improved unified viscoplastic model for strain-rate sensitivity in high temperature fatigue
Barrett, Richard A.; O'Donoghue, P. E.; Leen, Sean B. (Elsevier ScienceDirect, 2013-11-21)An improved unified cyclic viscoplastic material model for high temperature fatigue of P91 steel is presented. The primary enhancement over existing models is in relation to strain-rate independence of parameters, for ... -
A unified viscoplastic model for high temperature low cycle fatigue of service-aged P91 steel
Barrett, R.A.; Farragher, T. P.; Hyde, C. J.; O'Dowd, N. P.; O'Donoghue, P. E.; Leen, Sean B. (American Society of Mechanical Engineers, 2014-01-07)The finite element (FE) implementation of a hyperbolic sine unified cyclic viscoplasticity model is presented. The hyperbolic sine flow rule facilitates the identification of strain-rate independent material parameters for ...