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A viscoelastic – viscoplastic material model for superalloy applications / J.P. Rouse, B. Engel, C.J. Hyde, S.J. Pattison, Mark Whittaker, Paul Jones, Ben Cockings, Nick Barnard

International Journal of Fatigue, Volume: 136, Start page: 105579

Swansea University Authors: Mark Whittaker, Paul Jones, Ben Cockings, Nick Barnard

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Abstract

An understanding of rate dependency over a wide range of time scales is vitally important in approximating the transient response of critical components operating in extreme environments. Many examples of viscoplastic model formulations can be found in the literature, wherein all rate dependency is...

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Published in: International Journal of Fatigue
ISSN: 0142-1123
Published: Elsevier BV 2020
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa53862
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Abstract: An understanding of rate dependency over a wide range of time scales is vitally important in approximating the transient response of critical components operating in extreme environments. Many examples of viscoplastic model formulations can be found in the literature, wherein all rate dependency is assumed to occur after yielding. Such models neglect any viscous effects during elastic deformation. In the present work, a unified viscoelastic – viscoplastic material model is developed for the Nickel superalloy RR1000. Particular emphasis is placed on model parameter determination, which is accomplished using standard cyclic plasticity and stress relaxation experimental data.
Keywords: Viscoelasticity, Viscoplasticity, Stress relaxation, RR1000, Superalloy
Start Page: 105579