Abstract
This work investigates the cyclic response and low-cycle fatigue behaviour of a CuAg alloy used in crystallizer for continuous casting lines. Therefore isothermal strain-based fatigue tests are first performed on CuAg specimens at different temperature levels (20 °C, 250 °C, 300 °C). The evolution of stress-strain loops recorded during the cyclic tests is used for the parameter identification of several nonlinear hardening models (nonlinear kinematic, nonlinear isotropic). Cyclic stress-strain data from experiments are compared with results from numerical simulations with the identified material parameters, showing a satisfying agreement. Critical examination of numerical results from different models is also performed. Finally, the strain- life fatigue curves estimated from experimental data are compared with approximate strain-life equations (Universal Slopes Equation, 10% Rule) which are obtained from simple tensile tests. The material parameters determined in this work can conveniently be used as inputs in a elasto- plastic finite element simulations of a crystallizer.
Highlights
Mechanical components in steel-making plants are often exposed to cyclic thermo-mechanical loadings and exhibit a cyclic elasto-plastic behaviour and fatigue damage
Experimental stress-strain loops are used for parameter identification of nonlinear kinematic (Armstrong-Frederick, Chaboche) and nonlinear isotropic hardening models
Isothermal low-cycle fatigue tests have been performed at different temperatures (20 oC, 250 °C, 300 °C) to determine the stress-strain response and the experimental fatigue life
Summary
To cite this article: J Srnec Novak et al 2016 IOP Conf. View the article online for updates and enhancements. - Theory of Material Design for Third Order Optical Nonlinearity: Symmetric and Asymmetric Cases Kazushige Ohtawara and Kazumasa Shinjo. - A global/local model reduction approach dedicated to 3D fatigue crack growth with crack closure effect Florent Galland, Anthony Gravouil and Michel Rochette. This content was downloaded from IP address 80.182.196.70 on 26/03/2020 at 12:15. International Conference on Materials, Processing and Product Engineering 2015 (MPPE 2015) IOP Publishing IOP Conf. Series: Materials Science and Engineering 119 (2016) 012020 doi:10.1088/1757-899X/119/1/012020. J Srnec Novak, D Benasciutti, F De Bona, A Stanojević, A De Luca, Y Raffaglio
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