Engineering Mechanics

Proceedings Vol. 23 (2017)

ENGINEERING MECHANICS 2017

Copyright © 2017 Brno University of Technology, Faculty of Mechanical Engineering, Institute of Solid Mechanics, Mechatronics and Biomechanics, Brno

 

Had J.
pages 362 - 365, full text

Presented work is dealt with thermo-mechanical fatigue analysis. Only elastic stress and temperature field are taken from FEM analysis. Strain components are calculated using nonlinear Maxwell model to cover both elastoplasticity and viscoplasticity. For stepwise stress history elastoplastic and viscoplastic strain component are gain independently solving one after another. For every point in loading history is consequently found closed hysteresis loop and damage increment corresponding to actual hysteresis loop is evaluated. Current damage is calculated by Prandtl-Ishlinskii model of hysteresis using iso-thermal fatigue curves.

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