Techno Press
Techno Press

Structural Engineering and Mechanics   Volume 30, Number 6, December20 2008, pages 665-678
Bree?s interaction diagram of beams with considering creep and ductile damage
A. Nayebi

Abstract     [Full Text]
    The beams components subjected to the loading such as axial, bending and cyclic thermal loads were studied in this research. The used constitutive equations are those of elasto-plasticity coupled to ductile and/or creep damage. The nonlinear kinematic hardening behavior was considered in elastoplasticity modeling. The unified damage law proposed for ductile failure and fatigue by the author of Sermage et al. (2000) and Kachanov?s creep damage model applied to cyclic creep and low cycle fatigue of beams. Based on the results of the analysis, the shakedown limit loads were determined through the calculation of the residual strains developed in the beam analysis. The iterative technique determines the shakedown limit load in an iterative manner by performing a series of full coupled elastic.plastic and continuum damage cyclic loading modeling. The maximum load carrying capacity of the beam can withstand, were determined and imposed on the Bree?s interaction diagram. Comparison between the shakedown diagrams generated by or without creep and/or ductile damage for the loading patterns was presented.
Key Words
    Bree?s diagram; ductile damage; creep damage; cyclic loading; nonlinear kinematic hardening.
A. Nayebi: Dept. of Mechanical Engineering, School of Engineering, Shiraz University, Shiraz, Iran

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