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The analysis of creep-damage processes is becoming more and more
important in engineering practice due to the fact that the exploitation
conditions like temperature and pressure are increasing while
the weight of the structure should decrease. In the same time the
safety standards are increasing too. The accuracy of the mechanical
state estimation (stresses, strains and displacements) mainly depends on
the introduced constitutive equations and on the chosen structural
analysis model. For the first purpose an improved generalized
phenomenological creep model is introduced and extended to the case
of creep-damage coupling. In addition, a micromechanical-based model
is discussed. For thin-walled structures under creep-damage conditions
the advantages and the problems of different approaches are briefly discussed.
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