ABSTRACT
Several theories of creep and creep rupture are reviewed.
Specific attention is devoted to the brittle damage theory
proposed by Kachanov. Creep, damage and life predictions for
rectangular or circular cross section beams under bending
and tensile loads are presented. Comparison with data for a
Ni Superalloy showed life predictions could be 30X in excess
of experimental values. This beam model also revealed that
it is imperative that no bending moments be inadvertently
applied during tensile creep testing. The creep-damage
material model is· extended to multidimensional situations.
A refinement, whereby no damage accumulates in compression,
is incorporated. A User-Material subroutine for this
constitutive model has been formulated, and incorporated
into the ABAQUS FEM package. Several verification examples
are presented; one example is the creep-damage behaviour of
a notched bar in tension. The value of reference stress
techniques is discussed. Reference stress estimates for a
centrifugally loaded bar, as well as for a cantilever under
distributed loads, are presented. These could be useful in
turbine blade design.
SIEBURG, H (2021). Creep Predictions For Turbomachinery Components. Afribary. Retrieved from https://afribary.com/works/creep-predictions-for-turbomachinery-components
SIEBURG, H.O. "Creep Predictions For Turbomachinery Components" Afribary. Afribary, 15 May. 2021, https://afribary.com/works/creep-predictions-for-turbomachinery-components. Accessed 23 Nov. 2024.
SIEBURG, H.O. . "Creep Predictions For Turbomachinery Components". Afribary, Afribary, 15 May. 2021. Web. 23 Nov. 2024. < https://afribary.com/works/creep-predictions-for-turbomachinery-components >.
SIEBURG, H.O. . "Creep Predictions For Turbomachinery Components" Afribary (2021). Accessed November 23, 2024. https://afribary.com/works/creep-predictions-for-turbomachinery-components