Title

Modeling The Tertiary Creep Damage Behavior Of A Transversely-Isotropic Material Under Multiaxial And Periodic Loading Conditions

Keywords

Continuum damage mechanics; Creep-damage; Kachanov-Rabotnov; Multiaxial; Periodic loading; Rupture prediction; Transversely-isotropic; Void induced anisotropy

Abstract

Despite the advent of single crystal turbine blades, the aerospace and industrial gas turbine industries have continued to use directionally-solidified turbine blades due to higher manufacturing yields. These transversely-isotropic turbine blades are subjected to high temperature multiaxial cyclic loading conditions which lead to complex creep strain histories. Few tensor-based constitutive models have been developed that accurately model creep-damage behavior. This paper describes an anisotropic tertiary creep damage model for transversely-isotropic materials. The model is a tensorial expansion of the Kachanov-Rabotnov isotropic creep damage formulation. The analytical techniques required to determine the associated material constants are derived and demonstrated. The model is shown to accurately model a directionally-solidified Ni-base superalloy. A parametric study under biaxial and hydrostatic loading is conducted and the resulting creep strain tensor is evaluated. A series of periodic loading simulations are conducted to examine the stress-strain behavior and damage evolution during ratcheting. Copyright © 2010 by ASME.

Publication Date

12-1-2010

Publication Title

American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP

Volume

3

Number of Pages

445-455

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1115/PVP2010-25041

Socpus ID

80155146624 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/80155146624

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