Aircraft gas turbine components are subjected to severe operating conditions. High temperatures, large thermal strains, and mechanical loads combine to cause the material to undergo significant nonlinear behavior. In order to assure safe, durable components, it is necessary that analysis methods be available to predict the nonlinear deformation. General purpose finite element codes are available to perform elastic and viscoplastic analyses, but the analyses are expensive. Both large plastic and creep strain analyses can require significant computer resources, but typically a plastic solution is more economical to run than a time-stepping creep or viscoplastic model solution. For those applications where the deformation is principally time dependent, it is advantageous to include time-dependent creep effects in a “constant time” or “isochronous” analysis. Although this approach has been used in the past to estimate rupture life, this paper will present several significant new techniques for doing an isochronous analysis to analyze time-dependent deformation.
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April 1995
Research Papers
Load Control–Strain Control Isochronous Stress–Strain Curves for High Temperature Nonlinear Analysis
G. S. Bechtel,
G. S. Bechtel
GE Aircraft Engines, Cincinnati, OH 45215
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T. S. Cook
T. S. Cook
GE Aircraft Engines, Cincinnati, OH 45215
Search for other works by this author on:
G. S. Bechtel
GE Aircraft Engines, Cincinnati, OH 45215
T. S. Cook
GE Aircraft Engines, Cincinnati, OH 45215
J. Eng. Gas Turbines Power. Apr 1995, 117(2): 364-370 (7 pages)
Published Online: April 1, 1995
Article history
Received:
March 1, 1993
Online:
November 19, 2007
Citation
Bechtel, G. S., and Cook, T. S. (April 1, 1995). "Load Control–Strain Control Isochronous Stress–Strain Curves for High Temperature Nonlinear Analysis." ASME. J. Eng. Gas Turbines Power. April 1995; 117(2): 364–370. https://doi.org/10.1115/1.2814103
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