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Comparison of elastic and elastic-plastic structural analyses for cooled turbine blade airfoils
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TLDR
In this article, the von Mises effective total strains at maximum takeoff were computed from the elastic and elastic plastic finite element analyses with 9 percent for rotating airfoils and 28 percent for stationary airfoILS with the elastic results on the conservative side.Abstract:
Elastic plastic stress strain states in cooled turbine blade airfoils were calculated by three methods for the initial takeoff transient of an advanced technology aircraft engine. The three analytical methods compared were a three dimensional elastic plastic, finite element analysis, a three dimensional, elastic, finite element analysis, and a one dimensional, elastic plastic, beam theory analysis. Structural analyses were performed for eight cases involving different combinations of mechanical and thermal loading on impingement cooled airfoils with and without leading edge film cooling holes. The von Mises effective total strains at maximum takeoff computed from the elastic and elastic plastic finite element analyses agreed with 9 percent for rotating airfoils and 28 percent for stationary airfoils with the elastic results on the conservative side.read more
Citations
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Journal ArticleDOI
Effects of Strain Hardening on Response of Skin Panels in Hypersonic Flow
TL;DR: In this paper, a fluid-thermal-structural-material interactions framework is used to investigate the response of elastic and elastic-plastic panels subjected to multiple loading cycles, and a fatigue analysis is conducted using a linear cumulative damage rule.
Development of a simplified procedure for cyclic structural analysis
TL;DR: In this paper, a simplified inelastic analysis computer program (ANSYMP) was extended for predicting the stress-strain history at the critical location of a thermomechanically cycled structure from an elastic solution.
Proceedings ArticleDOI
A Unified Approach to Turbine Blade Life Prediction
B.L Lewis,L.R. Beckwith +1 more
Local strain redistribution corrections for a simplified inelastic analysis procedure based on an elastic finite-element analysis
A. Kaufman,S. Y. Hwang +1 more
TL;DR: In this article, a simplified inelastic analysis procedure was developed to economically calculate material cyclic response at critical location of a structure for life prediction proposes, based on the assumption that the plastic region in the structure is local and the total strain history required for input can be defined from elastic finite-element analyses.
Simplified method for nonlinear structural analysis
TL;DR: In this article, a simplified inelastic analysis computer program was developed for predicting the stress-strain history of a thermomechanically cycled structure from an elastic solution, using an iterative and incremental procedure to estimate the plastic strains from the material stressstrain properties and a simulated plasticity hardening model.
References
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S. S. Manson,T. J. Dolan +1 more
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S. S. Manson,G. R. Halford +1 more
TL;DR: Strain-range partitioning is a recently developed method for treating creep-fatigue interaction at elevated temperature as discussed by the authors, which can be extended to treat multiaxiality through a set of rules for combining the strain components in the three principal directions.
Tensile and creep rupture properties of (16) uncoated and (2) coated engineering alloys at elevated temperatures
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TL;DR: In this article, the cast remelt stock was cast into test blanks with two such materials being also evaluated after Jocoat coating was applied and the tests were conducted at temperatures applicable to the service temperature of the various alloys.
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