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A simplified method for elastic-plastic-creep structural analysisA simplified inelastic analysis computer program (ANSYPM) was developed for predicting the stress-strain history at the critical location of a thermomechanically cycled structure from an elastic solution. The program uses an iterative and incremental procedure to estimate the plastic strains from the material stress-strain properties and a plasticity hardening model. Creep effects are calculated on the basis of stress relaxation at constant strain, creep at constant stress or a combination of stress relaxation and creep accumulation. The simplified method was exercised on a number of problems involving uniaxial and multiaxial loading, isothermal and nonisothermal conditions, dwell times at various points in the cycles, different materials and kinematic hardening. Good agreement was found between these analytical results and nonlinear finite element solutions for these problems. The simplified analysis program used less than 1 percent of the CPU time required for a nonlinear finite element analysis.
Document ID
19840006474
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kaufman, A.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 4, 2013
Publication Date
January 1, 1984
Subject Category
Structural Mechanics
Report/Patent Number
NAS 1.15:83509
E-1855-1
NASA-TM-83509
Meeting Information
Meeting: Ann. Intern. Gas Turbine Conference
Location: Amsterdam
Start Date: June 3, 1984
End Date: June 7, 1984
Sponsors: ASME
Accession Number
84N14542
Funding Number(s)
PROJECT: RTOP 505-32-22
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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