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The MHOST finite element program: 3-D inelastic analysis methods for hot section components. Volume 1: Theoretical manualFormulations and algorithms implemented in the MHOST finite element program are discussed. The code uses a novel concept of the mixed iterative solution technique for the efficient 3-D computations of turbine engine hot section components. The general framework of variational formulation and solution algorithms are discussed which were derived from the mixed three field Hu-Washizu principle. This formulation enables the use of nodal interpolation for coordinates, displacements, strains, and stresses. Algorithmic description of the mixed iterative method includes variations for the quasi static, transient dynamic and buckling analyses. The global-local analysis procedure referred to as the subelement refinement is developed in the framework of the mixed iterative solution, of which the detail is presented. The numerically integrated isoparametric elements implemented in the framework is discussed. Methods to filter certain parts of strain and project the element discontinuous quantities to the nodes are developed for a family of linear elements. Integration algorithms are described for linear and nonlinear equations included in MHOST program.
Document ID
19910015322
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Nakazawa, Shohei
(Finite Element Factory Sunnyvale, CA, United States)
Date Acquired
September 6, 2013
Publication Date
May 1, 1991
Subject Category
Structural Mechanics
Report/Patent Number
NAS 1.26:182205
NASA-CR-182205
Accession Number
91N24636
Funding Number(s)
PROJECT: RTOP 505-63-11
CONTRACT_GRANT: NAS3-23697
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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