An efficient finite element program for 3-D inelastic analysis of gas turbine hot section components was constructed and validated. A novel mixed iterative solution strategy is derived from the augmented Hu-Washizu variational principle in order to nodally interpolate coordinates, displacements, deformation, strains, stresses and material properties. A series of increasingly sophisticated material models incorporated in MHOST include elasticity, secant plasticity, infinitesimal and finite deformation plasticity, creep and unified viscoplastic constitutive model proposed by Walker. A library of high performance elements is built into this computer program utilizing the concepts of selective reduced integrations and independent strain interpolations. A family of efficient solution algorithms is implemented in MHOST for linear and nonlinear equation solution including the classical Newton-Raphson, modified, quasi and secant Newton methods with optional line search and the conjugate gradient method
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References in zbMATH (referenced in 2 articles )
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- Patnaik, Surya N.; Guptill, James D.; Hopkins, Dale A.: Subproblem optimization with regression and neural network approximators (2005)
- Gendy, A. S.; Patnaik, S. N.; Hopkins, D. A.; Berke, L.: Optimization of Space Station components using design code CometBoards (1996)