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  • RPI SCOREC - Technical Reports
    two dimensional Eulerian finite element formulation for modeling isotropic elastoviscoplastic steady state deformations which is capable of predicting residual stresses is presented in this paper This problem is solved in two parts namely solution of the boundary value problem by a mixed finite element formulation for the velocity and pressure fields and integration of the constitutive equations along pathlines across the domain In this formulation a discontinuous pressure field is

    Original URL path: http://www.scorec.rpi.edu/reports/view_report.php?id=273 (2015-07-15)
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  • RPI SCOREC - Technical Reports
    The method of Tarantola based on Bayesian statistical theory for solving general inverse problems is applied to inverse elasticity problems and is compared to the spatial regularization technique presented in Schnur and Zabaras It is shown that when normal Gaussian distributions are assumed and the error in the data is uncorrelated the Bayesian statistical theory takes a form similar to the deterministic regularization method presented earlier in Schnur and Zabaras

    Original URL path: http://www.scorec.rpi.edu/reports/view_report.php?id=274 (2015-07-15)
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  • RPI SCOREC - Technical Reports
    method involves the solution of the Lagrangian form of the conservation of mass equation for the two dimensional finite deformation gradient field within discrete deforming domains We apply this technique to the unfaulted protothrust zone PTZ along a western transect across the Nankai accretionary prism in the vicinity of Deep Sea Drilling Project sites 582 and 583 The results yield horizontal shortening estimates of about 1 7 km or about

    Original URL path: http://www.scorec.rpi.edu/reports/view_report.php?id=275 (2015-07-15)
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  • RPI SCOREC - Technical Reports
    the development of numerical tools based on inverse methodology for the design of steady forming processes such as drawing and rolling The inverse design problem discussed herein is to determine the best process geometry to obtain as close as possible a desired material state in the product The solution procedure follows three main steps sensitivity analysis function minimization and examination of results The adjoint method is used for determining the

    Original URL path: http://www.scorec.rpi.edu/reports/view_report.php?id=276 (2015-07-15)
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  • RPI SCOREC - Technical Reports
    model is used for the analysis The deformation in each crystal is assumed to be composed of three parts plastic slip along crystallographic slip systems an elastic stretch of the lattice and a rigid rotation of the lattice It is commonly believed that for metals at large strains since the elastic strains are very small compared to the plastic strains the elastic part of the deformation can be neglected in

    Original URL path: http://www.scorec.rpi.edu/reports/view_report.php?id=277 (2015-07-15)
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  • RPI SCOREC - Technical Reports
    Journal for Numerical Methods in Engineering Volume 37 Pages 877 891 Abstract In reference 1 a class of extraction formulations were developed to recover solution quantities with superconvergent accuracy As a continuation this paper documents some new developments in the boundary stress extraction method to expand its applications to boundary locations that are not traction free Furthermore the convergence characteristics of the extracted pointwise stress is investigated in an h

    Original URL path: http://www.scorec.rpi.edu/reports/view_report.php?id=278 (2015-07-15)
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  • RPI SCOREC - Technical Reports
    International Journal for Numerical Methods in Engineering Volume 37 Pages 827 838 Abstract An adaptive global local refinement strategy based on the interior error estimates of the h method is proposed Adaptive global local refinement strategy is aimed at constructing nearly optimal finite element meshes where the force transfer to the local region of interest is sufficiently accurate so that the local phenomena of interest is resolved with a user

    Original URL path: http://www.scorec.rpi.edu/reports/view_report.php?id=280 (2015-07-15)
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  • RPI SCOREC - Technical Reports
    AIAA Journal Volume 32 Pages 748 757 Abstract An adaptive finite element methodology for unsteady compressible aerodynamics is presented The automated adaptive environment consists of the Finite Quadtree automatic mesh generator a time discontinuous Galerkin Least Squares finite element flow solver an error indicator based upon interpolation estimates and a mesh enrichment procedure Specifically a linear space time wedge element formulation was developed and implemented for two dimensional problems with

    Original URL path: http://www.scorec.rpi.edu/reports/view_report.php?id=281 (2015-07-15)
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