Search Results for "shell finite element" - Page 3
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Showing 135 open source projects for "shell finite element"
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RAtom
solves nonlinear Kohn-Sham equation for the neutral atom.
RAtom solves nonlinear Kohn-Sham equation for the neutral atom. The adaptive algorithm based on finite element method (FEM) is implemented. Discretization of the differential eigenvalue problem is done by finite element method with Lobatto polynomials as a basis functions. High order Gauss quadratures are applied in order to obtain the total energy of atom with absolut accuracy of 1E-6 hartree. Disctretization leads to generalized eigenvalue problem, which is solved by procedures from LAPACK libraries. ... -
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RSchr-5
Solves one-electron Schrödinger equation, with SLEPc and PETSc
RSchr-5 calculates the smallest eigenvalues of the one-electron Schrödinger equation. The solved problem is defined on the finite domain, which is a box. The problem is solved with the zero Dirichlet boundary conditions. The implemented algorithm uses Finite Element Method with B-splines as basis functions. Disctretization leads to generalized eigenvalue problem. Program RSchr-5 solves the generalized eigenvalue problem by algorithms implemented in SLEPc amd PETSc libraries. ... -
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Advanced Numerical Instruments 3D
Advanced numerical instruments: adaptive meshing, FE methods, solvers
Ani3D provides portable libraries for each step in the numerical solution of systems of PDEs with variable tensorial coefficients: (1) unstructured adaptive mesh generation, (2) metric-based mesh adaptation, (3) finite element discretization and interpolation, (4) algebraic solvers. -
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The Free Finite Element Package is a library which contains numerical methods required when working with finite elements. The goal of FFEP is to provide basic functions for approximating the solution of elliptic and parabolic PDEs in 2D. Until 2016 FFEP was developed using C. Science 2016 the language was switched to GNU Octave with some C Mex-Functions.
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CFD2D
The incompressible Navier-Stokes equations solver in 2D domains
CFD2D is open source software for Linux for solving the non-dimensionalized incompressible Navier-Stokes equations (NSE) inside an arbitrary two-dimensional domain inscribed in a unit square with Dirichlet and "do-nothing" boundary conditions. The space discretization is based on Finite Element Method (FEM) using an approximately uniform triangular mesh. The two choices of FE spaces are offered, these are of the so called MINI-element and of the Taylor-Hood element. The first element consists of continuous piecewise linears with a cubic bubble function for the velocity field, and the second of continuous piecewise quadratics for the same. ... -
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Toastpp
Forward and inverse modelling in optical tomography
Toast++ is a C++ software package for modelling light transport in scattering media using the finite element method. It allows 3D reconstruction of absorption and scattering distributions inside an object from boundary measurements of light transmission, using steady state, time domain or frequency domain information. Matlab and Python bindings exist for ease of use and fast prototyping. -
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SafeConc
Calculates temperature variations and stresses in fresh concrete.
...This allows users to find out the temperature distribution, strength development, thermal stresses and risk of cracking in the body. It is based on a semi-empirical hydration model developed by Lin and Meyer in 2009, which itself is based on Arrhenius equation. It also uses finite element method to distribute heat and stresses. Strength is calculated on the basis of strength-porosity relationships. This program is very flexible and accounts for chemical composition of cement, water-cement ratio, fineness, size of the body, etc. -
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**we moved to github** https://github.com/gimli-org/gimli Geophysical Inversion and Modeling Library
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An Octave / LUA scripting language project dedicated to modeling electric motors inside the "Finite Element Method Magnetics" (FEMM) 2-D simulation program. Created to design a motor that fits inside a car wheel, experimenting in many degrees of freedo
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CALFEM is an interactive computer program for teaching the finite element method (FEM). The name CALFEM is an abbreviation of "Computer Aided Learning of the Finite Element Method".
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The Moving Finite Elements project hosts a collection of simulation codes for time-dependent PDE systems that implement various forms of Keith Miller's gradient-weighted moving finite element (GWMFE) method. The Calliope sub-project aims to provide new reference implementations in modern object-oriented Fortran. Click on the Calliope tab on the main project menu bar.
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YAFEMS
Yet Another Finite Element Method Solver
YAFEMS (Yet Another Finite Element Method Solver) is a FEM solver for Linux and WIndows that reads a MED mesh file produced by Salome (http://www.salome-platform.org/) with certain groups created into the mesh, and with the help of an input text file (.yaf), performs a 3D or 2D plane stress or plane strain analysis and creates results in plain text format and in MED format. -
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ArchNURBS
NURBS-based elastic and limit analysis of masonry arches in MATLAB
...As in CAD softwares, the geometry of the model is defined by a NURBS representation of the structure. Indeed, the user can upload geometries imported from a CAD environment. Based on such a representation, ArchNURBS performs the elastic isogeometric finite element analysis and the collapse limit analysis of the structure. It is possible to include in the analysis the presence of Fiber-Reinforced Polymers (FRP) extrados and intrados strips. A comprehensive descritpion of ArchNURBS is given in "ArchNURBS: NURBS-Based Tool for the Structural Safety Assessment of Masonry Arches in MATLAB", A. ... -
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OGFEM1d
A simple one-dimensional example of the OGFEM
We apply the Orthonormalized Generalized Finite Element Method (OGFEM) to the one-dimensional inhomogeneous modified Helmholtz equation and compare its performance with the traditional Finite Element Method (FEM). The OGFEM avoids loss of accuracy by modifying the basis such that it results in a system matrix with a condition number which is significantly lower in comparison with the condition numbers obtained by the GFEM/XFEM or SGFEM/SXFEM. -
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Advanced Numerical Instruments 2D
Advanced numerical instruments: adaptive meshing, FE methods, solvers
Ani2D provides portable libraries for each step in the numerical solution of systems of PDEs with variable tensorial coefficients: (1) unstructured adaptive mesh generation, (2) metric-based mesh adaptation, (3) finite element discretization and interpolation, (4) algebraic solvers. -
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BoneSlicer
Experimental G-Code-Generator for variable density infill in FFF parts
BoneSlicer is an experimental G-Code-Generator written in Java that allows creating load-adapted infill for 3D printed (FFF) parts, inspired by the adaptive structures of trabecular bone tissue. It uses a simple structural Finite Element Analysis to determine the distribution of mechanical stress within the part and offers tools to generate an infill structure consisting of multiple subareas of varying infill density. Subdivision of the infill area can be based on a broad spectrum of FEA result parameters. BoneSlicer relies on the Open Source software GMesh and Calculix for meshing and FEA analysis. ... -
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Impact is an explicit Finite Element Program Suite which simulates dynamic impact events. It has a range of elements, contact handling and different material laws. Models can be created, solved and analyzed with the included pre- and postprocessor. Impact is based on an Explicit Time stepping algorithm. These kind of codes are used to simulate dynamic phenomena such as car crashes and similar, usually involving large deformations.
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MT2D
An 2D magnetotellurics finite element solver using unstructured grids
MT2D is a two dimensional magnetotellurics or raido magnetotellurics forward modeling software. In terms of unstructured grids, it can deal with arbitrarily complicated models, including the surface topographies. It allows for arbitrary distributions of conductivity, permittivity and permeability. In addition, it offers two algorithms: the total field approach and the secondary field approach. At present, most of 2D MT modeling codes are developed in terms of Matlab or FORTRAN and... -
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SES Super-Encypherment Scrambler
SES brings back the uncrackable onetime pad, with a digital twist.
SES brings back the uncrackable onetime pad, with a digital twist. It is well known that a random key of message-length is the only provably unbreakable cipher. SES uses cryptographic strength pseudo-random keys of message-length for its many encipherments, in addition to offering true one-time pad capability for the intrepid. SES is built on ISAAC, Bob Jenkins' unbroken CSPRNG, a fast and simple stream cipher placed in the Public Domain in 1996. SES now gives you the ability to... -
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Nonlocal and Gradient Elasticity
Assessment of high order one-dimensional approximation schemes
These Matlab scripts illustrate the numerical solution of two one-dimensional tensile rods equipped with integro-differential and strain-gradient constitutive laws by means of classical Hermitian and Lagrangian finite element discretizations, B-spline finite element discretizations and C∞ generalized finite element discretizations. Reference M. Malagù, E. Benvenuti, C. A. Duarte, and A. Simone. One-dimensional nonlocal and gradient elasticity: Assessment of high order approximation schemes. Computer Methods in Applied Mechanics and Engineering, accepted for publication, 22 February, 2014 (www.sciencedirect.com/science/article/pii/S0045782514000723) -
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ViennaGrid is a generic mesh handling library that provides the traversal of structured and unstructured grids in arbitrary spatial dimensions, in particular 1d, 2d and 3d. Quantities can be conveniently stored on mesh elements using ViennaData.
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ciGen
ciGen is a short C++ code to generate cohesive interface elements.
Cohesive zone model (CZM) is a powerful method to study many cracking phenomena. Cohesive interface elements constitute a simple to implement yet valuable tool to implement CZM. This project provides a simple C++ code that reads a finite element mesh, modify it and generate cohesive interface elements where needed. It can read Gmsh (http://geuz.org/gmsh/) or ABAQUS input files and write the mesh to any format such as ABAQUS and jive (http://www.dynaflow.com/en_GB/jive.html). The code was written by VP Nguyen (google scholar link: http://scholar.google.com/citations?... -
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SLFFEA stands for San Le's Free Finite Element Analysis. It is a package of scientific software and graphical user interfaces for use in finite element analysis. It is written in ANSI C by San Le and distributed under the terms of the GNU license.
