ULiege - Aerospace & Mechanical Engineering http://metafor.ltas.ulg.ac.be/dokuwiki/ 2026-05-15T20:28:30+00:00 http://metafor.ltas.ulg.ac.be/dokuwiki/ http://metafor.ltas.ulg.ac.be/dokuwiki/_media/logo.png text/html 2025-04-04T11:57:22+00:00 Anonymous (anonymous@undisclosed.example.com) http://metafor.ltas.ulg.ac.be/dokuwiki/doc/user/general/fonctions?rev=1743767842&do=diff  Functions y=f(t) Functions are quite useful to describe how some parameters evolve, over time for example. They can be used to prescribe displacements or to define hardening laws. PieceWiseLinearFunction A piecewise linear function is defined one point at a time: fct = PieceWiseLinearFunction() fct.setData(abs1, ord1) fct.setData(abs2, ord2) ... text/html 2017-10-25T09:51:41+00:00 Anonymous (anonymous@undisclosed.example.com) http://metafor.ltas.ulg.ac.be/dokuwiki/doc/user/general/glossaire?rev=1508925101&do=diff Glossary If you have never used a finite element software, nor learned about nonlinear mechanics, this page will help you understand Metafor specific vocabulary. ---------- A Abaqus Commercial software suite for finite element analysis, usually considered as the reference in nonlinear mechanics. text/html 2024-05-23T13:30:26+00:00 Anonymous (anonymous@undisclosed.example.com) http://metafor.ltas.ulg.ac.be/dokuwiki/doc/user/general/ifields?rev=1716471026&do=diff Fields at Gauss Points Fields that are computed at each integration point are referenced by codes with the IF prefix (standing for Internal Field). Metafor Code Description IF_DEV_SIG_XX Cauchy stress deviator tensor (see important remark at the bottom) $\in [-1,1]$$$ \boldsymbol{\sigma}_{\text{cauchy}} = \dfrac{\mathbf{F}\,\boldsymbol{\sigma}_{\text{PK2}}\,\mathbf{F}^T}{\det(\mathbf{F}_{\text{total}})} $$ text/html 2019-11-27T16:33:37+00:00 Anonymous (anonymous@undisclosed.example.com) http://metafor.ltas.ulg.ac.be/dokuwiki/doc/user/general/locks?rev=1574872417&do=diff  Fields at Nodes Definition Nodal fields (such as the displacement, the velocity, the temperature, etc.) are defined thanks to a combination of two “codes”: a Nature and a Variant. field = Field1D(Nature, Variant) Here is a list of some Nature$x$$y$$z$$x$$y$$z$$v_x$$v_z$$v_z$$a_x$$a_y$$a_z$ text/html 2016-03-30T13:23:04+00:00 Anonymous (anonymous@undisclosed.example.com) http://metafor.ltas.ulg.ac.be/dokuwiki/doc/user/general/references?rev=1459344184&do=diff References In Python, all variables except the most basic ones are references. This means that if a is an object, b=a does not copy a into b, but means that both a and b are references pointing towards the same object. When defining a test case in Metafor, references can be used to shorten the corresponding module. For example: text/html 2020-07-31T12:52:14+00:00 Anonymous (anonymous@undisclosed.example.com) http://metafor.ltas.ulg.ac.be/dokuwiki/doc/user/general/sortingoperator?rev=1596199934&do=diff  Node Sorting Operators A set of MeshPoints must sometimes be sorted, usually to reduce a selection. SortingOperators are objects that can be used to execute this sorting operation. SortByX0() Sort by X0 in increasing order SortByY0() Sort by Y0 in increasing order text/html 2021-07-06T06:44:00+00:00 Anonymous (anonymous@undisclosed.example.com) http://metafor.ltas.ulg.ac.be/dokuwiki/doc/user/general/syntaxchange?rev=1625553840&do=diff Syntactic changes This page records the evolution of the syntax of the python input files. Version 3484 MR 33 sur GitLab unification des sens des normales pour les éléments de presssion (2D/3D), * en 2D : inverser (*-1) les valeurs de la pression et du cisaillement text/html 2016-03-30T13:23:04+00:00 Anonymous (anonymous@undisclosed.example.com) http://metafor.ltas.ulg.ac.be/dokuwiki/doc/user/general/tdfields?rev=1459344184&do=diff Thermodynamic Fields The following codes are used when thermodynamic fields are required: Metafor code Meaning THERMODYN_POT_INT internal potential THERMODYN_EN_DIS dissipated energy text/html 2016-03-30T13:23:04+00:00 Anonymous (anonymous@undisclosed.example.com) http://metafor.ltas.ulg.ac.be/dokuwiki/doc/user/general/unites?rev=1459344184&do=diff Units In Metafor, as in most FE codes, units are not explicitly defined. The user must enter input data in a consistent way. SI SI (mm) Length $\mbox{m}$ $\mbox{mm}$ Force $\mbox{N}$ $\mbox{N}$ Mass $\mbox{kg}$$\mbox{tonne}$$\mbox{s}$$\mbox{s}$$\mbox{Pa } \left ( \mbox{N}/\mbox{m}^2 \right ) $$\mbox{MPa } \left ( \mbox{N}/\mbox{mm}^2 \right ) $$\mbox{J}$$\mbox{mJ } \left ( 10^{–3} \mbox{J} \right ) …