Edit Material Coordinates

Select Mesh→Edit→Material Coordinates… to open the Material Coordinate Editor

  • If no material coordinate model is present, or you wish to change the current one, press the Import button to select a file.

    • The material coordinate model is written in high-level syntax (sympy) and compiled into C code. If you author a new material model, the model will first have to be compiled (Compile button). This requires that the compilation environment has been set up on your server. For installation and setup instructions, see CompilingModels.

  • Use the Export button to save the current model and edit the current model in a text editor. You may use an existing model file as a template for a new one.

    • You can only change properties for models that you authored

  • Right-click the current model (top), such as MatCoordStandard, and select ‘Add Variable Inside’ to create and name intermediate symbolic or evaluated variables and write the equations that define the Dependent variable for this model, which is dY_dMatl, in terms of the Independent variables. These include World Coordinates X, Global rectangular Cartesian Coordinates Y, and their first and second derivatives with respect to local xi coordinates dX_dXi, d2X_dXi2, dY_dXi, d2Y_dXi2.

    • dY_dMatl is an orthogonal rotation matrix that transforms Global rectangular Cartesian coordinates Y to locally orthonormal Material coordinates Matl

    • Equations are entered using Sympy

  • View–>View equations displays a complete listing of the Sympy equations defining the model.

  • The Compile tab is where C code is generated from the Sympy model and compiled

    • Click the Compile button to compile the model on the default server

    • Click View–>View Source Code to generate and view a C code listing of the model

  • Click the ‘+’ next to Parameters in the model. A list of adjustable model parameters should appear.

    • Parameters are entered with their names in <anglebrackets> in the equations

    • Select a parameter in the list

      • You can edit its Description, specify its default value to be defined by a constant value or a field variable or a field variable derivative.

      • You can also add exceptions using the Add exception in… popup menu that allows alternative parameter values or fields to be specified according to a prescribed element list or a prescribed field range for a specified field variable.

  • Click the OK button to submit the Material Coordinate Transformation model to your current Continuity session.