Material

Material

 

Description

 

Here the keyword to read material properties from an external file is described. Note that material should be defined via Material_data structure in ParaGeo format in a separate (.mat) file (which can be exported from MATINA). In addition it should be noted that conversion of dependency tables is not supported and they should be manually defined in the .mat file using ParaGeo Spatial_table data structure (see Spatial_table). See the examplein *MATERIAL FILE for equivalence of Abaqus elastic properties defined with dependency tables with ParaGeo Spatial_table data structures.

 

 

Click to expand/collapseMATERIAL    Read material data

Usage

*MATERIAL,   NAME=Material_name, MATERIAL FILE=Material_file  

Description

This keyword is used to define Material data and its location in an external material file.  This specific material data will then be read when ParaGeo is run.   Alternatively, if the material file contains additional data; e.g. Spatial tables, then *MATERIAL FILE should be used to include all the data rather than defining individual materials with *MATERIAL.

 

Compulsory Parameters

NAME

Specifies the material data to be loaded (by name) which should be located in the specified material file.

 

Optional Parameters

MATERIAL FILE

Specifies the file name (.mat) which contains the material data to be loaded. Note that the material file should be placed in the same folder as the main problem data file.  

 

 

Examples

 

*MATERIAL, NAME=Sandstone, FILE=Material_data.mat

 

 

1Material named "Sandstone" is read from material file "Material_data.mat"

 

 

 

Click to expand/collapseMATERIAL FILE    Define an include file containing the material data

Usage

*MATERIAL FILE,   FILE=File_name

Description

This keyword is used to read an external material file when ParaGeo is run.   This will include alll the data structures defined in the material file and should be used if the material file contains additional data; e.g. Spatial tables.

 

Compulsory Parameters

FILE

Specifies the file name (.mat) which contains the material data to be loaded. Note that the material file should be placed in the same folder as the main problem data file.  

 

 

Examples

 

*MATERIAL FILE, FILE=Material_data.mat

 

 

1Data in material file "Material_data.mat" will be included (via ParaGeo Include data structure) into the ParaGeo generated data file. This ensures that Spatial tables will be read.

 

 

*ELASTIC, DEPENDENCIES=1

** YME(MPa), PR(-), temp, void_ratio

5.000E+03, 0.200, , 0.1200

4.500E+03, 0.210, , 0.1800

4.000E+03, 0.215, , 0.2500

3.500E+03, 0.220, , 0.3200

 

 

1The Abaqus elastic dependency table on the left is equivalent to the two ParaGeo Spatial_table data structures shown below were:

aYoung's modulus and Poisson's ratio are defined on separate dependency tables with single dependencies (e.g. Young's modulus only depends on void ratio).

bVoid ratio/Porosity needs to be defined previously for the model. Dependent_grids "Internal" reefers to Void ratio as an internal ParaGeo calculated variable.

cUpdate_frequency is set to 0 as the dependency is only needed to initialize the model.

 

* Spatial_table

! ---------------------------------

 Name "Young Dependency"

 Variable_name

    "Young"

 Material_names IDM=1

    "Sandstone"

 Dependent_variables IDM=1

    "Void_rat"

 Dependent_grids  IDM=1

   "Internal"

 Update_frequency

    0

 Table_size       IDM=1

    4

 Table_values   IDM=2   JDM=4

  5000 0.1200

  4500 0.1800

  4000 0.2500

  3500 0.3200

 

 

* Spatial_table

! ---------------------------------

 Name "Poisson Dependency"

 Variable_name

    "Poiss"

 Material_names IDM=1

    "Sandstone"

 Dependent_variables IDM=1

    "Void_rat"

 Dependent_grids  IDM=1

   "Internal"

 Update_frequency

    0

 Table_size       IDM=1

    4

 Table_values   IDM=2   JDM=4

  0.200 0.1200

  0.210 0.1800

  0.215 0.2500

  0.220 0.3200