FEM MaterialMechanicalNonlinear/en: Difference between revisions

From FreeCAD Documentation
(Updating to match new version of source page)
(Updating to match new version of source page)
 
(13 intermediate revisions by the same user not shown)
Line 1: Line 1:
<languages/>
<languages/>
{{UnfinishedDocu{{#translation:}}}}
{{Docnav|[[FEM_MaterialFluid|Material for fluid]]|[[Material_editor|Material editor]]|[[FEM_Module|FEM]]|IconL=FEM_MaterialFluid.png|IconC=Workbench_FEM.svg|IconR=Arch_Material_Group.svg}}


{{Docnav
{{GuiCommand|Name=FEM MaterialMechanicalNonlinear|MenuLocation= Model → Nonlinear mechanical material||Workbenches=[[Fem Workbench|FEM]]|Shortcut=|SeeAlso=[[FEM_tutorial|FEM tutorial]]}}
|[[FEM_MaterialFluid|Material for fluid]]
|[[FEM_MaterialReinforced|Reinforced material (concrete)]]
|[[FEM_Workbench|FEM]]
|IconL=FEM_MaterialFluid.svg
|IconR=FEM_MaterialReinforced.svg
|IconC=Workbench_FEM.svg
}}


{{GuiCommand
|Name=FEM MaterialMechanicalNonlinear
|MenuLocation=Model → Materials → Nonlinear mechanical material
|Workbenches=[[FEM_Workbench|FEM]]
|SeeAlso=[[FEM_tutorial|FEM tutorial]]
}}


==Description==


Creates a nonlinear mechanical material. Currently, only plasticity with simple (isotropic) hardening is available. {{Version|1.0}}: Kinematic hardening is also available.
ToDo


==Usage==


# To create a new MaterialMechanicalNonlinear object do the following:
<br />
#* Add a {{Button|[[Image:FEM_MaterialSolid.svg|16px]] [[FEM_MaterialSolid|Material for solid]]}} first and select it.
#* Click the {{Button|[[Image:FEM MaterialMechanicalNonlinear.svg|16px]] [[FEM MaterialMechanicalNonlinear|Nonlinear mechanical material]]}} button or choose the {{MenuCommand|Model → Materials → [[Image:FEM_MaterialMechanicalNonlinear.svg|16px]] Nonlinear mechanical material‏‎}} option from the menu.
# To edit an existing MaterialMechanicalNonlinear object:
#* Select it in the [[Tree_view|Tree view]].
#* Select the material model (isotropic (simple) hardening or {{Version|1.0}}: kinematic hardening).
#* Define yield points (stress [MPa] vs plastic strain). The first point must have a zero plastic strain. Press the {{Button|...}} button next to {{PropertyData|Yield Points}} to input the points using a user-friendly list. The syntax is described in the [[#Notes|Notes]] section.


==Notes==
{{Docnav|[[FEM_MaterialFluid|Material for fluid]]|[[Material_editor|Material editor]]|[[FEM_Module|FEM]]|IconL=FEM_MaterialFluid.png|IconC=Workbench_FEM.svg|IconR=Arch_Material_Group.svg}}


* In FreeCAD 0.19 and older versions, only 3 yield points can be specified. Since version 0.20 a list of yield points can contain as many as required.
{{FEM Tools navi}}
* The syntax should be:


: {{Code|code=
{{Userdocnavi}}
stress_1, 0
{{clear}}
stress_2, plastic_strain_2
...
}}

: With dot as the decimal separator since that's what CalculiX uses.

: For example to define a bilinear model with hardening for S275 steel:

: {{Code|code=
275, 0
490, 0.2
}}

: Or, to define perfect plasticity with no hardening for this material:

: {{Code|code=
275, 0
}}


{{Docnav
|[[FEM_MaterialFluid|Material for fluid]]
|[[FEM_MaterialReinforced|Reinforced material (concrete)]]
|[[FEM_Workbench|FEM]]
|IconL=FEM_MaterialFluid.svg
|IconR=FEM_MaterialReinforced.svg
|IconC=Workbench_FEM.svg
}}

{{FEM Tools navi{{#translation:}}}}
{{Userdocnavi{{#translation:}}}}

Latest revision as of 10:04, 21 April 2024

FEM MaterialMechanicalNonlinear

Menu location
Model → Materials → Nonlinear mechanical material
Workbenches
FEM
Default shortcut
None
Introduced in version
-
See also
FEM tutorial

Description

Creates a nonlinear mechanical material. Currently, only plasticity with simple (isotropic) hardening is available. introduced in version 1.0: Kinematic hardening is also available.

Usage

  1. To create a new MaterialMechanicalNonlinear object do the following:
  2. To edit an existing MaterialMechanicalNonlinear object:
    • Select it in the Tree view.
    • Select the material model (isotropic (simple) hardening or introduced in version 1.0: kinematic hardening).
    • Define yield points (stress [MPa] vs plastic strain). The first point must have a zero plastic strain. Press the ... button next to DataYield Points to input the points using a user-friendly list. The syntax is described in the Notes section.

Notes

  • In FreeCAD 0.19 and older versions, only 3 yield points can be specified. Since version 0.20 a list of yield points can contain as many as required.
  • The syntax should be:
stress_1, 0
stress_2, plastic_strain_2
...
With dot as the decimal separator since that's what CalculiX uses.
For example to define a bilinear model with hardening for S275 steel:
275, 0
490, 0.2
Or, to define perfect plasticity with no hardening for this material:
275, 0