FEM: examples, add another multi material

src/Mod/Fem/CMakeLists.txt

@@ -54,6 +54,7 @@ SET(FemExamples_SRCS
     femexamples/constraint_tie.py
     femexamples/examplesgui.py
     femexamples/manager.py
+    femexamples/material_multiple_bendingbeam_fiveboxes.py
     femexamples/material_multiple_twoboxes.py
     femexamples/material_nl_platewithhole.py
     femexamples/rc_wall_2d.py
@@ -71,6 +72,7 @@ SET(FemExampleMeshes_SRCS
     femexamples/meshes/mesh_constraint_tie_tetra10.py
     femexamples/meshes/mesh_contact_box_halfcylinder_tetra10.py
     femexamples/meshes/mesh_contact_tube_tube_tria3.py
+    femexamples/meshes/mesh_multibodybeam_tetra10.py
     femexamples/meshes/mesh_rc_wall_2d_tria6.py
     femexamples/meshes/mesh_section_print_tetra10.py
     femexamples/meshes/mesh_platewithhole_tetra10.py

src/Mod/Fem/femexamples/material_multiple_bendingbeam_fiveboxes.py

@@ -0,0 +1,208 @@
+# ***************************************************************************
+# *   Copyright (c) 2020 Sudhanshu Dubey <sudhanshu.thethunder@gmail.com>   *
+# *                                                                         *
+# *   This file is part of the FreeCAD CAx development system.              *
+# *                                                                         *
+# *   This program is free software; you can redistribute it and/or modify  *
+# *   it under the terms of the GNU Lesser General Public License (LGPL)    *
+# *   as published by the Free Software Foundation; either version 2 of     *
+# *   the License, or (at your option) any later version.                   *
+# *   for detail see the LICENCE text file.                                 *
+# *                                                                         *
+# *   This program is distributed in the hope that it will be useful,       *
+# *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+# *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+# *   GNU Library General Public License for more details.                  *
+# *                                                                         *
+# *   You should have received a copy of the GNU Library General Public     *
+# *   License along with this program; if not, write to the Free Software   *
+# *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  *
+# *   USA                                                                   *
+# *                                                                         *
+# ***************************************************************************
+
+# to run the example use:
+"""
+from femexamples.material_multiple_bendingbeam_fiveboxes import setup
+setup()
+"""
+
+import FreeCAD
+
+import Fem
+import ObjectsFem
+import BOPTools.SplitFeatures
+
+mesh_name = "Mesh"  # needs to be Mesh to work with unit tests
+
+
+def init_doc(doc=None):
+    if doc is None:
+        doc = FreeCAD.newDocument()
+    return doc
+
+
+def get_information():
+    info = {"name": "Multibody Analysis",
+            "meshtype": "solid",
+            "meshelement": "Tet10",
+            "constraints": ["fixed", "force"],
+            "solvers": ["calculix"],
+            "material": "solid",
+            "equation": "mechanical"
+            }
+    return info
+
+
+def setup(doc=None, solvertype="ccxtools"):
+
+    if doc is None:
+        doc = init_doc()
+
+    # geometry object
+    # name is important because the other method in this module use obj name
+    box_obj1 = doc.addObject('Part::Box', 'Box1')
+    box_obj1.Height = 10
+    box_obj1.Width = 10
+    box_obj1.Length = 20
+    box_obj2 = doc.addObject('Part::Box', 'Box2')
+    box_obj2.Height = 10
+    box_obj2.Width = 10
+    box_obj2.Length = 20
+    box_obj2.Placement.Base = (20, 0, 0)
+    box_obj3 = doc.addObject('Part::Box', 'Box3')
+    box_obj3.Height = 10
+    box_obj3.Width = 10
+    box_obj3.Length = 20
+    box_obj3.Placement.Base = (40, 0, 0)
+    box_obj4 = doc.addObject('Part::Box', 'Box4')
+    box_obj4.Height = 10
+    box_obj4.Width = 10
+    box_obj4.Length = 20
+    box_obj4.Placement.Base = (60, 0, 0)
+    box_obj5 = doc.addObject('Part::Box', 'Box5')
+    box_obj5.Height = 10
+    box_obj5.Width = 10
+    box_obj5.Length = 20
+    box_obj5.Placement.Base = (80, 0, 0)
+
+    # make a CompSolid out of the boxes, to be able to remesh with GUI
+    j = BOPTools.SplitFeatures.makeBooleanFragments(name='BooleanFragments')
+    j.Objects = [box_obj1, box_obj2, box_obj3, box_obj4, box_obj5]
+    j.Mode = "CompSolid"
+    j.Proxy.execute(j)
+    j.purgeTouched()
+    doc.recompute()
+    if FreeCAD.GuiUp:
+        for obj in j.ViewObject.Proxy.claimChildren():
+            obj.ViewObject.hide()
+
+    geom_obj = doc.addObject('Part::Feature', 'CompSolid')
+    geom_obj.Shape = j.Shape.CompSolids[0]
+    if FreeCAD.GuiUp:
+        j.ViewObject.hide()
+    doc.recompute()
+
+    if FreeCAD.GuiUp:
+        geom_obj.ViewObject.Document.activeView().viewAxonometric()
+        geom_obj.ViewObject.Document.activeView().fitAll()
+
+    # analysis
+    analysis = ObjectsFem.makeAnalysis(doc, "Analysis")
+
+    # solver
+    if solvertype == "calculix":
+        solver_object = analysis.addObject(
+            ObjectsFem.makeSolverCalculix(doc, "SolverCalculiX")
+        )[0]
+    elif solvertype == "ccxtools":
+        solver_object = analysis.addObject(
+            ObjectsFem.makeSolverCalculixCcxTools(doc, "CalculiXccxTools")
+        )[0]
+        solver_object.WorkingDir = u""
+    else:
+        FreeCAD.Console.PrintWarning(
+            "Not known or not supported solver type: {}. "
+            "No solver object was created.\n".format(solvertype)
+        )
+    if solvertype == "calculix" or solvertype == "ccxtools":
+        solver_object.SplitInputWriter = False
+        solver_object.AnalysisType = "static"
+        solver_object.GeometricalNonlinearity = "linear"
+        solver_object.ThermoMechSteadyState = False
+        solver_object.MatrixSolverType = "default"
+        solver_object.IterationsControlParameterTimeUse = False
+
+    # material
+    # material1
+    material_object1 = analysis.addObject(
+        ObjectsFem.makeMaterialSolid(doc, 'FemMaterial1'))[0]
+    material_object1.References = [(doc.Box3, "Solid1")]
+    mat = material_object1.Material
+    mat['Name'] = "Concrete-Generic"
+    mat['YoungsModulus'] = "32000 MPa"
+    mat['PoissonRatio'] = "0.17"
+    mat['Density'] = "0 kg/m^3"
+    material_object1.Material = mat
+
+    # material2
+    material_object2 = analysis.addObject(
+        ObjectsFem.makeMaterialSolid(doc, 'FemMaterial2'))[0]
+    material_object2.References = [(doc.Box2, "Solid1"), (doc.Box4, "Solid1")]
+    mat = material_object2.Material
+    mat['Name'] = "PLA"
+    mat['YoungsModulus'] = "3640 MPa"
+    mat['PoissonRatio'] = "0.36"
+    mat['Density'] = "0 kg/m^3"
+    material_object2.Material = mat
+
+    # material3
+    material_object3 = analysis.addObject(
+        ObjectsFem.makeMaterialSolid(doc, 'FemMaterial3'))[0]
+    material_object3.References = []
+    mat = material_object3.Material
+    mat['Name'] = "Steel-Generic"
+    mat['YoungsModulus'] = "200000 MPa"
+    mat['PoissonRatio'] = "0.30"
+    mat['Density'] = "7900 kg/m^3"
+    material_object3.Material = mat
+
+    # constraint fixed
+    fixed_constraint = analysis.addObject(
+        ObjectsFem.makeConstraintFixed(doc, name="ConstraintFixed")
+    )[0]
+    fixed_constraint.References = [(doc.Box1, "Face1"), (doc.Box5, "Face2")]
+
+    # force_constraint
+    force_constraint = analysis.addObject(
+        ObjectsFem.makeConstraintForce(doc, name="ConstraintForce")
+    )[0]
+    force_constraint.References = [
+        (doc.Box1, "Face6"),
+        (doc.Box2, "Face6"),
+        (doc.Box3, "Face6"),
+        (doc.Box4, "Face6"),
+        (doc.Box5, "Face6")
+    ]
+    force_constraint.Force = 10000.00
+    force_constraint.Direction = (doc.Box1, ["Edge1"])
+    force_constraint.Reversed = True
+
+    # mesh
+    from .meshes.mesh_multibodybeam_tetra10 import create_nodes, create_elements
+    fem_mesh = Fem.FemMesh()
+    control = create_nodes(fem_mesh)
+    if not control:
+        FreeCAD.Console.PrintError("Error on creating nodes.\n")
+    control = create_elements(fem_mesh)
+    if not control:
+        FreeCAD.Console.PrintError("Error on creating elements.\n")
+    femmesh_obj = analysis.addObject(
+        ObjectsFem.makeMeshGmsh(doc, mesh_name)
+    )[0]
+    femmesh_obj.FemMesh = fem_mesh
+    femmesh_obj.Part = geom_obj
+    femmesh_obj.SecondOrderLinear = False
+
+    doc.recompute()
+    return doc