FEM: elmer unit tests, add ccx canti faceload

src/Mod/Fem/CMakeLists.txt

@@ -254,6 +254,7 @@ SET(FemTestsCcx_SRCS
 SET(FemTestsElmer_SRCS
     femtest/data/elmer/__init__.py
     femtest/data/elmer/case_mm.sif
+    femtest/data/elmer/elmer_ccxcanti_faceload_mm.sif
     femtest/data/elmer/group_mesh.geo
     femtest/data/elmer/ELMERSOLVER_STARTINFO
 )

src/Mod/Fem/femexamples/ccx_cantilever_faceload.py

@@ -73,7 +73,10 @@ def setup_cantileverbase(doc=None, solvertype="ccxtools"):
         )[0]
         solver_object.WorkingDir = u""
     elif solvertype == "elmer":
-        analysis.addObject(ObjectsFem.makeSolverElmer(doc, "SolverElmer"))
+        solver_object = analysis.addObject(
+            ObjectsFem.makeSolverElmer(doc, "SolverElmer")
+        )[0]
+        ObjectsFem.makeEquationElasticity(doc, solver_object)
     elif solvertype == "z88":
         analysis.addObject(ObjectsFem.makeSolverZ88(doc, "SolverZ88"))
     if solvertype == "calculix" or solvertype == "ccxtools":
@@ -93,7 +96,9 @@ def setup_cantileverbase(doc=None, solvertype="ccxtools"):
     mat["YoungsModulus"] = "210000 MPa"
     mat["PoissonRatio"] = "0.30"
     mat["Density"] = "7900 kg/m^3"
-    mat["ThermalExpansionCoefficient"] = "0.012 mm/m/K"
+    if solvertype == "elmer":
+        # set ThermalExpansionCoefficient, elmer elasticity needs it FIXME
+        mat["ThermalExpansionCoefficient"] = "0.012 mm/m/K"
     material_object.Material = mat
 
     # fixed_constraint

src/Mod/Fem/femtest/app/test_solver_elmer.py

@@ -150,3 +150,47 @@ class TestSolverElmer(unittest.TestCase):
         self.assertFalse(ret, "GMSH geo write file test failed.\n{}".format(ret))
 
         fcc_print("--------------- End of FEM tests solver framework solver Elmer -----------")
+
+    # ********************************************************************************************
+    def test_elmer_ccxcanti_faceload(
+        self
+    ):
+        fcc_print("\n------------- Start of FEM elmer tests for ccx cantilever faceload -------")
+
+        # set up the Elmer static analysis example
+        from femexamples.ccx_cantilever_faceload import setup
+        setup(self.document, "elmer")
+
+        solver_obj = self.document.SolverElmer
+
+        base_name = "elmer_ccxcanti_faceload"
+        analysis_dir = testtools.get_unit_test_tmp_dir(self.temp_dir, solver_obj.Name)
+
+        # save the file
+        save_fc_file = join(analysis_dir, solver_obj.Name + "_" + base_name + ".FCStd")
+        fcc_print("Save FreeCAD file to {}...".format(save_fc_file))
+        self.document.saveAs(save_fc_file)
+
+        # write input files
+        fcc_print("Checking FEM input file writing for Elmer solver framework solver ...")
+        machine_elmer = solver_obj.Proxy.createMachine(
+            solver_obj,
+            analysis_dir,
+            True
+        )
+        machine_elmer.target = femsolver.run.PREPARE
+        machine_elmer.start()
+        machine_elmer.join()  # wait for the machine to finish.
+
+        # compare case input file
+        test_file_dir_elmer = join(testtools.get_fem_test_home_dir(), "elmer")
+        fcc_print(test_file_dir_elmer)
+
+        fcc_print("Test writing case file")
+        casefile_given = join(test_file_dir_elmer, "elmer_ccxcanti_faceload_mm.sif")
+        casefile_totest = join(analysis_dir, "case.sif")
+        fcc_print("Comparing {} to {}".format(casefile_given, casefile_totest))
+        ret = testtools.compare_files(casefile_given, casefile_totest)
+        self.assertFalse(ret, "case write file test failed.\n{}".format(ret))
+
+        fcc_print("--------------- End of FEM elmer tests for ccx cantilever faceload ---------")

src/Mod/Fem/femtest/data/elmer/elmer_ccxcanti_faceload_mm.sif

@@ -0,0 +1,90 @@
+Check Keywords Warn
+
+Header
+  Mesh DB "."
+End
+
+Solver 1
+  Bubbles = Logical False
+  Calculate Pangle = Logical False
+  Calculate Principal = Logical False
+  Calculate Strains = Logical False
+  Calculate Stresses = Logical False
+  Displace mesh = Logical False
+  Eigen Analysis = Logical False
+  Eigen System Values = Integer 5
+  Equation = String "Elasticity"
+  Exec Solver = String "Always"
+  Linear System Abort Not Converged = Logical False
+  Linear System Convergence Tolerance = Real 1e-08
+  Linear System Iterative Method = String "BiCGStab"
+  Linear System Max Iterations = Integer 500
+  Linear System Precondition Recompute = Integer 1
+  Linear System Preconditioning = String "ILU0"
+  Linear System Residual Output = Integer 1
+  Linear System Solver = String "Iterative"
+  Optimize Bandwidth = Logical True
+  Procedure = File "StressSolve" "StressSolver"
+  Stabilize = Logical True
+  Steady State Convergence Tolerance = Real 1e-05
+  Variable = String "Displacement"
+  Variable DOFs = Integer 3
+End
+
+Simulation 
+  BDF Order = Integer 1
+  Coordinate Mapping(3) = Integer 1 2 3
+  Coordinate System = String "Cartesian 3D"
+  Output Intervals = Integer 1
+  Simulation Type = String "Steady state"
+  Steady State Max Iterations = Integer 1
+  Steady State Min Iterations = Integer 0
+  Timestepping Method = String "BDF"
+  Use Mesh Names = Logical True
+End
+
+Constants 
+End
+
+Body 1
+  Equation = Integer 1
+  Material = Integer 1
+  Name = String "Solid1"
+End
+
+Material 1
+  Density = Real 7.9e-06
+  Heat expansion Coefficient = Real 1.2e-05
+  Poisson ratio = Real 0.3
+  Youngs Modulus = Real 210000000.0
+End
+
+Equation 1
+  Active Solvers(2) = Integer 1 2
+End
+
+Solver 2
+  Equation = String "ResultOutput"
+  Exec Solver = String "After simulation"
+  Output File Name = File "case"
+  Procedure = File "ResultOutputSolve" "ResultOutputSolver"
+  Vtu Format = Logical True
+End
+
+Boundary Condition 1
+  Displacement 1 = Real 0.0
+  Displacement 2 = Real 0.0
+  Displacement 3 = Real 0.0
+  Name = String "Face1"
+End
+
+Boundary Condition 2
+  Force 1 = Real -0.0
+  Force 1 Normalize by Area = Logical True
+  Force 2 = Real -0.0
+  Force 2 Normalize by Area = Logical True
+  Force 3 = Real -9000000000.0
+  Force 3 Normalize by Area = Logical True
+  Name = String "Face2"
+End
+

src/Mod/Fem/femtest/test_commands.sh

@@ -83,6 +83,7 @@ make -j 4 && ./bin/FreeCADCmd -t femtest.app.test_result.TestResult.test_rho
 make -j 4 && ./bin/FreeCADCmd -t femtest.app.test_result.TestResult.test_disp_abs
 make -j 4 && ./bin/FreeCADCmd -t femtest.app.test_solver_calculix.TestSolverCalculix.test_solver_calculix
 make -j 4 && ./bin/FreeCADCmd -t femtest.app.test_solver_elmer.TestSolverElmer.test_solver_elmer
+make -j 4 && ./bin/FreeCADCmd -t femtest.app.test_solver_elmer.TestSolverElmer.test_elmer_ccxcanti_faceload
 
 
 # methods in FreeCAD
@@ -316,3 +317,8 @@ import unittest
 unittest.TextTestRunner().run(unittest.TestLoader().loadTestsFromName(
     'femtest.app.test_solver_elmer.TestSolverElmer.test_solver_elmer'
 ))
+
+import unittest
+unittest.TextTestRunner().run(unittest.TestLoader().loadTestsFromName(
+    'femtest.app.test_solver_elmer.TestSolverElmer.test_elmer_ccxcanti_faceload'
+))