1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#include "itkFEMSolver.h"
#include "itkFEMSpatialObjectWriter.h"
#include "itkFEMElement2DC0LinearQuadrilateralStress.h"
#include "itkTestingMacros.h"
int
itkFEMElement2DC0LinearQuadrilateralStressTest(int argc, char * argv[])
{
if (argc != 2)
{
std::cerr << "Missing parameters." << std::endl;
std::cerr << "Usage: " << itkNameOfTestExecutableMacro(argv) << " outputFileName" << std::endl;
return EXIT_FAILURE;
}
itk::FEMFactoryBase::RegisterDefaultTypes();
constexpr unsigned int Dimension = 2;
using Solver2DType = itk::fem::Solver<Dimension>;
auto solver = Solver2DType::New();
using FEMObjectType = itk::fem::FEMObject<Dimension>;
auto femObject = FEMObjectType::New();
using NodeType = itk::fem::Element::Node;
NodeType::Pointer n1;
n1 = NodeType::New();
itk::fem::Element::VectorType pt(Dimension);
pt[0] = 2.0;
pt[1] = 2.0;
n1->SetCoordinates(pt);
femObject->AddNextNode(n1);
n1 = NodeType::New();
pt[0] = 8.0;
pt[1] = 3.0;
n1->SetCoordinates(pt);
femObject->AddNextNode(n1);
n1 = NodeType::New();
pt[0] = 8.0;
pt[1] = 6.0;
n1->SetCoordinates(pt);
femObject->AddNextNode(n1);
n1 = NodeType::New();
pt[0] = 2.0;
pt[1] = 9.0;
n1->SetCoordinates(pt);
femObject->AddNextNode(n1);
femObject->RenumberNodeContainer();
itk::fem::MaterialLinearElasticity::Pointer m;
m = itk::fem::MaterialLinearElasticity::New();
m->SetGlobalNumber(0); /* Global number of the material */
m->SetYoungsModulus(30000000.0); /* Young modulus */
m->SetPoissonsRatio(0.3);
m->SetCrossSectionalArea(.0); /* Crossection area */
m->SetMomentOfInertia(1.0); /* Momemt of inertia */
femObject->AddNextMaterial(m);
itk::fem::Element2DC0LinearQuadrilateralStress::Pointer e1;
e1 = itk::fem::Element2DC0LinearQuadrilateralStress::New();
e1->SetGlobalNumber(0);
e1->SetNode(0, femObject->GetNode(0));
e1->SetNode(1, femObject->GetNode(1));
e1->SetNode(2, femObject->GetNode(2));
e1->SetNode(3, femObject->GetNode(3));
e1->SetMaterial(femObject->GetMaterial(0));
femObject->AddNextElement(e1);
itk::fem::LoadBC::Pointer l1;
l1 = itk::fem::LoadBC::New();
l1->SetGlobalNumber(0);
l1->SetElement(femObject->GetElement(0));
l1->SetDegreeOfFreedom(0);
l1->SetValue(vnl_vector<double>(1, 0.0));
femObject->AddNextLoad(l1);
l1 = itk::fem::LoadBC::New();
l1->SetGlobalNumber(1);
l1->SetElement(femObject->GetElement(0));
l1->SetDegreeOfFreedom(1);
l1->SetValue(vnl_vector<double>(1, 0.0));
femObject->AddNextLoad(l1);
l1 = itk::fem::LoadBC::New();
l1->SetGlobalNumber(2);
l1->SetElement(femObject->GetElement(0));
l1->SetDegreeOfFreedom(6);
l1->SetValue(vnl_vector<double>(1, 0.0));
femObject->AddNextLoad(l1);
l1 = itk::fem::LoadBC::New();
l1->SetGlobalNumber(3);
l1->SetElement(femObject->GetElement(0));
l1->SetDegreeOfFreedom(7);
l1->SetValue(vnl_vector<double>(1, 0.0));
femObject->AddNextLoad(l1);
itk::fem::LoadNode::Pointer l2;
l2 = itk::fem::LoadNode::New();
l2->SetGlobalNumber(4);
l2->SetElement(femObject->GetElement(0));
l2->SetNode(1);
vnl_vector<double> F(Dimension);
F[0] = 5;
F[1] = 0;
l2->SetForce(F);
femObject->AddNextLoad(l2);
l2 = itk::fem::LoadNode::New();
l2->SetGlobalNumber(5);
l2->SetElement(femObject->GetElement(0));
l2->SetNode(2);
vnl_vector<double> F1(Dimension);
F1[0] = 10;
F1[1] = 0;
l2->SetForce(F1);
femObject->AddNextLoad(l2);
femObject->FinalizeMesh();
solver->SetInput(femObject);
solver->Update();
// to write the deformed mesh
// Testing the fe mesh validity
using FEMObjectSpatialObjectType = itk::FEMObjectSpatialObject<Dimension>;
auto femSODef = FEMObjectSpatialObjectType::New();
femSODef->SetFEMObject(solver->GetOutput());
using FEMSpatialObjectWriterType = itk::FEMSpatialObjectWriter<Dimension>;
using FEMSpatialObjectWriterPointer = FEMSpatialObjectWriterType::Pointer;
FEMSpatialObjectWriterPointer spatialWriter = FEMSpatialObjectWriterType::New();
spatialWriter->SetInput(femSODef);
spatialWriter->SetFileName(argv[1]);
spatialWriter->Update();
std::cout << "Test PASSED!" << std::endl;
return EXIT_SUCCESS;
}
|
