public static void EmbeddedElementsBuilder(Model model)
{
// define mechanical properties
double youngModulus = 1.0;
double shearModulus = 1.0;
double poissonRatio = (youngModulus / (2 * shearModulus)) - 1;
double area = 1776.65; // CNT(20,20)-LinearEBE-TBT-L = 10nm
double inertiaY = 1058.55;
double inertiaZ = 1058.55;
double torsionalInertia = 496.38;
double effectiveAreaY = area;
double effectiveAreaZ = area;
// Geometry
model.NodesDictionary.Add(9, new Node(id: 9, x: 0.00, y: 0.00, z: 0.00));
model.NodesDictionary.Add(10, new Node(id: 10, x: 10.00, y: 0.00, z: 0.00));
// Create new 3D material
var beamMaterial = new ElasticMaterial3D()
{
YoungModulus = youngModulus,
PoissonRatio = poissonRatio,
};
// Create new Beam3D section and element
var beamSection = new BeamSection3D(area, inertiaY, inertiaZ, torsionalInertia, effectiveAreaY, effectiveAreaZ);
// element nodes
var elementNodes = new List <Node>();
elementNodes.Add(model.NodesDictionary[9]);
elementNodes.Add(model.NodesDictionary[10]);
var beam = new Beam3DCorotationalQuaternion(elementNodes, beamMaterial, 7.85, beamSection);
var beamElement = new Element {
ID = 2, ElementType = beam
};
beamElement.NodesDictionary.Add(9, model.NodesDictionary[9]);
beamElement.NodesDictionary.Add(10, model.NodesDictionary[10]);
model.ElementsDictionary.Add(beamElement.ID, beamElement);
model.SubdomainsDictionary[1].Elements.Add(beamElement);
}
public void CantileverYBeam3DQuaternionNonlinearTest()
{
double youngModulus = 21000.0;
double poissonRatio = 0.3;
double nodalLoad = 20000.0;
double area = 91.04;
double inertiaY = 2843.0;
double inertiaZ = 8091.0;
double torsionalInertia = 76.57;
double effectiveAreaY = 91.04;
double effectiveAreaZ = 91.04;
int nNodes = 3;
int nElems = 2;
int monitorNode = 3;
// Create new 3D material
var material = new ElasticMaterial3D
{
YoungModulus = youngModulus,
PoissonRatio = poissonRatio,
};
// Node creation
IList <Node> nodes = new List <Node>();
Node node1 = new Node(id: 1, x: 0.0, y: 0.0, z: 0.0);
Node node2 = new Node(id: 2, x: 100.0, y: 0.0, z: 0.0);
Node node3 = new Node(id: 3, x: 200.0, y: 0.0, z: 0.0);
nodes.Add(node1);
nodes.Add(node2);
nodes.Add(node3);
// Model creation
Model model = new Model();
// Add a single subdomain to the model
model.SubdomainsDictionary.Add(1, new Subdomain(1));
// Add nodes to the nodes dictonary of the model
for (int i = 0; i < nodes.Count; ++i)
{
model.NodesDictionary.Add(i + 1, nodes[i]);
}
// Constrain bottom nodes of the model
model.NodesDictionary[1].Constraints.Add(new Constraint {
DOF = StructuralDof.TranslationX
});
model.NodesDictionary[1].Constraints.Add(new Constraint {
DOF = StructuralDof.TranslationY
});
model.NodesDictionary[1].Constraints.Add(new Constraint {
DOF = StructuralDof.TranslationZ
});
model.NodesDictionary[1].Constraints.Add(new Constraint {
DOF = StructuralDof.RotationX
});
model.NodesDictionary[1].Constraints.Add(new Constraint {
DOF = StructuralDof.RotationY
});
model.NodesDictionary[1].Constraints.Add(new Constraint {
DOF = StructuralDof.RotationZ
});
// Generate elements of the structure
int iNode = 1;
for (int iElem = 0; iElem < nElems; iElem++)
{
// element nodes
IList <Node> elementNodes = new List <Node>();
elementNodes.Add(model.NodesDictionary[iNode]);
elementNodes.Add(model.NodesDictionary[iNode + 1]);
// Create new Beam3D section and element
var beamSection = new BeamSection3D(area, inertiaY, inertiaZ, torsionalInertia, effectiveAreaY, effectiveAreaZ);
var beam = new Beam3DCorotationalQuaternion(elementNodes, material, 7.85, beamSection);
// Create elements
var element = new Element()
{
ID = iElem + 1,
ElementType = beam
};
// Add nodes to the created element
element.AddNode(model.NodesDictionary[iNode]);
element.AddNode(model.NodesDictionary[iNode + 1]);
var a = beam.StiffnessMatrix(element);
//var writer = new FullMatrixWriter();
//writer.WriteToFile(a, output);
// Add beam element to the element and subdomains dictionary of the model
model.ElementsDictionary.Add(element.ID, element);
model.SubdomainsDictionary[1].Elements.Add(element);
iNode++;
}
// Add nodal load values at the top nodes of the model
model.Loads.Add(new Load()
{
Amount = nodalLoad, Node = model.NodesDictionary[monitorNode], DOF = StructuralDof.TranslationY
});
// Solver
var solverBuilder = new SkylineSolver.Builder();
ISolver solver = solverBuilder.BuildSolver(model);
// Problem type
var provider = new ProblemStructural(model, solver);
// Analyzers
int increments = 10;
var childAnalyzerBuilder = new LoadControlAnalyzer.Builder(model, solver, provider, increments);
childAnalyzerBuilder.ResidualTolerance = 1E-3;
//childAnalyzerBuilder.SubdomainUpdaters = new[] { new NonLinearSubdomainUpdater(model.SubdomainsDictionary[subdomainID]) }; // This is the default
LoadControlAnalyzer childAnalyzer = childAnalyzerBuilder.Build();
var parentAnalyzer = new StaticAnalyzer(model, solver, provider, childAnalyzer);
// Request output
childAnalyzer.LogFactories[1] = new LinearAnalyzerLogFactory(new int[] { 7 });
parentAnalyzer.Initialize();
parentAnalyzer.Solve();
// Check output
DOFSLog log = (DOFSLog)childAnalyzer.Logs[1][0]; //There is a list of logs for each subdomain and we want the first one
Assert.Equal(148.936792350562, log.DOFValues[7], 2);
}
private static void TestBeam3DElasticNonlinearNewmarkDynamicAnalysisExample()
{
double youngModulus = 21000.0;
double poissonRatio = 0.3;
double nodalLoad = 20000.0;
double area = 91.04;
double inertiaY = 2843.0;
double inertiaZ = 8091.0;
double torsionalInertia = 76.57;
double effectiveAreaY = 91.04;
double effectiveAreaZ = 91.04;
double density = 7.85;
int nNodes = 3;
int nElems = 2;
int monitorNode = 3;
// Create new 3D material
var material = new ElasticMaterial3D
{
YoungModulus = youngModulus,
PoissonRatio = poissonRatio,
};
// Node creation
IList <Node> nodes = new List <Node>();
Node node1 = new Node(id: 1, x: 0.0, y: 0.0, z: 0.0);
Node node2 = new Node(id: 2, x: 300.0, y: 0.0, z: 0.0);
Node node3 = new Node(id: 3, x: 600.0, y: 0.0, z: 0.0);
nodes.Add(node1);
nodes.Add(node2);
nodes.Add(node3);
// Model creation
Model model = new Model();
// Add a single subdomain to the model
int subdomainID = 0;
model.SubdomainsDictionary.Add(subdomainID, new Subdomain(subdomainID));
// Add nodes to the nodes dictonary of the model
for (int i = 0; i < nodes.Count; ++i)
{
model.NodesDictionary.Add(i + 1, nodes[i]);
}
// Constrain bottom nodes of the model
model.NodesDictionary[1].Constraints.Add(new Constraint {
DOF = StructuralDof.TranslationX
});
model.NodesDictionary[1].Constraints.Add(new Constraint {
DOF = StructuralDof.TranslationY
});
model.NodesDictionary[1].Constraints.Add(new Constraint {
DOF = StructuralDof.TranslationZ
});
model.NodesDictionary[1].Constraints.Add(new Constraint {
DOF = StructuralDof.RotationX
});
model.NodesDictionary[1].Constraints.Add(new Constraint {
DOF = StructuralDof.RotationY
});
model.NodesDictionary[1].Constraints.Add(new Constraint {
DOF = StructuralDof.RotationZ
});
// Generate elements of the structure
int iNode = 1;
for (int iElem = 0; iElem < nElems; iElem++)
{
// element nodes
IList <Node> elementNodes = new List <Node>();
elementNodes.Add(model.NodesDictionary[iNode]);
elementNodes.Add(model.NodesDictionary[iNode + 1]);
// Create new Beam3D section and element
var beamSection = new BeamSection3D(area, inertiaY, inertiaZ, torsionalInertia, effectiveAreaY, effectiveAreaZ);
var beam = new Beam3DCorotationalQuaternion(elementNodes, material, density, beamSection);
// Create elements
var element = new Element()
{
ID = iElem + 1,
ElementType = beam
};
// Add nodes to the created element
element.AddNode(model.NodesDictionary[iNode]);
element.AddNode(model.NodesDictionary[iNode + 1]);
var a = beam.StiffnessMatrix(element);
var b = beam.MassMatrix(element);
// Add beam element to the element and subdomains dictionary of the model
model.ElementsDictionary.Add(element.ID, element);
model.SubdomainsDictionary[subdomainID].Elements.Add(element);
iNode++;
}
// Add nodal load values at the top nodes of the model
model.Loads.Add(new Load()
{
Amount = nodalLoad, Node = model.NodesDictionary[monitorNode], DOF = StructuralDof.TranslationY
});
// Solver
var solverBuilder = new SkylineSolver.Builder();
ISolver solver = solverBuilder.BuildSolver(model);
// Problem type
var provider = new ProblemStructural(model, solver);
// Analyzers
int increments = 10;
var childAnalyzerBuilder = new LoadControlAnalyzer.Builder(model, solver, provider, increments);
childAnalyzerBuilder.MaxIterationsPerIncrement = 120;
childAnalyzerBuilder.NumIterationsForMatrixRebuild = 500;
//childAnalyzerBuilder.SubdomainUpdaters = new[] { new NonLinearSubdomainUpdater(model.SubdomainsDictionary[subdomainID]) }; // This is the default
LoadControlAnalyzer childAnalyzer = childAnalyzerBuilder.Build();
var parentAnalyzerBuilder = new NewmarkDynamicAnalyzer.Builder(model, solver, provider, childAnalyzer, 0.28, 3.36);
parentAnalyzerBuilder.SetNewmarkParametersForConstantAcceleration(); // Not necessary. This is the default
NewmarkDynamicAnalyzer parentAnalyzer = parentAnalyzerBuilder.Build();
parentAnalyzer.Initialize();
parentAnalyzer.Solve();
Assert.Equal(148.936792350562, solver.LinearSystems[subdomainID].Solution[7], 12);
}
public static void CNT_4_4_DisplacementControl()
{
double youngModulus = 16710.0;
double poissonRatio = 0.034;
double nodalDisplacement = 23.73;
double area = 5.594673861218848e-003;
double inertiaY = 2.490804749753243e-006;
double inertiaZ = 2.490804749753243e-006;
double torsionalInertia = inertiaY / 2.0;
double effectiveAreaY = area;
double effectiveAreaZ = area;
string workingDirectory = @"..\..\..\Resources\Beam3DInputFiles";
string geometryFileName = "CNT-4-4-L=25-Geometry.inp";
string connectivityFileName = "CNT-4-4-L=25-ConnMatr.inp";
int increments = 20;
int nNodes = File.ReadLines(workingDirectory + '\\' + geometryFileName).Count();
int nElems = File.ReadLines(workingDirectory + '\\' + connectivityFileName).Count();
int monitorNode_1 = nNodes - 1;
int monitorNode_2 = nNodes;
// Create new 3D material
var material_1 = new ElasticMaterial3D
{
YoungModulus = youngModulus,
PoissonRatio = poissonRatio,
};
var material_2 = new ElasticMaterial3D
{
YoungModulus = 100.0 * youngModulus,
PoissonRatio = poissonRatio,
};
// Model creation
Model model = new Model();
// Subdomains
model.SubdomainsDictionary.Add(1, new Subdomain(1));
// Node creation
IList <Node> nodes = new List <Node>();
using (TextReader reader = File.OpenText(workingDirectory + '\\' + geometryFileName))
{
for (int i = 0; i < nNodes; i++)
{
string text = reader.ReadLine();
string[] bits = text.Split(',');
int nodeID = int.Parse(bits[0]);
double nodeX = double.Parse(bits[1]);
double nodeY = double.Parse(bits[2]);
double nodeZ = double.Parse(bits[3]);
nodes.Add(new Node(id: nodeID, x: nodeX, y: nodeY, z: nodeZ));
model.NodesDictionary.Add(nodeID, nodes[i]);
}
}
// Constraints
IList <Node> constraintsNodes = new List <Node>();
constraintsNodes.Add(nodes[1 - 1]);
constraintsNodes.Add(nodes[2 - 1]);
constraintsNodes.Add(nodes[617 - 1]);
constraintsNodes.Add(nodes[618 - 1]);
constraintsNodes.Add(nodes[1029 - 1]);
constraintsNodes.Add(nodes[1030 - 1]);
constraintsNodes.Add(nodes[1441 - 1]);
constraintsNodes.Add(nodes[1442 - 1]);
constraintsNodes.Add(nodes[1649 - 1]);
for (int i = 0; i < 9; i++)
{
int iNode = constraintsNodes[i].ID;
model.NodesDictionary[iNode].Constraints.Add(new Constraint {
DOF = StructuralDof.TranslationX
});
model.NodesDictionary[iNode].Constraints.Add(new Constraint {
DOF = StructuralDof.TranslationY
});
model.NodesDictionary[iNode].Constraints.Add(new Constraint {
DOF = StructuralDof.TranslationZ
});
model.NodesDictionary[iNode].Constraints.Add(new Constraint {
DOF = StructuralDof.RotationX
});
model.NodesDictionary[iNode].Constraints.Add(new Constraint {
DOF = StructuralDof.RotationY
});
model.NodesDictionary[iNode].Constraints.Add(new Constraint {
DOF = StructuralDof.RotationZ
});
}
// Applied displacement
model.NodesDictionary[monitorNode_2].Constraints.Add(new Constraint {
DOF = StructuralDof.TranslationY, Amount = nodalDisplacement
});
// Create new Beam3D section and element
var beamSection = new BeamSection3D(area, inertiaY, inertiaZ, torsionalInertia, effectiveAreaY, effectiveAreaZ);
// Generate elements
using (TextReader reader = File.OpenText(workingDirectory + '\\' + connectivityFileName))
{
for (int i = 0; i < (nElems - 16); i++)
{
string text = reader.ReadLine();
string[] bits = text.Split(',');
int elementID = int.Parse(bits[0]);
int node1 = int.Parse(bits[1]);
int node2 = int.Parse(bits[2]);
// element nodes
IList <Node> elementNodes = new List <Node>();
elementNodes.Add(model.NodesDictionary[node1]);
elementNodes.Add(model.NodesDictionary[node2]);
// create element
var beam_1 = new Beam3DCorotationalQuaternion(elementNodes, material_1, 7.85, beamSection);
var element = new Element {
ID = elementID, ElementType = beam_1
};
// Add nodes to the created element
element.AddNode(model.NodesDictionary[node1]);
element.AddNode(model.NodesDictionary[node2]);
// beam stiffness matrix
var a = beam_1.StiffnessMatrix(element);
// Add beam element to the element and subdomains dictionary of the model
model.ElementsDictionary.Add(element.ID, element);
model.SubdomainsDictionary[1].Elements.Add(element);
}
for (int i = (nElems - 16); i < nElems; i++)
{
string text = reader.ReadLine();
string[] bits = text.Split(',');
int elementID = int.Parse(bits[0]);
int node1 = int.Parse(bits[1]);
int node2 = int.Parse(bits[2]);
// element nodes
IList <Node> elementNodes = new List <Node>();
elementNodes.Add(model.NodesDictionary[node1]);
elementNodes.Add(model.NodesDictionary[node2]);
// create element
var beam_2 = new Beam3DCorotationalQuaternion(elementNodes, material_2, 7.85, beamSection);
var element = new Element {
ID = elementID, ElementType = beam_2
};
// Add nodes to the created element
element.AddNode(model.NodesDictionary[node1]);
element.AddNode(model.NodesDictionary[node2]);
// beam stiffness matrix
var a = beam_2.StiffnessMatrix(element);
// Add beam element to the element and subdomains dictionary of the model
model.ElementsDictionary.Add(element.ID, element);
model.SubdomainsDictionary[1].Elements.Add(element);
}
}
// Choose linear equation system solver
var solverBuilder = new SkylineSolver.Builder();
ISolver solver = solverBuilder.BuildSolver(model);
// Choose the provider of the problem -> here a structural problem
var provider = new ProblemStructural(model, solver);
// Choose child analyzer -> Child: NewtonRaphsonNonLinearAnalyzer
var subdomainUpdaters = new[] { new NonLinearSubdomainUpdater(model.SubdomainsDictionary[1]) };
var childAnalyzerBuilder = new DisplacementControlAnalyzer.Builder(model, solver, provider, increments);
var childAnalyzer = childAnalyzerBuilder.Build();
// Choose parent analyzer -> Parent: Static
var parentAnalyzer = new StaticAnalyzer(model, solver, provider, childAnalyzer);
// Request output
//int monDOF = linearSystems[1].Solution.Length - 5; //(6 * monitorNode_2 - 4);
int monDOF = 9841;
childAnalyzer.LogFactories[1] = new LinearAnalyzerLogFactory(new int[] { monDOF });
// Run the analysis
parentAnalyzer.Initialize();
parentAnalyzer.Solve();
// Check output
DOFSLog log = (DOFSLog)childAnalyzer.Logs[1][0]; //There is a list of logs for each subdomain and we want the first one
Console.WriteLine($"dof = {monDOF}, u = {log.DOFValues[monDOF]}");
//Assert.Equal(-21.2328445476855, log.DOFValues[monDOF], 8);
}
public static void EBEModelBuilder(Model model)
{
// define mechanical properties
double youngModulus = 1.0;
double shearModulus = 1.0;
double poissonRatio = 0.034; //0.30; // (youngModulus / (2 * shearModulus)) - 1;
double area = 694.77; //CNT(8,8)-LinearEBE-TBT-L=10nm
//1218.11; //CNT(8,8)-LinearEBE-EBT-L=10nm
//694.77; //CNT(8,8)-LinearEBE-TBT-L=10nm
double inertiaY = 100.18; //CNT(8,8)-LinearEBE-TBT-L=10nm
//177.51; //CNT(8,8)-LinearEBE-EBT-L=10nm
//100.18; //CNT(8,8)-LinearEBE-TBT-L=10nm
double inertiaZ = 100.18; //CNT(8,8)-LinearEBE-TBT-L=10nm
//177.51; //CNT(8,8)-LinearEBE-EBT-L=10nm
//100.18; //CNT(8,8)-LinearEBE-TBT-L=10nm
double torsionalInertia = 68.77; //CNT(8,8)-LinearEBE-TBT-L=10nm
//168.25; //CNT(8,8)-LinearEBE-EBT-L=10nm
//68.77; //CNT(8,8)-LinearEBE-TBT-L=10nm
double effectiveAreaY = area;
double effectiveAreaZ = area;
string workingDirectory = @"E:\GEORGE_DATA\DESKTOP\input files"; //@"D:\George\Desktop\input files"; //
string CNTgeometryFileName = "EmbeddedCNT-8-8-L=100-h=3-k=1-EBE-L=10-NumberOfCNTs=1-Geometry_beam.inp";
string CNTconnectivityFileName = "EmbeddedCNT-8-8-L=100-h=3-k=1-EBE-L=10-NumberOfCNTs=1-ConnMatr_beam.inp";
int CNTNodes = File.ReadLines(workingDirectory + '\\' + CNTgeometryFileName).Count();
int CNTElems = File.ReadLines(workingDirectory + '\\' + CNTconnectivityFileName).Count();
// Geometry
using (TextReader reader = File.OpenText(workingDirectory + '\\' + CNTgeometryFileName))
{
for (int i = 0; i < CNTNodes; i++)
{
string text = reader.ReadLine();
string[] bits = text.Split(',');
int nodeID = int.Parse(bits[0]) + 44; // matrixNodes
double nodeX = double.Parse(bits[1]);
double nodeY = double.Parse(bits[2]);
double nodeZ = double.Parse(bits[3]);
model.NodesDictionary.Add(nodeID, new Node(id: nodeID, x: nodeX, y: nodeY, z: nodeZ));
}
}
// Create new 3D material
var beamMaterial = new ElasticMaterial3D
{
YoungModulus = youngModulus,
PoissonRatio = poissonRatio,
};
// Create new Beam3D section and element
var beamSection = new BeamSection3D(area, inertiaY, inertiaZ, torsionalInertia, effectiveAreaY, effectiveAreaZ);
// element nodes
using (TextReader reader = File.OpenText(workingDirectory + '\\' + CNTconnectivityFileName))
{
for (int i = 0; i < CNTElems; i++)
{
string text = reader.ReadLine();
string[] bits = text.Split(',');
int elementID = int.Parse(bits[0]) + 10; // matrixElements
int node1 = int.Parse(bits[1]) + 44; // matrixNodes
int node2 = int.Parse(bits[2]) + 44; // matrixNodes
// element nodes
var elementNodes = new List <Node>();
elementNodes.Add(model.NodesDictionary[node1]);
elementNodes.Add(model.NodesDictionary[node2]);
// create element
var beam_1 = new Beam3DCorotationalQuaternion(elementNodes, beamMaterial, 7.85, beamSection);
var beamElement = new Element {
ID = elementID, ElementType = beam_1
};
// Add nodes to the created element
beamElement.AddNode(model.NodesDictionary[node1]);
beamElement.AddNode(model.NodesDictionary[node2]);
// beam stiffness matrix
// var a = beam_1.StiffnessMatrix(beamElement);
// Add beam element to the element and subdomains dictionary of the model
model.ElementsDictionary.Add(beamElement.ID, beamElement);
//model.SubdomainsDictionary[0].ElementsDictionary.Add(beamElement.ID, beamElement);
model.SubdomainsDictionary[0].Elements.Add(beamElement);
}
}
}
public static void EmbeddedElementsBuilder(Model model)
{
// define mechanical properties
double youngModulus = 16710.0; // 5490; //
double shearModulus = 8080.0; // 871; //
double poissonRatio = 2.15; // 0.034; //(youngModulus / (2 * shearModulus)) - 1;
double area = 5.594673861218848d - 003; // CNT(20,20)-LinearEBE-TBT-L = 10nm
double inertiaY = 2.490804749753243D - 006; //1058.55;
double inertiaZ = 2.490804749753243D - 006; // 1058.55;
double torsionalInertia = 4.981609499506486D - 006; //496.38;
double effectiveAreaY = area;
double effectiveAreaZ = area;
string workingDirectory = @"E:\GEORGE_DATA\DESKTOP\input files"; //"..\..\..\Resources\Beam3DInputFiles";
string CNTgeometryFileName = "CNT-8-8-L=100-h=3-Geometry.inp";
//"CNT-8-8-L=100-Geometry-2.inp";
//"EmbeddedCNT-8-8-L=100-h=0-k=1-EBE-L=1-NumberOfCNTs=1-Geometry_beam.inp";
//"CNT-8-8-L=100-h=3-Geometry.inp";
string CNTconnectivityFileName = "CNT-8-8-L=100-h=3-ConnMatr.inp";
//"CNT-8-8-L=100-ConnMatr-2.inp";
//"EmbeddedCNT-8-8-L=100-h=0-k=1-EBE-L=1-NumberOfCNTs=1-ConnMatr_beam.inp";
//"CNT-8-8-L=100-h=3-ConnMatr.inp";
int CNTNodes = File.ReadLines(workingDirectory + '\\' + CNTgeometryFileName).Count();
int CNTElems = File.ReadLines(workingDirectory + '\\' + CNTconnectivityFileName).Count();
// Geometry
using (TextReader reader = File.OpenText(workingDirectory + '\\' + CNTgeometryFileName))
{
for (int i = 0; i < CNTNodes; i++)
{
string text = reader.ReadLine();
string[] bits = text.Split(',');
int nodeID = int.Parse(bits[0]) + 10100; // matrixNodes
double nodeX = double.Parse(bits[1]);
double nodeY = double.Parse(bits[2]);
double nodeZ = double.Parse(bits[3]);
model.NodesDictionary.Add(nodeID, new Node(id: nodeID, x: nodeX, y: nodeY, z: nodeZ));
}
}
// Create new 3D material
var beamMaterial = new ElasticMaterial3D
{
YoungModulus = youngModulus,
PoissonRatio = poissonRatio,
};
// Create new Beam3D section and element
var beamSection = new BeamSection3D(area, inertiaY, inertiaZ, torsionalInertia, effectiveAreaY, effectiveAreaZ);
// element nodes
using (TextReader reader = File.OpenText(workingDirectory + '\\' + CNTconnectivityFileName))
{
for (int i = 0; i < CNTElems; i++)
{
string text = reader.ReadLine();
string[] bits = text.Split(',');
int elementID = int.Parse(bits[0]) + 8100; // matrixElements
int node1 = int.Parse(bits[1]) + 10100; // matrixNodes
int node2 = int.Parse(bits[2]) + 10100; // matrixNodes
// element nodes
var elementNodes = new List <Node>();
elementNodes.Add(model.NodesDictionary[node1]);
elementNodes.Add(model.NodesDictionary[node2]);
// create element
var beam_1 = new Beam3DCorotationalQuaternion(elementNodes, beamMaterial, 7.85, beamSection);
var beamElement = new Element {
ID = elementID, ElementType = beam_1
};
// Add nodes to the created element
beamElement.AddNode(model.NodesDictionary[node1]);
beamElement.AddNode(model.NodesDictionary[node2]);
// beam stiffness matrix
// var a = beam_1.StiffnessMatrix(beamElement);
// Add beam element to the element and subdomains dictionary of the model
model.ElementsDictionary.Add(beamElement.ID, beamElement);
//model.SubdomainsDictionary[0].ElementsDictionary.Add(beamElement.ID, beamElement);
model.SubdomainsDictionary[0].Elements.Add(beamElement);
}
}
}