public static void Test3()
{
var model = new BriefFiniteElementNet.Model();
var p = new Point[20];
var ns = new Node[20];
p[0] = new Point(x: 0, y: 1, z: 0);
p[1] = new Point(x: 0, y: 0, z: 0);
p[2] = new Point(x: 0.20, y: 0, z: 0);
p[3] = new Point(x: 0.20, y: 0, z: 0.20);
p[4] = new Point(x: 0.20, y: 1, z: 0);
p[5] = new Point(x: 0.20, y: 1, z: 0.20);
p[6] = new Point(x: 0, y: 1, z: 0.20);
p[7] = new Point(x: 0, y: 0, z: 0.20);
p[8] = new Point(x: 0, y: 0.50, z: 0);
p[9] = new Point(x: 0.20, y: 0.50, z: 0);
p[10] = new Point(x: 0, y: 0.50, z: 0.20);
p[11] = new Point(x: 0.20, y: 0.50, z: 0.20);
p[12] = new Point(x: 0.20, y: 0.25, z: 0.20);
p[13] = new Point(x: 0, y: 0.25, z: 0.20);
p[14] = new Point(x: 0, y: 0.25, z: 0);
p[15] = new Point(x: 0.20, y: 0.25, z: 0);
p[16] = new Point(x: 0.20, y: 0.75, z: 0.20);
p[17] = new Point(x: 0.20, y: 0.75, z: 0);
p[18] = new Point(x: 0, y: 0.75, z: 0);
p[19] = new Point(x: 0, y: 0.75, z: 0.20);
for (var i = 0; i < 20; i++)
{
model.Nodes.Add(ns[i] = new Node(p[i]));
ns[i].Label = "n" + i.ToString(CultureInfo.CurrentCulture);
ns[i].Constraints = Constraints.RotationFixed;
}
var mesh = new int[24][];
mesh[0] = new int[] { 0, 4, 16, 17 };
mesh[1] = new int[] { 8, 15, 12, 14 };
mesh[2] = new int[] { 8, 16, 17, 18 };
mesh[3] = new int[] { 10, 8, 11, 12 };
mesh[4] = new int[] { 5, 19, 0, 16 };
mesh[5] = new int[] { 1, 15, 14, 12 };
mesh[6] = new int[] { 8, 10, 11, 16 };
mesh[7] = new int[] { 3, 13, 1, 7 };
mesh[8] = new int[] { 3, 13, 12, 1 };
mesh[9] = new int[] { 8, 12, 13, 14 };
mesh[10] = new int[] { 1, 15, 12, 2 };
mesh[11] = new int[] { 9, 8, 11, 16 };
mesh[12] = new int[] { 10, 8, 12, 13 };
mesh[13] = new int[] { 5, 0, 4, 16 };
mesh[14] = new int[] { 5, 19, 6, 0 };
mesh[15] = new int[] { 8, 19, 16, 18 };
mesh[16] = new int[] { 8, 19, 10, 16 };
mesh[17] = new int[] { 0, 19, 18, 16 };
mesh[18] = new int[] { 1, 3, 2, 12 };
mesh[19] = new int[] { 8, 15, 9, 12 };
mesh[20] = new int[] { 13, 12, 1, 14 };
mesh[21] = new int[] { 8, 9, 11, 12 };
mesh[22] = new int[] { 9, 8, 16, 17 };
mesh[23] = new int[] { 16, 0, 17, 18 };
foreach (var elm in mesh)
{
var felm = new Tetrahedral();
felm.Nodes[0] = ns[elm[0]];
felm.Nodes[1] = ns[elm[1]];
felm.Nodes[2] = ns[elm[2]];
felm.Nodes[3] = ns[elm[3]];
felm.E = 210e9;
felm.Nu = 0.33;
model.Elements.Add(felm);
}
var relm = new BriefFiniteElementNet.MpcElements.RigidElement_MPC();
relm.Nodes = new NodeList()
{
ns[0], ns[4], ns[5], ns[6]
};
relm.UseForAllLoads = true;
//model.MpcElements.Add(relm);
ns[1].Constraints = ns[2].Constraints = ns[3].Constraints = ns[7].Constraints = Constraints.Fixed;
var load = new BriefFiniteElementNet.NodalLoad();
var frc = new Force();
frc.Fz = 1000;// 1kN force in Z direction
load.Force = frc;
ns[5].Loads.Add(load);
ns[6].Loads.Add(load);
model.Solve_MPC();
var d5 = ns[5].GetNodalDisplacement();
var d6 = ns[6].GetNodalDisplacement();
Console.WriteLine("Nodal displacement in Z direction is {0} meters (thus {1} mm)", d5.DZ, d5.DZ * 1000);
Console.WriteLine("Nodal displacement in Z direction is {0} meters (thus {1} mm)", d6.DZ, d6.DZ * 1000);
var tetra = model.Elements[0] as Tetrahedral;
var stress = tetra.GetInternalForce(LoadCombination.DefaultLoadCombination);
}
/// <summary>
/// Method that reads an Abaqus input file and returns a BFE model with the same nodes and elements
/// </summary>
/// <param name="path">Path to an input file</param>
/// <returns>A BFE model</returns>
public static Model AbaqusInputToBFE(string pathToInputFile)
{
var buf = new Model();
//splitting char
char delimiter = ',';
Node node;
TetrahedronElement element;
//list for the node- and elementsets
List <NodeSet> nodeSets = new List <NodeSet>();
List <ElementSet> elementSets = new List <ElementSet>();
using (StreamReader sr = File.OpenText(pathToInputFile))
{
string[] split;
selectedInputVariable selectedVar = selectedInputVariable.Nodes;
string input = sr.ReadLine();
while (input != null)
{
split = input.Split(delimiter);
if (split[0].Contains('*'))
{
switch (split[0])
{
case "*Node":
selectedVar = selectedInputVariable.Nodes;
break;
case "*Element":
selectedVar = selectedInputVariable.Elements;
break;
case "*Nset":
selectedVar = selectedInputVariable.NodeSet;
nodeSets.Add(new NodeSet()
{
Name = split[1].Replace("nset=", "")
});
break;
case "*Elset":
selectedVar = selectedInputVariable.ElementSet;
elementSets.Add(new ElementSet()
{
Name = split[1].Replace("elset=", "")
});
break;
case "*Cload":
selectedVar = selectedInputVariable.CLoad;
break;
case "*Boundary":
selectedVar = selectedInputVariable.BC;
break;
default:
selectedVar = selectedInputVariable.Other;
break;
}
}
else
{
switch (selectedVar)
{
case selectedInputVariable.Nodes:
{
node = ReadNode(input, delimiter);
if (node != null)
{
//tetrahedron element - > fix rotation
node.Constraints = Constraints.RotationFixed;
buf.Nodes.Add(node);
}
break;
}
case selectedInputVariable.Elements:
{
element = ReadTetraElement(input, delimiter, buf.Nodes);
if (element != null)
{
element.Material = UniformIsotropicMaterial.CreateFromYoungPoisson(210e9, 0.25);
element.FixNodeOrder();
buf.Elements.Add(element);
}
break;
}
case selectedInputVariable.NodeSet:
{
for (int i = 0; i < split.Count(); i++)
{
nodeSets[nodeSets.Count - 1].Nodes.Add(Convert.ToInt32(split[i]));
}
break;
}
case selectedInputVariable.ElementSet:
{
for (int i = 0; i < split.Count(); i++)
{
elementSets[elementSets.Count - 1].Elements.Add(Convert.ToInt32(split[i]));
}
break;
}
case selectedInputVariable.CLoad:
{
NodeSet set = nodeSets.Where(x => x.Name.Replace(" ", "") == split[0].Replace(" ", "")).FirstOrDefault();
if (set != null)
{
//determine the magnitude of the load
var load = new BriefFiniteElementNet.NodalLoad();
var frc = new Force();
if (Convert.ToInt32(split[1]) == 1)
{
frc.Fx = Convert.ToDouble(split[2]);
load.Force = frc;
}
else if (Convert.ToInt32(split[1]) == 2)
{
frc.Fy = Convert.ToDouble(split[2]);
load.Force = frc;
}
else if (Convert.ToInt32(split[1]) == 3)
{
frc.Fz = Convert.ToDouble(split[2]);
load.Force = frc;
}
//add the load to the nodes
foreach (var nodeLabel in set.Nodes)
{
buf.Nodes[nodeLabel - 1].Loads.Add(load);
}
}
break;
}
case selectedInputVariable.BC:
{
NodeSet set = nodeSets.Where(x => x.Name.Replace(" ", "") == split[0].Replace(" ", "")).FirstOrDefault();
if (set != null)
{
//add the load to the nodes
foreach (var nodeLabel in set.Nodes)
{
buf.Nodes[nodeLabel - 1].Constraints = Constraints.Fixed;
}
}
break;
}
default:
break;
}
}
input = sr.ReadLine();
}
}
return(buf);
}
