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/*=========================================================================
*
* 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.
*
*=========================================================================*/
#ifndef itkFEMElement2DC1Beam_h
#define itkFEMElement2DC1Beam_h
#include "itkFEMElementStd.h"
#include "itkFEMLoadElementBase.h"
#include "itkFEMMaterialLinearElasticity.h"
#include "ITKFEMExport.h"
namespace itk
{
namespace fem
{
/**
* \class Element2DC1Beam
* \brief 1D Beam (spring that also bends) finite element in 2D space.
*
* The Displacements at each node are modeled with two translational,
* and one rotational, degree of freedom.
* \ingroup ITKFEM
*/
class ITKFEM_EXPORT Element2DC1Beam : public ElementStd<2, 2>
{
public:
/** Standard class type aliases. */
using Self = Element2DC1Beam;
using TemplatedParentClass = ElementStd<2, 2>;
using Superclass = TemplatedParentClass;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** Method for creation through the object factory. */
itkSimpleNewMacro(Self);
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(Element2DC1Beam);
/** CreateAnother method will clone the existing instance of this type,
* including its internal member variables. */
itk::LightObject::Pointer
CreateAnother() const override;
/**
* Default constructor only clears the internal storage
*/
Element2DC1Beam();
/**
* Construct an element by specifying two nodes and material
*/
Element2DC1Beam(Node::ConstPointer n1_, Node::ConstPointer n2_, Material::ConstPointer mat_);
// ////////////////////////////////////////////////////////////////////////
/*
* Methods related to the physics of the problem.
*/
/** Get the Stiffness matrix */
void
GetStiffnessMatrix(MatrixType & Ke) const override;
/** Get the Mass matrix */
void
GetMassMatrix(MatrixType & Me) const override;
/** Get the Strain Displacement matrix */
void
GetStrainDisplacementMatrix(MatrixType &, const MatrixType &) const override
{}
/** Get the Material matrix */
void
GetMaterialMatrix(MatrixType &) const override
{}
// ////////////////////////////////////////////////////////////////////////
/**
* Methods related to numeric integration
*/
enum
{
DefaultIntegrationOrder = 1
};
/** Get the Integration point and weight */
void
GetIntegrationPointAndWeight(unsigned int i, VectorType & pt, Float & w, unsigned int order = 0) const override;
unsigned int
GetNumberOfIntegrationPoints(unsigned int order) const override;
// ////////////////////////////////////////////////////////////////////////
/**
* Methods related to the geometry of an element
*/
/** Return the shape functions used to interpolate across the element */
VectorType
ShapeFunctions(const VectorType & pt) const override;
/** Return the shape functions derivatives in the shapeD matrix */
void
ShapeFunctionDerivatives(const VectorType & pt, MatrixType & shapeD) const override;
/** Convert from global to local coordinates */
bool
GetLocalFromGlobalCoordinates(const VectorType &, VectorType &) const override
{
return false;
}
/** Return the determinate of the Jacobian */
Float
JacobianDeterminant(const VectorType & pt, const MatrixType * pJ) const override;
/** Get the degrees of freedom for each node */
unsigned int
GetNumberOfDegreesOfFreedomPerNode() const override
{
return 3;
}
/**
* Get/Set the material properties for the element
*/
Material::ConstPointer
GetMaterial() const override
{
return dynamic_cast<const Material *>(m_mat);
}
void
SetMaterial(Material::ConstPointer mat_) override
{
m_mat = dynamic_cast<const MaterialLinearElasticity *>(mat_.GetPointer());
}
/** No edges to populate in this class */
void
PopulateEdgeIds() override
{ /* empty */
}
protected:
void
PrintSelf(std::ostream & os, Indent indent) const override;
private:
/**
* Pointer to material properties of the element
*/
const MaterialLinearElasticity * m_mat{ nullptr };
};
} // end namespace fem
} // end namespace itk
#endif // itkFEMElement2DC1Beam_h
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