Neo Hookean constitutive law (incompressible version) No argument for Poisson ratio here - it must be equal to 0.5. More...

#include <constitutive_laws.h>

Inheritance diagram for oomph::IncompressibleNeoHookean:

Public Member Functions
	IncompressibleNeoHookean (double *e_pt)
	The constructor takes Young's modulus as an argument.

	IncompressibleNeoHookean ()
	Argument-free constructor.

virtual	~IncompressibleNeoHookean ()
	Virtual destructor.

double	W (const DenseMatrix< double > &gamma)
	Return the strain energy in terms of strain tensor.

double	W (const Vector< double > &I)
	Return the strain energy in terms of the strain invariants.

void	derivatives (Vector< double > &I, Vector< double > &dWdI)
	Return the derivatives of the strain energy function with respect to the strain invariants.

bool	requires_incompressibility_constraint ()
	Pure virtual function in which the user must declare if the constitutive equation requires an incompressible formulation in which the volume constraint is enforced explicitly. Used as a sanity check in PARANOID mode. True.

Public Member Functions inherited from oomph::StrainEnergyFunction
	StrainEnergyFunction ()
	Constructor takes no arguments.

virtual	~StrainEnergyFunction ()
	Empty virtual destructor.

virtual void	derivative (const DenseMatrix< double > &gamma, DenseMatrix< double > &dWdgamma)
	Return the derivatives of the strain energy function with respect to the components of the strain tensor (default is to use finite differences).

Private Attributes
double *	E_pt
	Young's modulus.

bool	Must_delete_e
	Boolean indicating if Young's modulus must be deleted in destructor.

Detailed Description

Neo Hookean constitutive law (incompressible version) No argument for Poisson ratio here - it must be equal to 0.5.

Definition at line 396 of file constitutive_laws.h.

Constructor & Destructor Documentation

◆ IncompressibleNeoHookean() [1/2]

oomph::IncompressibleNeoHookean::IncompressibleNeoHookean ( double * e_pt )

inline

The constructor takes Young's modulus as an argument.

Definition at line 400 of file constitutive_laws.h.

◆ IncompressibleNeoHookean() [2/2]

oomph::IncompressibleNeoHookean::IncompressibleNeoHookean ( )

inline

Argument-free constructor.

Definition at line 406 of file constitutive_laws.h.

◆ ~IncompressibleNeoHookean()

virtual oomph::IncompressibleNeoHookean::~IncompressibleNeoHookean ( )

inlinevirtual

Virtual destructor.

Definition at line 412 of file constitutive_laws.h.

References E_pt, and Must_delete_e.

Member Function Documentation

◆ derivatives()

void oomph::IncompressibleNeoHookean::derivatives	(	Vector< double > &	I,
		Vector< double > &	dWdI
	)

inlinevirtual

Return the derivatives of the strain energy function with respect to the strain invariants.

Reimplemented from oomph::StrainEnergyFunction.

Definition at line 433 of file constitutive_laws.h.

References e, and E_pt.

◆ requires_incompressibility_constraint()

bool oomph::IncompressibleNeoHookean::requires_incompressibility_constraint ( )

inlinevirtual

Pure virtual function in which the user must declare if the constitutive equation requires an incompressible formulation in which the volume constraint is enforced explicitly. Used as a sanity check in PARANOID mode. True.

Implements oomph::StrainEnergyFunction.

Definition at line 446 of file constitutive_laws.h.