/usr/src/RPM/BUILD/trilinos-11.12.1/packages/intrepid/src/Shared/MiniTensor/Intrepid_MiniTensor_Mechanics.i.h

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#if !defined(Intrepid_MiniTensor_Mechanics_i_h)
#define Intrepid_MiniTensor_Mechanics_i_h

namespace Intrepid {

//
// R^N volumetric part of 2nd-order tensor
// \return \f$ \frac{1}{N} \mathrm{tr}\:(A) I \f$
//
template<typename T, Index N>
inline
Tensor<T, N>
vol(Tensor<T, N> const & A)
{
  Index const
  dimension = A.get_dimension();

  T const
  theta = (1.0/dimension) * trace(A);

  return theta * eye<T, N>(dimension);
}

//
// R^N deviatoric part of 2nd-order tensor
// \return \f$ A - vol(A) \f$
//
template<typename T, Index N>
inline
Tensor<T, N>
dev(Tensor<T, N> const & A)
{
  return A - vol(A);
}

} // namespace Intrepid

#endif // Intrepid_MiniTensor_Mechanics_i_h