SimpleContactProblem::OpGapConstraintAugmentedOverLambda Struct Reference

LHS-operator for the simple contact element. More...

#include <users_modules/mortar_contact/src/SimpleContact.hpp>

Inheritance diagram for SimpleContactProblem::OpGapConstraintAugmentedOverLambda:

Collaboration diagram for SimpleContactProblem::OpGapConstraintAugmentedOverLambda:

Public Member Functions
	OpGapConstraintAugmentedOverLambda (const string lagrange_field_name, boost::shared_ptr< CommonDataSimpleContact > common_data_contact, const double cn)
MoFEMErrorCode	doWork (int row_side, int col_side, EntityType row_type, EntityType col_type, EntData &row_data, EntData &col_data)
	Integrates the conditions that fulfil KKT conditions at slave face gauss points and assembles components to LHS global matrix. More...

Private Attributes
boost::shared_ptr< CommonDataSimpleContact >	commonDataSimpleContact
const double	cN
MatrixDouble	NN

Detailed Description

LHS-operator for the simple contact element.

Integrates variation of the conditions that fulfil KKT conditions with respect to Lagrange multipliers on slave side and assembles components to LHS global matrix.

Definition at line 1987 of file SimpleContact.hpp.

Constructor & Destructor Documentation

OpGapConstraintAugmentedOverLambda()

SimpleContactProblem::OpGapConstraintAugmentedOverLambda::OpGapConstraintAugmentedOverLambda ( const string  lagrange_field_name, boost::shared_ptr< CommonDataSimpleContact >  common_data_contact, const double  cn  )

inline

Definition at line 1989 of file SimpleContact.hpp.

        : ContactOp(lagrange_field_name, UserDataOperator::OPROWCOL,
                    ContactOp::FACESLAVESLAVE),
          commonDataSimpleContact(common_data_contact), cN(cn) {
      sYmm = false; // This will make sure to loop over all entities (e.g.
                    // for order=2 it will make doWork to loop 16 time)
    }

Member Function Documentation

doWork()

MoFEMErrorCode SimpleContactProblem::OpGapConstraintAugmentedOverLambda::doWork	(	int	row_side,
		int	col_side,
		EntityType	row_type,
		EntityType	col_type,
		EntData &	row_data,
		EntData &	col_data
	)

Integrates the conditions that fulfil KKT conditions at slave face gauss points and assembles components to LHS global matrix.

Integrates variation of the expresion that fulfils KKT conditions with respect to Lagrange multipliers and assembles components to LHS global matrix.

\[ {\text D}{\overline C(\lambda, \mathbf{x}^{(1)}, \delta \lambda)}[\Delta \lambda] = \left\{ \begin{array}{ll} 0 & \lambda + c_{\text n} g_{\textrm{n}}\leq 0 \\ \int_{{\gamma}^{(1)}_{\text c}} -\dfrac{1}{c_{\text n}} \Delta \lambda \delta{\lambda}\,\,{ {\text d} {\gamma}} & \lambda + c_{\text n} g_{\textrm{n}}> 0 \\ \end{array} \right. \]

where \({\gamma}^{(1)}_{\text c}\) is the surface integration domain of the slave surface, \( \lambda\) is the Lagrange multiplier, \(\mathbf{x}^{(i)}\) are the coordinates of the overlapping gauss points at slave and master triangles for \(i = 1\) and \(i = 2\), respectively. Furthermore, \( c_{\text n}\) works as an augmentation parameter and affects convergence, and \( g_{\textrm{n}}\) is the gap function evaluated at the slave triangle gauss points as:

\[ g_{\textrm{n}} = - \mathbf{n}(\mathbf{x}^{(1)}) \cdot \left( \mathbf{x}^{(1)} - \mathbf{x}^{(2)} \right) \]

Definition at line 953 of file SimpleContact.cpp.

                                          {
  MoFEMFunctionBegin;
 
  const int nb_row = row_data.getIndices().size();
  const int nb_col = col_data.getIndices().size();
 
  if (nb_row && nb_col) {
    const int nb_gauss_pts = row_data.getN().size1();
    const double area_slave =
        commonDataSimpleContact->areaSlave; // same area in master and slave
 
    NN.resize(nb_row, nb_col, false);
    NN.clear();
 
    auto t_lagrange_slave =
        getFTensor0FromVec(*commonDataSimpleContact->lagMultAtGaussPtsPtr);
    auto t_w = getFTensor0IntegrationWeightSlave();
 
    auto t_aug_lambda_ptr =
        getFTensor0FromVec(*commonDataSimpleContact->augmentedLambdasPtr);
 
    for (int gg = 0; gg != nb_gauss_pts; ++gg) {
 
      if (t_aug_lambda_ptr <= 0) {
        ++t_w;
        ++t_aug_lambda_ptr;
        ++t_lagrange_slave;
        continue;
      }
 
      const double val_s = -t_w * area_slave / cN;
 
      FTensor::Tensor0<FTensor::PackPtr<double *, 1>> t_mat(
          &*NN.data().begin());
 
      auto t_base_lambda_row = row_data.getFTensor0N(gg, 0);
      for (int bbr = 0; bbr != nb_row; ++bbr) {
        auto t_base_lambda_col = col_data.getFTensor0N(gg, 0);
        const double s = val_s * t_base_lambda_row;
        for (int bbc = 0; bbc != nb_col; ++bbc) {
 
          t_mat += s * t_base_lambda_col;
 
          ++t_mat;
          ++t_base_lambda_col; // update cols
        }
        ++t_base_lambda_row; // update rows
      }
 
      ++t_lagrange_slave;
      ++t_w;
      ++t_aug_lambda_ptr;
    }
    CHKERR MatSetValues(getSNESB(), row_data, col_data, &*NN.data().begin(),
                        ADD_VALUES);
  }
 
  MoFEMFunctionReturn(0);
}

Member Data Documentation

cN

const double SimpleContactProblem::OpGapConstraintAugmentedOverLambda::cN

private

Definition at line 2039 of file SimpleContact.hpp.

commonDataSimpleContact

boost::shared_ptr<CommonDataSimpleContact> SimpleContactProblem::OpGapConstraintAugmentedOverLambda::commonDataSimpleContact

private

Definition at line 2038 of file SimpleContact.hpp.

NN

MatrixDouble SimpleContactProblem::OpGapConstraintAugmentedOverLambda::NN

private

Definition at line 2040 of file SimpleContact.hpp.

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The documentation for this struct was generated from the following files:

• users_modules/mortar_contact/src/SimpleContact.hpp
• users_modules/mortar_contact/src/impl/SimpleContact.cpp