ContactOps.hpp

Go to the documentation of this file.

/* This file is part of MoFEM.
 * MoFEM is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 *
 * MoFEM is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with MoFEM. If not, see <http://www.gnu.org/licenses/>. */
 
/**
 * \file ContactOps.hpp
 * \example ContactOps.hpp
 */
 
namespace ContactOps {
 
 
//! [Common data]
struct CommonData {
  boost::shared_ptr<MatrixDouble> mDPtr;
  boost::shared_ptr<MatrixDouble> mGradPtr;
  boost::shared_ptr<MatrixDouble> mStrainPtr;
  boost::shared_ptr<MatrixDouble> mStressPtr;
 
  boost::shared_ptr<MatrixDouble> contactStressPtr;
  boost::shared_ptr<MatrixDouble> contactStressDivergencePtr;
  boost::shared_ptr<MatrixDouble> contactTractionPtr;
  boost::shared_ptr<MatrixDouble> contactDispPtr;
 
  boost::shared_ptr<MatrixDouble> curlContactStressPtr;
};
//! [Common data]
 
FTensor::Index<'i', SPACE_DIM> i;
FTensor::Index<'j', SPACE_DIM> j;
FTensor::Index<'k', SPACE_DIM> k;
FTensor::Index<'l', SPACE_DIM> l;
 
struct OpConstrainBoundaryRhs : public AssemblyBoundaryEleOp {
  OpConstrainBoundaryRhs(const std::string field_name,
                         boost::shared_ptr<CommonData> common_data_ptr);
  MoFEMErrorCode iNtegrate(EntitiesFieldData::EntData &data);
 
private:
  boost::shared_ptr<CommonData> commonDataPtr;
};
 
struct OpConstrainBoundaryLhs_dU : public AssemblyBoundaryEleOp {
  OpConstrainBoundaryLhs_dU(const std::string row_field_name,
                            const std::string col_field_name,
                            boost::shared_ptr<CommonData> common_data_ptr);
  MoFEMErrorCode iNtegrate(EntitiesFieldData::EntData &row_data,
                           EntitiesFieldData::EntData &col_data);
 
private:
  boost::shared_ptr<CommonData> commonDataPtr;
};
 
struct OpConstrainBoundaryLhs_dTraction : public AssemblyBoundaryEleOp {
  OpConstrainBoundaryLhs_dTraction(
      const std::string row_field_name, const std::string col_field_name,
      boost::shared_ptr<CommonData> common_data_ptr);
  MoFEMErrorCode iNtegrate(EntitiesFieldData::EntData &row_data,
                           EntitiesFieldData::EntData &col_data);
 
private:
  boost::shared_ptr<CommonData> commonDataPtr;
};
 
template <typename T1, typename T2>
inline FTensor::Tensor1<double, SPACE_DIM>
normal(FTensor::Tensor1<T1, 3> &t_coords,
       FTensor::Tensor1<T2, SPACE_DIM> &t_disp) {
  FTensor::Tensor1<double, SPACE_DIM> t_normal;
  t_normal(i) = 0;
  t_normal(1) = 1.;
  return t_normal;
}
 
template <typename T>
inline double gap0(FTensor::Tensor1<T, 3> &t_coords,
                   FTensor::Tensor1<double, SPACE_DIM> &t_normal) {
  return (-0.5 - t_coords(1)) * t_normal(1);
}
 
template <typename T>
inline double gap(FTensor::Tensor1<T, SPACE_DIM> &t_disp,
                  FTensor::Tensor1<double, SPACE_DIM> &t_normal) {
  return t_disp(i) * t_normal(i);
}
 
template <typename T>
inline double normal_traction(FTensor::Tensor1<T, SPACE_DIM> &t_traction,
                              FTensor::Tensor1<double, SPACE_DIM> &t_normal) {
  return -t_traction(i) * t_normal(i);
}
 
inline double sign(double x) {
  if (x == 0)
    return 0;
  else if (x > 0)
    return 1;
  else
    return -1;
};
 
inline double w(const double g, const double t) { return g - cn * t; }
 
inline double constrian(double &&g0, double &&g, double &&t) {
  return (w(g - g0, t) + std::abs(w(g - g0, t))) / 2 + g0;
};
 
inline double diff_constrains_dtraction(double &&g0, double &&g, double &&t) {
  return -cn * (1 + sign(w(g - g0, t))) / 2;
}
 
inline double diff_constrains_dgap(double &&g0, double &&g, double &&t) {
  return (1 + sign(w(g - g0, t))) / 2;
}
 
OpConstrainBoundaryRhs::OpConstrainBoundaryRhs(
    const std::string field_name, boost::shared_ptr<CommonData> common_data_ptr)
    : AssemblyBoundaryEleOp(field_name, field_name, DomainEleOp::OPROW),
      commonDataPtr(common_data_ptr) {}
 
MoFEMErrorCode
OpConstrainBoundaryRhs::iNtegrate(EntitiesFieldData::EntData &data) {
  MoFEMFunctionBegin;
 
  const size_t nb_gauss_pts = AssemblyBoundaryEleOp::getGaussPts().size2();
 
  auto &nf = AssemblyBoundaryEleOp::locF;
 
  auto t_normal = getFTensor1Normal();
  t_normal(i) /= sqrt(t_normal(j) * t_normal(j));
 
  auto t_w = getFTensor0IntegrationWeight();
  auto t_disp = getFTensor1FromMat<SPACE_DIM>(*(commonDataPtr->contactDispPtr));
  auto t_traction =
      getFTensor1FromMat<SPACE_DIM>(*(commonDataPtr->contactTractionPtr));
  auto t_coords = getFTensor1CoordsAtGaussPts();
 
  size_t nb_base_functions = data.getN().size2() / 3;
  auto t_base = data.getFTensor1N<3>();
  for (size_t gg = 0; gg != nb_gauss_pts; ++gg) {
 
    auto t_nf = getFTensor1FromPtr<SPACE_DIM>(&nf[0]);
 
    const double alpha = t_w * getMeasure();
 
    auto t_contact_normal = normal(t_coords, t_disp);
    FTensor::Tensor2<double, SPACE_DIM, SPACE_DIM> t_P;
    t_P(i, j) = t_contact_normal(i) * t_contact_normal(j);
 
    FTensor::Tensor2<double, SPACE_DIM, SPACE_DIM> t_Q;
    t_Q(i, j) = kronecker_delta(i, j) - t_P(i, j);
 
    FTensor::Tensor1<double, SPACE_DIM> t_rhs_constrains;
 
    t_rhs_constrains(i) =
        t_contact_normal(i) *
        constrian(gap0(t_coords, t_contact_normal),
                  gap(t_disp, t_contact_normal),
                  normal_traction(t_traction, t_contact_normal));
 
    FTensor::Tensor1<double, SPACE_DIM> t_rhs_tangent_disp,
        t_rhs_tangent_traction;
    t_rhs_tangent_disp(i) = t_Q(i, j) * t_disp(j);
    t_rhs_tangent_traction(i) = cn * t_Q(i, j) * t_traction(j);
 
    size_t bb = 0;
    for (; bb != AssemblyBoundaryEleOp::nbRows / SPACE_DIM; ++bb) {
      const double beta = alpha * (t_base(i) * t_normal(i));
 
      t_nf(i) -= beta * t_rhs_constrains(i);
      t_nf(i) -= beta * t_rhs_tangent_disp(i);
      t_nf(i) += beta * t_rhs_tangent_traction(i);
 
      ++t_nf;
      ++t_base;
    }
    for (; bb < nb_base_functions; ++bb)
      ++t_base;
 
    ++t_disp;
    ++t_traction;
    ++t_coords;
    ++t_w;
  }
 
  MoFEMFunctionReturn(0);
}
 
OpConstrainBoundaryLhs_dU::OpConstrainBoundaryLhs_dU(
    const std::string row_field_name, const std::string col_field_name,
    boost::shared_ptr<CommonData> common_data_ptr)
    : AssemblyBoundaryEleOp(row_field_name, col_field_name,
                            DomainEleOp::OPROWCOL),
      commonDataPtr(common_data_ptr) {
  sYmm = false;
}
 
MoFEMErrorCode OpConstrainBoundaryLhs_dU::iNtegrate(
    EntitiesFieldData::EntData &row_data,
    EntitiesFieldData::EntData &col_data) {
  MoFEMFunctionBegin;
 
  const size_t nb_gauss_pts = getGaussPts().size2();
  auto &locMat = AssemblyBoundaryEleOp::locMat;
 
  auto t_normal = getFTensor1Normal();
  t_normal(i) /= sqrt(t_normal(j) * t_normal(j));
 
  auto t_disp = getFTensor1FromMat<SPACE_DIM>(*(commonDataPtr->contactDispPtr));
  auto t_traction =
      getFTensor1FromMat<SPACE_DIM>(*(commonDataPtr->contactTractionPtr));
  auto t_coords = getFTensor1CoordsAtGaussPts();
 
  auto t_w = getFTensor0IntegrationWeight();
  auto t_row_base = row_data.getFTensor1N<3>();
  size_t nb_face_functions = row_data.getN().size2() / 3;
 
  for (size_t gg = 0; gg != nb_gauss_pts; ++gg) {
 
    const double alpha = t_w * getMeasure();
 
    auto t_contact_normal = normal(t_coords, t_disp);
    FTensor::Tensor2<double, SPACE_DIM, SPACE_DIM> t_P;
    t_P(i, j) = t_contact_normal(i) * t_contact_normal(j);
 
    FTensor::Tensor2<double, SPACE_DIM, SPACE_DIM> t_Q;
    t_Q(i, j) = kronecker_delta(i, j) - t_P(i, j);
 
    auto diff_constrain = diff_constrains_dgap(
        gap0(t_coords, t_contact_normal), gap(t_disp, t_contact_normal),
        normal_traction(t_traction, t_contact_normal));
 
    size_t rr = 0;
    for (; rr != AssemblyBoundaryEleOp::nbRows / SPACE_DIM; ++rr) {
 
      auto t_mat = getFTensor2FromArray<SPACE_DIM, SPACE_DIM, SPACE_DIM>(
          locMat, SPACE_DIM * rr);
 
      const double row_base = t_row_base(i) * t_normal(i);
 
      auto t_col_base = col_data.getFTensor0N(gg, 0);
      for (size_t cc = 0; cc != AssemblyBoundaryEleOp::nbCols / SPACE_DIM;
           ++cc) {
        const double beta = alpha * row_base * t_col_base;
 
        t_mat(i, j) -= (beta * diff_constrain) * t_P(i, j);
        t_mat(i, j) -= beta * t_Q(i, j);
 
        ++t_col_base;
        ++t_mat;
      }
 
      ++t_row_base;
    }
    for (; rr < nb_face_functions; ++rr)
      ++t_row_base;
 
    ++t_disp;
    ++t_traction;
    ++t_coords;
    ++t_w;
  }
 
  MoFEMFunctionReturn(0);
}
 
OpConstrainBoundaryLhs_dTraction::OpConstrainBoundaryLhs_dTraction(
    const std::string row_field_name, const std::string col_field_name,
    boost::shared_ptr<CommonData> common_data_ptr)
    : AssemblyBoundaryEleOp(row_field_name, col_field_name,
                            DomainEleOp::OPROWCOL),
      commonDataPtr(common_data_ptr) {
  sYmm = false;
}
 
MoFEMErrorCode OpConstrainBoundaryLhs_dTraction::iNtegrate(
    EntitiesFieldData::EntData &row_data,
    EntitiesFieldData::EntData &col_data) {
  MoFEMFunctionBegin;
 
  const size_t nb_gauss_pts = getGaussPts().size2();
  auto &locMat = AssemblyBoundaryEleOp::locMat;
 
  auto t_normal = getFTensor1Normal();
  t_normal(i) /= sqrt(t_normal(j) * t_normal(j));
 
  auto t_disp = getFTensor1FromMat<SPACE_DIM>(*(commonDataPtr->contactDispPtr));
  auto t_traction =
      getFTensor1FromMat<SPACE_DIM>(*(commonDataPtr->contactTractionPtr));
  auto t_coords = getFTensor1CoordsAtGaussPts();
 
  auto t_w = getFTensor0IntegrationWeight();
  auto t_row_base = row_data.getFTensor1N<3>();
  size_t nb_face_functions = row_data.getN().size2() / 3;
 
  for (size_t gg = 0; gg != nb_gauss_pts; ++gg) {
 
    const double alpha = t_w * getMeasure();
 
    auto t_contact_normal = normal(t_coords, t_disp);
    FTensor::Tensor2<double, SPACE_DIM, SPACE_DIM> t_P;
    t_P(i, j) = t_contact_normal(i) * t_contact_normal(j);
 
    FTensor::Tensor2<double, SPACE_DIM, SPACE_DIM> t_Q;
    t_Q(i, j) = kronecker_delta(i, j) - t_P(i, j);
 
    const double diff_traction = diff_constrains_dtraction(
        gap0(t_coords, t_contact_normal), gap(t_disp, t_contact_normal),
        normal_traction(t_traction, t_contact_normal));
 
    size_t rr = 0;
    for (; rr != AssemblyBoundaryEleOp::nbRows / SPACE_DIM; ++rr) {
 
      auto t_mat = getFTensor2FromArray<SPACE_DIM, SPACE_DIM, SPACE_DIM>(
          locMat, SPACE_DIM * rr);
      const double row_base = t_row_base(i) * t_normal(i);
 
      auto t_col_base = col_data.getFTensor1N<3>(gg, 0);
      for (size_t cc = 0; cc != AssemblyBoundaryEleOp::nbCols / SPACE_DIM;
           ++cc) {
        const double col_base = t_col_base(i) * t_normal(i);
        const double beta = alpha * row_base * col_base;
 
        t_mat(i, j) += (beta * diff_traction) * t_P(i, j);
        t_mat(i, j) += beta * cn * t_Q(i, j);
 
        ++t_col_base;
        ++t_mat;
      }
 
      ++t_row_base;
    }
    for (; rr < nb_face_functions; ++rr)
      ++t_row_base;
 
    ++t_disp;
    ++t_traction;
    ++t_coords;
    ++t_w;
  }
 
  MoFEMFunctionReturn(0);
}
 
}; // namespace ContactOps