SchmidCostaExponentialLaw2d.hpp

00001 /*
00002 
00003 Copyright (C) University of Oxford, 2005-2010
00004 
00005 University of Oxford means the Chancellor, Masters and Scholars of the
00006 University of Oxford, having an administrative office at Wellington
00007 Square, Oxford OX1 2JD, UK.
00008 
00009 This file is part of Chaste.
00010 
00011 Chaste is free software: you can redistribute it and/or modify it
00012 under the terms of the GNU Lesser General Public License as published
00013 by the Free Software Foundation, either version 2.1 of the License, or
00014 (at your option) any later version.
00015 
00016 Chaste is distributed in the hope that it will be useful, but WITHOUT
00017 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00018 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
00019 License for more details. The offer of Chaste under the terms of the
00020 License is subject to the License being interpreted in accordance with
00021 English Law and subject to any action against the University of Oxford
00022 being under the jurisdiction of the English Courts.
00023 
00024 You should have received a copy of the GNU Lesser General Public License
00025 along with Chaste. If not, see <http://www.gnu.org/licenses/>.
00026 
00027 */
00028 
00029 
00030 #ifndef SCHMIDCOSTAEXPONENTIALLAW2D_HPP_
00031 #define SCHMIDCOSTAEXPONENTIALLAW2D_HPP_
00032 
00033 #include "AbstractIncompressibleMaterialLaw.hpp"
00034 
00051 class SchmidCostaExponentialLaw2d : public AbstractIncompressibleMaterialLaw<2>
00052 {
00053 private :
00054 
00056     double mA;         // should be kPa as the assembler gets the active tension in kPa
00057 
00059     std::vector<std::vector<double> > mB;
00060 
00062     c_matrix<double,2,2> mIdentity;
00063 
00065     c_matrix<double,2,2>* mpChangeOfBasisMatrix;
00066 
00067 public :
00068 
00070     SchmidCostaExponentialLaw2d();
00071 
00090     void ComputeStressAndStressDerivative(c_matrix<double,2,2>&  rC,
00091                                           c_matrix<double,2,2>&  rInvC,
00092                                           double                 pressure,
00093                                           c_matrix<double,2,2>&  rT,
00094                                           FourthOrderTensor<2>&  rDTdE,
00095                                           bool                   computeDTdE);
00096 
00100     double GetA();
00101 
00105     std::vector<std::vector<double> > GetB();
00106 
00110     double GetZeroStrainPressure();
00111 
00123     void SetChangeOfBasisMatrix(c_matrix<double,2,2>& rChangeOfBasisMatrix)
00124     {
00125         mpChangeOfBasisMatrix = &rChangeOfBasisMatrix;
00126     }
00127 };
00128 
00129 #endif /* SCHMIDCOSTAEXPONENTIALLAW2D_HPP_*/