MarmotViscoelasticity.h

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/* ---------------------------------------------------------------------
 *                                       _
 *  _ __ ___   __ _ _ __ _ __ ___   ___ | |_
 * | '_ ` _ \ / _` | '__| '_ ` _ \ / _ \| __|
 * | | | | | | (_| | |  | | | | | | (_) | |_
 * |_| |_| |_|\__,_|_|  |_| |_| |_|\___/ \__|
 *
 * Unit of Strength of Materials and Structural Analysis
 * University of Innsbruck,
 * 2020 - today
 *
 * festigkeitslehre@uibk.ac.at
 *
 * Alexander Dummer alexander.dummer@uibk.ac.at
 *
 * This file is part of the MAteRialMOdellingToolbox (marmot).
 *
 * This library 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 2.1 of the License, or (at your option) any later version.
 *
 * The full text of the license can be found in the file LICENSE.md at
 * the top level directory of marmot.
 * ---------------------------------------------------------------------
 */
 
#pragma once
#include "Marmot/MarmotVoigt.h"
 
namespace Marmot {
 
  namespace ContinuumMechanics {
 
    namespace Viscoelasticity {
 
      namespace ComplianceFunctions {
 
        template < typename T_ >
        T_ logPowerLaw( T_ tau, double m, double n )
        {
          T_ val = m * log( 1. + pow( tau, n ) );
          return val;
        }
 
        template < typename T_ >
        T_ powerLaw( T_ tau, double m, double n )
        {
          T_ val = m * pow( tau, n );
          return val;
        }
      } // namespace ComplianceFunctions
    }   // namespace Viscoelasticity
  }     // namespace ContinuumMechanics
} // namespace Marmot