ComputeMeanThermalExpansionEigenstrainBase.h

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#pragma once
 
#include "ComputeThermalExpansionEigenstrainBase.h"
 
class ComputeMeanThermalExpansionEigenstrainBase;
 
template <>
InputParameters validParams<ComputeMeanThermalExpansionEigenstrainBase>();
 
class ComputeMeanThermalExpansionEigenstrainBase : public ComputeThermalExpansionEigenstrainBase
{
public:
  static InputParameters validParams();
 
  ComputeMeanThermalExpansionEigenstrainBase(const InputParameters & parameters);
 
protected:
  /*
   * Compute the total thermal strain relative to the stress-free temperature at the
   * current temperature, as well as the current instantaneous thermal expansion coefficient.
   * param thermal_strain    The current total linear thermal strain (\f$\delta L / L\f$)
   * param instantaneous_cte The current instantaneous coefficient of thermal expansion
   *                         (derivative of thermal_strain wrt temperature
   */
  virtual void computeThermalStrain(Real & thermal_strain, Real & instantaneous_cte) override;
 
  /*
   * Get the reference temperature for the mean thermal expansion relationship.  This is
   * the temperature at which \f$\delta L = 0\f$.
   */
  virtual Real referenceTemperature() = 0;
 
  /*
   * Compute the mean thermal expansion coefficient relative to the reference temperature.
   * This is the linear thermal strain divided by the temperature difference:
   * \f$\bar{\alpha}=(\delta L / L)/(T - T_{ref})\f$.
   * param temperature  temperature at which this is evaluated
   */
  virtual Real meanThermalExpansionCoefficient(const Real temperature) = 0;
 
  /*
   * Compute the derivative of the mean thermal expansion coefficient \f$\bar{\alpha}\f$
   * with respect to temperature, where \f$\bar{\alpha}=(\delta L / L)/(T - T_{ref})\f$.
   * param temperature  temperature at which this is evaluated
   */
  virtual Real meanThermalExpansionCoefficientDerivative(const Real temperature) = 0;
};