Milieu_Elasticite.h

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#ifndef Milieu_Elasticite_included
#define Milieu_Elasticite_included
 
#include <Milieu_base.h>
 
/*! @brief Isotropic small-strain linear elastic medium.
 *
 *  Stores and updates the material properties used by `Equation_Navier_Cauchy`.
 *
 *  Primary input fields (uniform or space-dependent):
 *  - ch_E_: Young's modulus \f$E\f$ [Pa]
 *  - ch_nu_: Poisson's ratio \f$\nu\f$ [-]
 *
 *  Convenience / derived fields:
 *  - ch_lambda_lame_: first Lamé parameter \f$\lambda\f$ [Pa]
 *  - ch_mu_: second Lamé parameter (shear modulus) \f$\mu\f$ [Pa]
 *  - ch_K_: bulk modulus \f$K\f$ [Pa]
 *
 *  Optional coupling fields:
 *  - ch_coeff_dilatation_th_: linear thermal expansion coefficient \f$\alpha\f$ [1/K]
 *  - ch_rho_lag_: Lagrangian density \f$\rho_\text{lag}\f$ [kg/m^3]
 */
class Milieu_Elasticite : public Milieu_base
{
  Declare_instanciable(Milieu_Elasticite);
 
public:
  void set_param(Param& param) const override;
  void creer_champs_non_lus() override;
  void discretiser(const Probleme_base& pb, const Discretisation_base& dis) override;
  int initialiser(const double temps) override;
  void mettre_a_jour(double temps) override;
  bool initTimeStep(double dt) override;
 
  const Champ_Don_base& young_modulus() const { return ch_E_.valeur(); }
  Champ_Don_base& young_modulus() { return ch_E_.valeur(); }
 
  const Champ_Don_base& poisson_ratio() const { return ch_nu_.valeur(); }
  Champ_Don_base& poisson_ratio() { return ch_nu_.valeur(); }
 
  const Champ_Don_base& lambda_lame() const { return ch_lambda_lame_.valeur(); }
  Champ_Don_base& lambda_lame() { return ch_lambda_lame_.valeur(); }
 
  const Champ_Don_base& mu_lame() const { return ch_mu_.valeur(); }
  Champ_Don_base& mu_lame() { return ch_mu_.valeur(); }
 
  const Champ_Don_base& bulk_modulus() const { return ch_K_.valeur(); }
  Champ_Don_base& bulk_modulus() { return ch_K_.valeur(); }
 
  const Champ_Don_base& thermal_expansion() const { return ch_coeff_dilatation_th_.valeur(); }
  Champ_Don_base& thermal_expansion() { return ch_coeff_dilatation_th_.valeur(); }
 
  void update_fields(double temps, bool);
 
protected:
  void verifier_coherence_champs(int& err, Nom& message) override;
 
private:
  void ensure_rho_field();
 
  OWN_PTR(Champ_Inc_base) ch_rho_lag_;
  OWN_PTR(Champ_Don_base) ch_E_;
  OWN_PTR(Champ_Don_base) ch_nu_;
  OWN_PTR(Champ_Don_base) ch_lambda_lame_;
  OWN_PTR(Champ_Don_base) ch_mu_;
  OWN_PTR(Champ_Don_base) ch_K_;
  OWN_PTR(Champ_Don_base) ch_coeff_dilatation_th_;
 
  OBS_PTR(Equation_base) eq_;
};
 
#endif