Class: Member

Class to represent a member of the population in genetic algorithm optimization.
Stores the functions for cost function calculation.
Built on the Pydantic BaseModel.

Attributes

  • ga_params, type: GeneticAlgorithmParams
  • optimization_params, type: OptimizationParams
  • values, type: np.ndarray = None

Class Methods

  • get_cost

    • Calculates the total cost for the current member based on effective properties and concentration factors, incorporating domain-specific weights and tolerances.
    • The cost function evaluates the deviation of effective properties and concentration factors from desired values, penalizing larger deviations while accounting for the relative importance of different property domains.
    • Notes
      • There is one effective property per property
      • (Non-modulus) There are two concentration factors per property per material
      • (Modulus) Bulk and shear moduli collectively have two concentration factors per material (instead of what would be four)
    • Args: include_cost_breakdown (bool, optional)
    • Returns: cost (float)

  • get_general_eff_prop_and_cfs

    • Compute the effective non-modulus properties and concentration factors of a composite material using the Hashin-Shtrikman bounds.
    • Notes
      • idx is the index in self.values where category properties begin
    • Args: idx (int, optional)
    • Returns:
      • A tuple containing:
        • effective_properties (list)
        • concentration_factors (list)

  • get_elastic_eff_props_and_cfs

    • Compute the effective modulus properties and concentration factors of a composite material using the Hashin-Shtrikman bounds.
    • Notes
      • idx is the index in self.values where category properties begin
    • Args: idx (int, optional)
    • Returns:
      • A tuple containing:
        • effective_properties (list)
        • concentration_factors (list)

  • get_effective_properties

    • Computes the effective properties of a material system based on the Hashin-Shtrikman bounds for various property categories.
    • Returns: effective properties (ndarray)