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MaterialIndex

oxiphysics_materials

Struct MaterialIndex 

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pub struct MaterialIndex;
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Multi-criterion material selection index (Ashby-type).

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impl MaterialIndex

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pub fn beam_stiffness_index(young_modulus: f64, density: f64) -> f64

Minimum mass beam (stiffness-limited): E^{1/2} / ρ.

Higher is better for minimum weight beams under bending.

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pub fn column_buckling_index(young_modulus: f64, density: f64) -> f64

Minimum mass column (buckling-limited): E^{1/3} / ρ.

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pub fn panel_stiffness_index(young_modulus: f64, density: f64) -> f64

Minimum mass panel (stiffness-limited): E^{1/3} / ρ.

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pub fn beam_strength_index(yield_strength: f64, density: f64) -> f64

Strength-limited beam: σ_y^{2/3} / ρ.

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pub fn thermal_insulation_index( conductivity: f64, density: f64, specific_heat: f64, ) -> f64

Thermal insulation index (low conductivity, high specific heat): λ / (ρ · cp). Lower thermal diffusivity = better insulator.

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pub fn pressure_vessel_index(k_ic: f64, yield_strength: f64) -> f64

Pressure vessel (fracture-limited): K_Ic² / (π · σ_y²)

Proportional to critical crack length — higher is safer.

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pub fn wear_resistance_index(yield_strength: f64, young_modulus: f64) -> f64

Wear resistance index: H / (E · λ) where H ≈ 3σ_y (Vickers).

Higher yield → better wear resistance relative to contact mechanics.

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