Function bulk_modulus_from_youngs_and_poisson 

pub fn bulk_modulus_from_youngs_and_poisson(
    youngs_modulus: f64,
    poisson_ratio: f64,
) -> Option<f64>

Computes bulk modulus from Young’s modulus and Poisson’s ratio.

Formula: K = E / (3 * (1 - 2ν)).

Returns None when youngs_modulus is negative, when the denominator is less than or equal to zero, or when any input or result is not finite.