conspire 0.7.6

The Rust interface to conspire.
Documentation 
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//! Plastic fluid constitutive models.

use crate::units::Stress;
use crate::{constitutive::ConstitutiveError, math::Quantity};
use std::fmt::Debug;

/// Required methods for plastic fluid constitutive models.
pub trait Plastic
where
    Self: Clone + Debug,
{
    /// Returns the initial yield stress.
    fn initial_yield_stress(&self) -> Quantity<Stress>;
    /// Returns the isotropic hardening slope.
    fn hardening_slope(&self) -> Quantity<Stress>;
    /// Calculates and returns the yield stress.
    ///
    /// ```math
    /// Y = Y_0 + H\,\varepsilon_\mathrm{p}
    /// ```
    fn yield_stress(
        &self,
        equivalent_plastic_strain: Quantity,
    ) -> Result<Quantity<Stress>, ConstitutiveError> {
        Ok(self.initial_yield_stress() + self.hardening_slope() * equivalent_plastic_strain)
    }
}