Struct ProgressiveDamage 

pub struct ProgressiveDamage {
    pub e0: f64,
    pub nu: f64,
    pub d11: f64,
    pub d22: f64,
}

Progressive stiffness degradation model for composite materials.

Tracks separate damage variables D11 (fiber direction) and D22 (transverse direction). Effective stiffness:

E11_eff = (1 - D11) * E11, E22_eff = (1 - D22) * E22

Fields

e0: f64

Undamaged Young’s modulus (isotropic assumption) [Pa].

nu: f64

Poisson’s ratio.

d11: f64

Fiber-direction damage variable D11 ∈ [0, 1).

d22: f64

Transverse-direction damage variable D22 ∈ [0, 1).

Implementations

impl ProgressiveDamage

pub fn new(e0: f64, nu: f64, d11: f64, d22: f64) -> Self

Create a new progressive damage model.

pub fn e11_eff(&self) -> f64

Effective fiber-direction stiffness.

pub fn e22_eff(&self) -> f64

Effective transverse stiffness.

pub fn effective_stiffness_tensor(&self) -> [[f64; 3]; 3]

3×3 effective stiffness tensor (plane stress, Voigt notation: 11, 22, 12).

Returns [[C11, C12, 0], [C12, C22, 0], [0, 0, C66]].

pub fn update_damage(&mut self, d11_new: f64, d22_new: f64)

Update damage variables (irreversible – only increases).

pub fn residual_strength(&self, sigma0: f64, _alpha_m: f64) -> f64

Residual strength in fiber direction after damage.

σ_res = σ_0 · (1 - D11)^alpha_f · (1 - D22)^alpha_m

Trait Implementations

impl Clone for ProgressiveDamage

fn clone(&self) -> ProgressiveDamage

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ProgressiveDamage

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.