Struct PrimaryCreepModel 

pub struct PrimaryCreepModel {
    pub a: f64,
    pub n: f64,
    pub m: f64,
}

Primary creep using Bailey-Norton time-hardening: ε_p = A * σ^n * t^m.

Fields

a: f64

Constant A

n: f64

Stress exponent n

m: f64

Time exponent m (0 < m < 1 for primary hardening)

Implementations

impl PrimaryCreepModel

pub fn new(a: f64, n: f64, m: f64) -> Self

Create a primary creep model.

pub fn strain(&self, sigma: f64, t: f64) -> f64

Accumulated primary creep strain at stress sigma and time t.

pub fn strain_rate(&self, sigma: f64, t: f64) -> f64

Primary creep rate: dε/dt = A * σ^n * m * t^(m-1).

pub fn transition_time( &self, norton: &NortonCreep, sigma: f64, temperature: f64, ) -> f64

Time at which primary rate equals the steady-state (Norton) rate.

Returns the transition time from primary to secondary creep.