Creep Rate Rechner — Formel
## Steady-State Creep Rate
Creep is the slow, time-dependent deformation of materials under sustained load at elevated temperatures. The secondary (steady-state) creep rate follows a power-law Arrhenius equation.
### Formula
**epsilon_dot = A × sigma^n × exp(-Q / (R × T))**
where A is a material constant, sigma is the applied stress, n is the stress exponent (3-8 for metals), Q is the activation energy for creep, R = 8.314 J/(mol·K) is the gas constant, and T is absolute temperature.
Creep is the slow, time-dependent deformation of materials under sustained load at elevated temperatures. The secondary (steady-state) creep rate follows a power-law Arrhenius equation.
### Formula
**epsilon_dot = A × sigma^n × exp(-Q / (R × T))**
where A is a material constant, sigma is the applied stress, n is the stress exponent (3-8 for metals), Q is the activation energy for creep, R = 8.314 J/(mol·K) is the gas constant, and T is absolute temperature.
Lösungsbeispiel
A nickel alloy at 800 K under 100 MPa (A=1e10, n=5, Q=250 kJ/mol).
- sigma^n = 100^5 = 1 × 10^10
- Q/(RT) = 250000 / (8.314 × 800) = 37.57
- exp(-37.57) = 4.83 × 10^-17
- Creep rate = 1e10 × 1e10 × 4.83e-17 = 4.83 × 10^3 s^-1 ... (values depend on actual A)