11 lines
263 B
Python
11 lines
263 B
Python
import numpy as np
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def stiffness_tp26(T, f, Emax, Emin, phi, z0, z1, T0=20.0):
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alphaT = np.exp(phi * ((1 / (T + 273.15)) - (1 / (T0 + 273.15))))
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x = np.log(f * alphaT) / np.log(10)
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E = Emin + (Emax - Emin) / (1 + np.exp(z0 * x + z1))
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return E
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