type: kinehardening

references:
  - J.A. Wollmershauser et al.,
    International Journal of Fatigue 36(1):181-193, 2012,
    https://doi.org/10.1016/j.ijfatigue.2011.07.008

output: [xi, chi, chi_flip, gamma_flip, gamma, sgn(gamma)]

N_sl: [12]

xi_0:     [0.070e+9] # τ_0,for
xi_inf:   [0.015e+9] # τ_1,for
h_0_xi:   [0.065e+9] # θ_0,for
h_inf_xi: [0.045e+9] # θ_1,for

chi_inf:  [0.027e+9] # τ_1,bs
h_0_chi:     [55e+9] # θ_0,bs
h_inf_chi:  [1.3e+9] # θ_1,bs

n: [20]                # not mentioned in the reference
dot_gamma_0: [1e-4]    # not mentioned in the reference
h_sl-sl: [1, 1, 1, 1, 1, 1, 1]