type: Hooke

references:
  - Wang et al.,
    Materials Science and Engineering:A 674:406-412, 2016,
    https://doi.org/10.1016/j.msea.2016.08.010,
    fitted to Tab. 2 (last 3 rows)

C_11: 243.3e+9
C_11,T: -6.380e+5
C_11,T^2: -8.362e+4

C_12: 156.7e+9
C_12,T: 2.091e+7
C_12,T^2: -4.675e+4

C_44: 99.3e+9
C_44,T: -3.800e+7
C_44,T^2: 1.587e+4

T_ref: 293.15