a_0 λ U_inf G_Ic
4.50E-03 2.21 3.30E+05 6.28E+03
5.00E-03 2.00 2.50E+05 5.55E+03
8.60E-03 1.82 1.70E+05 6.81E+03
1.10E-02 1.60 9.00E+04 4.92E+03
1.60E-02 1.62 9.50E+04 7.50E+03
average ==> 6.21E+03 (J/m^2)