# G40.21 steel R=0.7
# Topper, T.H., D.L.DuQuesnay, M.A.Pompetzki, "Crack Closure, Damage, and Short 
# Crack Growth under Variable Amplitude Loading,"  EMAS Conf. on Theory, 
# Concepts and Num. Analysis of Fatigue, Warley, UK, 1993, pp.201-236.
#Note: data digitized from graphs and may contain errors.

#Conversions:
## 1 ksi*sqrt(inch) = 1.0989*MPa*sqrt(m)
## 1 MPa*sqrt(m)  =   31.6228*N/(mm**(3/2) )
## 1 MPa*sqrt(mm) =         1 N/(mm**(3/2) )
#All inputs converted to    MPa*sqrt(mm)   and  mm/cycle
#Note that this is same as  N/(mm**(3/2))  and  mm/cycle
#deltaKunits=  mpa_mm
#dadnUnits= mm

#MPa*sqrt(mm)  mm/Cycle
118.0  1.27974e-07
121.1  1.90061e-07
122.1  4.14524e-08
128.7  4.71345e-07
136.4  4.44695e-07
137.2  3.22236e-07
146.8  5.70653e-07
152.3  5.9642e-07
153.9  6.32438e-07
176.4  7.77008e-07
199.0  1.17171e-06
227.1  1.12229e-06
247.0  1.29996e-06
261.6  1.55025e-06
280.1  1.90379e-06
324.5  2.33914e-06
379.8  3.2791e-06
478.6  5.17049e-06
548.6  6.93577e-06
609.2  9.16665e-06