# G40.21 steel,  R=0.4
# 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
152.2  2.10304e-07
160.6  4.51658e-07
162.4  4.84351e-08
174.6  5.08385e-07
193.5  7.56607e-07
222.8  9.5836e-07
255.3  1.06353e-06
290.9  1.23336e-06
350.8  1.83703e-06
361.1  2.98376e-06
426.9  3.61738e-06
507.2  4.38576e-06
566.9  1.02926e-05