# 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
256.9  4.17E-007
257.3  2.77E-007
260.7  1.19E-007
303.2  9.43E-007
316.0  1.24E-006
321.2  1.06E-006
354.7  1.42E-006
356.1  2.04E-006
389.4  2.13E-006
405.9  2.62E-006
406.1  2.20E-006
457.6  3.88E-006
549.4  5.92E-006
606.8  7.37E-006
684.5  9.17E-006
788.5  1.14E-005
839.6  1.30E-005