# topperAA2024_R=0.3

# 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
70.1  5.06794e-08
71.0  3.33279e-08
71.2  6.78866e-08
72.2  1.07265e-07
73.9  9.81564e-08
74.2  1.45535e-07
77.2  1.28214e-07
78.7  2.3298e-07
87.7  4.63062e-07
94.1  8.00078e-07
98.1  1.58933e-06
117.4  4.02363e-06
135.6  3.92737e-06
147.3  4.24134e-06
158.3  5.06992e-06
166.3  5.75905e-06
177.5  8.43533e-06
192.9  7.72292e-06
209.6  7.82703e-06
217.8  8.56E-06