Version 2 of PPgNN for Fatigue Life of Superalloys

This model is uses the PPgNN architecture to predict Creep-Fatigue and Thermomechanical Fatigue Life of Ni-base Superalloys. The model will plot data points that have similar parameters to the one inputted into the model including runout cases. Tests that did not runout are displayed as a blue dot, while tests that did runout are displayed as a red triangle. There are several improvements made to this model:

1. The model now takes crystallographic orientation into account and is an input to the model
2. More data has been added to the training dataset for the model
3. The model is trained to 500 epochs instead of 120 epochs

Reference Statement

This is neural network model uses data that was collected from multiple sources. A link to the data will be added in the near future along with a link to the list of references.

Parameters

Max Temperature \((T_{max})\): The maximum temperature of the specimin in Celcius \((^{\large\circ}C)\)

Min Temperature \((T_{min})\): The minimum temperature of the specimin in Celcius \((^{\large\circ}C)\)

Alternative Temperature Strain Phase Factor \((ATSPF)\): A variable dependent on the difference of temperature and if the test was Isothermal Fatigue \(\text{(IF)}\), In-Phase Thermomechanical Fatigue \(\text{(IP TMF)}\), or Out-of-Phase Themromechanical Fatigue \(\text{(OP TMF)}\). If the test was:
 \(\text{IF}\) then \(\text{TSPF} = 0\) \(\text{IP TMF}\) then \(\text{TSPF} = 1\) \(\text{OP TMF}\) then \(\text{TSPF} = -1\)
and ATSPF is caluclated by
 \(ATSPF = \frac{T_{max} - T_{min}}{500}\;*\;TSPF\)

Cyclic Frequency \((Freq)\): The cyclic frequency of the test, not including dwell times, on the specimin in \((Hz)\).
Total frequency displayed in the title of the plot is the cyclic frequency including dwell times calculated using the equation \(\text{Total Freq} = \frac{1}{(\frac{1}{Freq} + 60(Dwell_C + Dwell_T))}\).

Compression Dwell \((Dwell_C)\): Compression dwell applied to the specimin during the test in minutes \((min)\)

Tensile Dwell \((Dwell_T)\): Tensile dwell applied to the specimin during the test in minutes \((min)\)

Orientation \((Orientation)\): Crystallographic orientation of the alloy using either hkl values or L for longintudinal or T for Transverse. When inputing hkl value use the format [h,k,l]