This appears to be a defect. Even after setting sint.ZeroThroughThicknessBendingStress=True, if I query the value it will still read False, even though the Details entry has changed to Yes.
Instead, Change the property by this method:
prop = sint.PropertyByName("ZeroThroughThicknessBendingStress")
prop.InternalValue = 1
You are navigating away from the AIS Discovery experience