Initial stress

Average stress

Stress (asymmetric)

20˚C & 40˚C

−192.4

−173.2

−178.3/−169.3

−153.0

20˚C & 60˚C

−192.4

−166.0

−170.5/−165.0

−139.6

20˚C & 80˚C

−192.4

−135.5

−145.7/−141.0

−78.6