CTOD Delta5 is a displacement of points
located 2.5 mm above and below crack tip at the specimen surface.
Java applet below transforms CTOD Delta5 to
CTOD DeltaBS and J-integral for CT and 3PB specimens (B/W = 0.5, a/W = 0.55).
Details are here.
Select specimen type, per cent of side
grooves, crack curvature Alpha and hardening power n.
Specify elasticity modulus E (MPa) and yield stress Sy (MPa).
Then specify Delta5 (mm)
and press ENTER. Each time you do this you have a line with three numbers: Delta5
(mm), DeltaBS (mm) and J/(2Sy) (mm).
