Fatigue Crack Paths 2003

as a function of an effective stress intensity factor range

e f f K Δ in the following form

da

n

eff K C Δ =

(7)

dN

F

Section

B

Cracked

a

area

H

F

R

θ

t

Figure 3. Clamped-clamped cracked circular arch under a pulsating force.

UncrackedArch

CrackedArch

Crackedsection

Unrackedsection

a/H=0,45

a)

d)

CrackedArch

CrackedArch

Crackedsection

Crackedsection

a/H=0,6

a/H=0,15

b)

e)

CrackedArch

Crackedsection a/H=0,3

c)

f)

Figure 4. Bending momentredistribution due to crack growing.