Crack Paths 2006

] , [ 3 1 0 0 M P a c V

)

room temperature

(

E

],[8.111

K M P a IC

] [ 2 5 . 1 0 3 . 1 m M P a

loaded so to produce a mixed mode state at the notch tip. Different asymmetries in the

loading allows generating different modemixity ratios (Figure 2).

Figure 2: Pictures of the cracks at the

0 315 V-notch tip 3PBP M M Aspecimens

Figures 3 and 4 show the experimental and prediction crack initiation angle and critical

load.

90

7805

80

75

65

angle - experiment

Crack initiation

)Predicted crack

initiation angle. (

60

A2/A1

55

0.0726

0.1726

0.2726

0.3726

0.4726

0.5726

0.6726

Figure 3: Crack initiation angle for the P M M sApecimens experimental and prediction