Crack Paths 2012

Deflection and twisting angles were measured on S E Mstereo images for each modeand

¦ i i n D D 1 and

specimen type. They are presented in Table 1 as the mean value

D D

standard deviation

s

( ) 1 / ( 1 [ ¦ i i

n . Frequencies of each angle range are

D

21])

presented in the histograms in Fig. 4 where the angles D and E , loading mode (II or III)

and specimen type are distinguished.

M o d eII, parallel to shear

Fe II S Fe II C AusII S

0,50

0,45

0,40

0,35

0,30

0,25

0,20

0,15

0,10

0,05

0,00

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 8 5 9 0 [ ° ] DDI

M o d eII, parallel to shear

FeIII S FeIII T Aus III S

0,35

0,30

0,25

0,20

0,15

0,10

0,05

0,00

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 8 5 9 0 [ ° ] DII

M o d eI, perpendiculartoshear

Fe II S Fe II C Aus II S

0,50

0,45

0,40

0,35

0,30

0,25

0,20

0,15

0,10

0,05

0,00

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90[°] EI

Fe III S Fe III T Aus III S

M o d eII, perpendicularto shear

0,30

0,25

0,20

0,15

0,10

0,05

0,00

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90[°] EII

Figure 4. Frequencies of crack deviation angles with respect to the shear plane.

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