671017.pdf

Mask

(a) Rigid boundary (b) Flexible boundary

Figure 9: Definition of masks to calculate the stresses inside the specimen.

[t!]

3. 5


4. 0


5. 5


6. 0


7. 0


8. 5

0 2 4 6 8 10 12 14 16

1 (%)

Rigid boundary A

Rigid boundary B

Flexible boundary

/ 1

measured 3

by

mask

(a)

3. 5


4. 0


5. 5


6. 0


7. 0


8. 5

0 246810121416

1 (%)

Rigid boundary A

Rigid boundary B

Flexible boundary

/ 1

measured 3

by

mask

(b)

3. 5


4. 0


5. 5


6. 0


7. 0


8. 5

0 2 4 6 8 10 12 14 16

1 (%)

Rigid boundary A

Rigid boundary B

Flexible boundary

/ 1

3

measured

by

mask

(c)

3. 5


4. 0


5. 5


6. 0


7. 0


8. 5

0 2 4 6 8 10 12 14 16

1 (%)

Rigid boundary A

Rigid boundary B

Flexible boundary

/ 1

3

measured

by

mask

(d)

Figure 10: The development of “real” stress ratio휎 1 /휎 3 with axial strain휀 1 for three different boundary conditions: (a)훿=0∘,(b)훿=30∘,
(c)훿=60∘,and(d)훿=90∘.The휎 1 and휎 3 are measured inside the specimen by defining a mask.