PSI - Issue 28

N. Alanazi et al. / Procedia Structural Integrity 28 (2020) 886–895 N. Alanazi & L. Susmel/ Structural Integrity Procedia 00 (2019) 000–000

891

6

  2 L Z 

1

  Z 

 

0 

   (10) where σ � ��� is the normal linear-elastic stress perpendicular to the focus path (see Figure 3), r is the rectilinear coordinate parallel to the focus path, and ���� � is determined according to Eq. (7). a b c 2 eff n r dr L Z    Line Method

12 15 18 21 24

12 15 18 21 24

12 15 18 21 24

±30% scatter band

Best fitted power law

σ p (MPa)

0 3 6 9

σ p (MPa)

0 3 6 9

σ f (MPa)

0 3 6 9

Intermediate (ρ = 0)

Blunt (ρ = 0)

Plain (ρ = 0)

0.1 Δ� �

0.001 0.01

1

10

100

0.1 Δ� �

0.1 Δ� �

0.001 0.01

1

10

100

0.001 0.01

1

10

100

(mm/s)

(mm/s)

(mm/s)

d

e

f

10 15 20 25 30 35 40 45 50 55

12 15 18 21 24

12 15 18 21 24

σ p (MPa)

σ p (MPa)

σ p (MPa)

0 3 6 9

0 3 6 9

0 5

Sharp (ρ = 0)

Blunt (ρ = 0.18)

Intermediate (ρ = 0.18)

0.1 Δ� �

0.1 Δ� �

0.1 Δ� �

0.001 0.01

1

10

100

0.001 0.01

1

10

100

0.001 0.01

1

10

100

(mm/s)

(mm/s)

(mm/s)

g

h

i

5 10 15 20 25 30 35 40 45 50 55

12 15 18 21 24

12 15 18 21 24

σ p (MPa)

0 3 6 9

σ p (MPa)

σ p (MPa)

0 3 6 9

Intermediate (ρ =0.3)

Sharp (ρ = 0.18)

Blunt (ρ =0.3)

0.1 Δ� �

0.1 Δ� �

0.1 Δ� �

0.001 0.01

1

10

100

0.001 0.01

1

10

100

0.001 0.01

1

10

100

(mm/s)

(mm/s)

(mm/s)

j

10 15 20 25 30 35 40 45 50 55

σ p (MPa)

0 5

Sharp (ρ =0.3)

0.1 Δ� �

0.001 0.01

1

10

100

(mm/s)

Fig. 4 Generated results of the un-notched (a) and notched specimens (b-j).

4. Experimental details and results The accuracy of the new extension of the TCD being proposed was checked by generating a large number of experimental results. In more detail, symmetric and asymmetric bending tests were carried on beams having 100 mm X 100 mm square section and 500 mm long. Both unnotched and notched specimens had 50 mm net nominal depth.