PSI - Issue 21

Serhat Onur Çakmak et al. / Procedia Structural Integrity 21 (2019) 224–232 Serhat Onur C¸ akm k, T ncay Yalc¸inkaya / St u tur l Integrity Proced a 00 (2019) 000–000

229

6

(Avg: 75%) S, Mises

100.00 275.00 450.00 625.00 800.00 975.00 1150.00 1325.00 1500.00 1675.00 1850.00 2025.00 2200.00 3676.00

(a)

(b)

(c)

(d)

(Avg: 75%) S, Mises

100.00 275.00 450.00 625.00 800.00 975.00 1150.00 1325.00 1500.00 1675.00 1850.00 2025.00 2200.00 76.60 3942.68

(e)

(f)

(g)

(h)

Fig. 3: Von Mises stress distribution for di ff erent morphology and volume fraction (a-d) morph1, (e-h) morph2 and (a,e) VF15, (b,f) VF19, (c,g) VF28, (d,h) VF37

700

1000

900

600

800

500

700

600

400

500

300

400

300

200 Stress[MPa]

Stress[MPa]

200

100

0 Strain VF37−Morph1−OriSet1 VF37−Morph2−OriSet1 Fig. 4: Engineering stress-strain response of VF15 (left) and VF37 (right) for di ff erent martensite distributions. 0 0.05 0.1 Strain VF15−Morph1−OriSet1 VF15−Morph2−OriSet1 0.15 0.2 0 100 0 0.05 0.1 0.15

sets of all DP steel specimens. Figure 7(a)-(d) shows the shear band formation at the onset of necking through oriset-1 while Figure 7(e)-(h) shows the shear band formation at the onset of necking through oriset-2. These figures should be compared with the necking results presented in Figure 5. As the necking location depends on the orientation set