Issue 59

M. Gaci, Frattura ed Integrità Strutturale, 59 (2022) 444-460; DOI: 10.3221/IGF-ESIS.59.29

of all the martensitic plates formed after transformation. Each plate consists of (N) triangular element marked with a distinct color. The geometric characteristics of the plates, such as the number of elements and the shear direction ( α ) are given in Tab. 2. In order to achieve a satisfactory simulation of the TRIP phenomenon, the formation domain is constituted of martensitic plates having several lengths and shear direction ( α ). Martensitic plates are classified into three categories according to their number of triangular elements. long plates (N° : 41,42,43,59,60 and 64) contain between 26 and 32 triangular elements, medium plates (N° : 44, 45, 61, 62, 63, 38, 46, 51, 16, 80, 25, 31, 37, 55, 92, 93, 94, 102, 103 and 104) composed of 12 to 24 elements and the short plates formed of less than 12 elements, see Tab. 2 .

Number of elements

Shear direction of plates ( α )

Number of elements

Shear direction of plates ( α )

Shear direction of plates ( α )

N° of plates

N° of plates

N° of plates

Number of elements

1 2 3 4 5 6 7 8 9

160° 340° 160° 340° 160° 120° 150° 150° 160° 330°

38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74

260°

75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99

30° 30°

2 5 7 7 6 5 6 8 3 2 9 2 8 7 6 1 5 1 6 6 5 4 3 2 9 7 5 2 8 5 3 1

12

8 7 7 8 9 4 5 9 1 2 2 2 2 2 3 4

80°

7 3

260° 340° 340° 160° 160° 340° 150° 330° 160° 340° 110° 290° 290°

210° 210° 210° 150° 150° 330° 30°

32 31 27 23 19 14 10

12

80°

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37

50° 30° 60°

260°

7 4 5 7 2

80°

260° 260°

240°

12

50°

80°

230°

80° 60°

260°

60°

80°

16 12

240°

240° 240°

340° 340° 160° 340° 150° 340° 160° 340° 160° 170°

16 14 18 14 11

60°

8 4 1

240°

60° 30°

50°

230°

110° 110° 290° 290° 120° 300°

33 26 20 20 24 35

60° 30° 30°

9 7 6 5 2

14 11

240°

100 101 102 103 104 105 106 107 108 109 110

60°

240°

10°

50° 50°

3 2 3 5 6 5 5 6 7 6

16 15 13 11 10

50° 50°

190°

10°

230° 230°

170° 350° 170° 350° 150° 330°

190°

15 11

10°

50° 50° 50°

190°

9 6 3 1

10°

190°

230° 230°

10°

80°

30° Table 2: Martensitic plates characteristic

16

448