Issue 46

W. Song et alii, Frattura ed Integrità Strutturale, 46 (2018) 94-101; DOI: 10.3221/IGF-ESIS.46.10

Figure 3 : Load-carrying cruciform plate/joints specimen sizes and fatigue tests[10].

Stress range (MPa)

Fracture location Weld toe Weld toe Weld toe Weld toe Weld toe Weld toe Weld toe Weld toe Weld toe Weld toe Weld toe Weld toe Fracture location Weld toe Weld root Weld root Weld toe Weld toe Weld toe Weld root Weld root Weld toe Weld toe Weld root Weld root Weld root Fracture location Weld root Weld root Weld root Weld root Weld root Weld root

Stress range (MPa)

Fracture location Weld toe Weld toe Weld toe Weld toe Weld toe Weld toe Weld root Weld root Weld root Weld root Weld root Weld root Fracture location Weld toe Weld toe Weld root Weld toe Weld root Weld toe Weld toe Weld toe Weld toe Weld root Weld root Weld root Weld root Fracture location Weld root Weld root Weld root Weld root Weld root Weld root

Specimens

Fatigue life

Specimens

Fatigue life

Sp1 Sp2 Sp3 Sp4 Sp5 Sp6 Sp7 Sp8 Sp9

400 360 320 280 240 200 240 400 360 280 180 150 130 130 130 120 120 120 120 110 110 110 100 100 260 230 210 210 170 150 190 90

21500 37800 46800 56580 129600 224700 327400 15200 47000 160700 95000 204100 214500 612100 206234 602991 460568 323194 343144 482628 523176 602503 548100 674549 632400 438000 744000 1090000 240000 1260000 1840000 227000

Sp13 Sp14 Sp15 Sp16 Sp17 Sp18 Sp19 Sp20 Sp21 Sp22 Sp23 Sp24

120 160 300 320 305 305 100 120 120 150 150 180

429300 157400 118800 73200 28700 53500 320500 184500 156900 41400 54190 75450 608738 538695 256961 328896 294796 810030 552986 962772 1488320 1088900 677008 2296250 2085860 315000 1100000 1980000 116000 2510000 983000

Sp10 Sp11 Sp12

Stress range (MPa)

Stress range (MPa)

Specimens Q345-Sp1 Q345-Sp2 Q345-Sp3 Q345-Sp4 Q345-Sp5 Q345-Sp6 Q345-Sp7 Q345-Sp8 Q345-Sp9 Q345-Sp10 Q345-Sp11 Q345-Sp12 Q345-Sp13 Specimens

Fatigue life

Specimens Q345-Sp14 Q345-Sp15 Q345-Sp16 Q345-Sp17 Q345-Sp18 Q345-Sp19 Q345-Sp20 Q345-Sp21 Q345-Sp22 Q345-Sp23 Q345-Sp24 Q345-Sp25 Q345-Sp26 Specimens

Fatigue life

90 90 80 80 80 80 80 70 70 70 60 60 60

Stress range (MPa)

Stress range (MPa)

Fatigue life

Fatigue life

AISI 304L-Sp1 AISI 304L-Sp2 AISI 304L-Sp3 AISI 304L-Sp4 AISI 304L-Sp5 AISI 304L-Sp6 AISI 304L-Sp7

AISI 304L-Sp8 AISI 304L-Sp9 AISI 304L-Sp10 AISI 304L-Sp11 AISI 304L-Sp12 AISI 304L-Sp13

170 150 130 150 130 110

Weld root Table 1 : Fatigue test results of 10CrNi3MoV[10], Q345Qd [15] and AISI 304L [16] steel LCWJ.

Before fatigue tests, the LCWJ geometrical profile obtained by image scanner were measured by CAD software. 24 specimens in total were measured and tested. The specimens with zero penetration at weld root is processed by wire electrode method. The fatigue test data and fatigue failure locations were summarized in Tab. 1. Due to the difference of weld penetration in LCWJ, the fatigue failure modes were different. On the other hand, the fatigue test data of Q345qD and AISI 304L steel LCWJ from [15,16] has been collected for the analysis in this study, which are shown in Tab. 1.

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