Issue 46

W. Song et alii, Frattura ed Integrità Strutturale, 46 (2018) 94-101; DOI: 10.3221/IGF-ESIS.46.10 98 Figure 3 : Load-carrying cruciform plate/joints specimen sizes and fatigue tests[10]. Specimens Stress range (MPa) Fatigue life Fracture location Specimens Stress range (MPa) Fatigue life Fracture location Sp1 400 21500 Weld toe Sp13 120 429300 Weld toe Sp2 360 37800 Weld toe Sp14 160 157400 Weld toe Sp3 320 46800 Weld toe Sp15 300 118800 Weld toe Sp4 280 56580 Weld toe Sp16 320 73200 Weld toe Sp5 240 129600 Weld toe Sp17 305 28700 Weld toe Sp6 200 224700 Weld toe Sp18 305 53500 Weld toe Sp7 240 327400 Weld toe Sp19 100 320500 Weld root Sp8 400 15200 Weld toe Sp20 120 184500 Weld root Sp9 360 47000 Weld toe Sp21 120 156900 Weld root Sp10 280 160700 Weld toe Sp22 150 41400 Weld root Sp11 180 95000 Weld toe Sp23 150 54190 Weld root Sp12 150 204100 Weld toe Sp24 180 75450 Weld root Specimens Stress range (MPa) Fatigue life Fracture location Specimens Stress range (MPa) Fatigue life Fracture location Q345-Sp1 130 214500 Weld toe Q345-Sp14 90 608738 Weld toe Q345-Sp2 130 612100 Weld root Q345-Sp15 90 538695 Weld toe Q345-Sp3 130 206234 Weld root Q345-Sp16 80 256961 Weld root Q345-Sp4 120 602991 Weld toe Q345-Sp17 80 328896 Weld toe Q345-Sp5 120 460568 Weld toe Q345-Sp18 80 294796 Weld root Q345-Sp6 120 323194 Weld toe Q345-Sp19 80 810030 Weld toe Q345-Sp7 120 343144 Weld root Q345-Sp20 80 552986 Weld toe Q345-Sp8 110 482628 Weld root Q345-Sp21 70 962772 Weld toe Q345-Sp9 110 523176 Weld toe Q345-Sp22 70 1488320 Weld toe Q345-Sp10 110 602503 Weld toe Q345-Sp23 70 1088900 Weld root Q345-Sp11 100 548100 Weld root Q345-Sp24 60 677008 Weld root Q345-Sp12 100 674549 Weld root Q345-Sp25 60 2296250 Weld root Q345-Sp13 90 632400 Weld root Q345-Sp26 60 2085860 Weld root Specimens Stress range (MPa) Fatigue life Fracture location Specimens Stress range (MPa) Fatigue life Fracture location AISI 304L-Sp1 260 438000 Weld root AISI 304L-Sp8 170 315000 Weld root AISI 304L-Sp2 230 744000 Weld root AISI 304L-Sp9 150 1100000 Weld root AISI 304L-Sp3 210 1090000 Weld root AISI 304L-Sp10 130 1980000 Weld root AISI 304L-Sp4 210 240000 Weld root AISI 304L-Sp11 150 116000 Weld root AISI 304L-Sp5 170 1260000 Weld root AISI 304L-Sp12 130 2510000 Weld root AISI 304L-Sp6 150 1840000 Weld root AISI 304L-Sp13 110 983000 Weld root AISI 304L-Sp7 190 227000 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.