Generalized SCF Formula of Out-Of-Plane Gusset Welded Joints and Assessment of Fatigue Life Extension by Additional Weld
Abstract
:1. Introduction
2. Finite Element Analysis
2.1. The Geometric Model
2.2. The Finite Element Model for Welded Joints
3. The Proposed Parametric Formula for Gusset Welded Joints
3.1. Influence of Base Metal Geometry
3.2. Influence of Bead Geometry
- (1)
- Main plate length L_main/t: 60.0;
- (2)
- Attachment plate length L_attach/t: 18.0;
- (3)
- Attachment plate height H_attach/t: 8.0;
- (4)
- Main plate width W/t: 6.0–300.0;
- (5)
- Attachment thickness T/t: 0.3–2.0;
- (6)
- Bottom weld toe radius r1/t: 0.003–0.36;
- (7)
- Bottom weld toe angle θ1: 30°–90°;
- (8)
- Top weld toe radius r2/t: 0.043;
- (9)
- Top weld toe angle θ2: 60°;
- (10)
- Bottom weld leg length L1/t: 0.5–2.0;
- (11)
- Top weld leg length L2/t: 0.5–2.0;
- (12)
- Salient point position 1/n: 0.3;
- (13)
- Hump height H/t: 0.0–0.3.
3.3. Parametric Formulae of SCF
4. Fatigue Life Assessed by the Proposed Parametric Formulae
4.1. Extension to the Additional Weld
4.2. The Experiment Setup
4.3. The S-N Curve
4.4. The Geometric Effects
5. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
Appendix A
- (1)
- Gusset welded joints with single attachment under tensile stress:
- (2)
- Gusset welded joints with single attachment under bending stress:
- (3)
- Gusset welded joints with double attachments under tensile stress:
- (4)
- Gusset welded joints with double attachments under bending stress:
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- | Material | Yield Stress (MPa) | Tensile Stress (MPa) | Elongation (%) | Chemical Composition (%) | ||||
---|---|---|---|---|---|---|---|---|---|
C | Si | Mn | P | S | |||||
Plate | SMA490YA | 439 | 518 | 25 | 0.15 | 0.19 | 1.10 | 0.015 | 0.003 |
Gusset | SMA490YA | 453 | 569 | 22 | 0.16 | 0.37 | 1.40 | 0.015 | 0.003 |
Welding Wire | - | 495 | 572 | 28 | 0.05 | 0.54 | 1.51 | 0.014 | 0.010 |
Welding Method | Current (A) | Voltage (V) | Welding Speed (mm/min) | Heat Input (J/mm) |
---|---|---|---|---|
Fillet weld | 270 | 31 | 400 | 1256 |
Additional weld | 205 | 26 | 450 | 711 |
Condition | T/t | r1/t | θ1 | r2/t | θ2 | L1/t | L2/t | H/t | 1/n | W/t |
---|---|---|---|---|---|---|---|---|---|---|
B1 | 0.964 | 0.054 | 47.3° | 0.764 | 76.7° | 1.21 | 0.699 | 0.106 | 0.455 | 6.68 |
B2 | 0.972 | 0.087 | 56.1° | 0.564 | 84.7° | 1.21 | 0.693 | 0.116 | 0.460 | 6.68 |
B3 | 0.976 | 0.104 | 50.8 | 0.830 | 82.5 | 1.41 | 0.694 | 0.093 | 0.463 | 6.68 |
Number | t/mm | T/mm | r1/mm | θ1/° | L1/mm | L2/mm | H/mm | W/mm | Kt | Δσ |
---|---|---|---|---|---|---|---|---|---|---|
AW1 | 12.01 | 11.74 | 0.549 | 60.4 | 10.15 | 8.723 | 0.849 | 80.16 | 4.526 | 150 |
AW2 | 12.04 | 11.40 | 0.640 | 74.4 | 9.199 | 8.472 | 0.607 | 80.05 | 4.419 | 80 |
AW3 | 12.12 | 11.98 | 0.673 | 61.1 | 9.924 | 8.594 | 0.610 | 79.99 | 4.228 | 100 |
AW4 | 12.22 | 11.76 | 0.639 | 58.4 | 9.908 | 9.087 | 0.884 | 80.25 | 4.381 | 125 |
AW5 | 11.94 | 11.59 | 0.640 | 60.0 | 10.31 | 7.239 | 0.536 | 80.30 | 4.081 | 175 |
AW6 | 11.99 | 11.81 | 0.743 | 60.5 | 10.30 | 7.442 | 0.392 | 80.12 | 3.877 | 200 |
B1-1 | 11.80 | 11.77 | 1.143 | 50.8 | 14.20 | 7.771 | 1.568 | 80.15 | 3.192 | 150 |
B1-2 | 12.04 | 11.71 | 1.102 | 50.8 | 13.67 | 8.240 | 1.314 | 80.22 | 3.287 | 175 |
B1-3 | 12.02 | 11.59 | 0.653 | 47.3 | 14.57 | 8.402 | 1.277 | 80.35 | 3.772 | 200 |
B2-1 | 12.08 | 11.74 | 1.052 | 56.1 | 14.59 | 8.371 | 1.406 | 80.01 | 3.335 | 150 |
B2-2 | 12.04 | 11.72 | 1.207 | 41.5 | 17.42 | 7.623 | 1.329 | 80.12 | 2.948 | 175 |
B2-3 | 12.18 | 11.45 | 1.285 | 57.3 | 15.36 | 9.187 | 1.394 | 80.18 | 3.156 | 200 |
B3-1 | 12.10 | 11.80 | 1.512 | 41.6 | 17.02 | 9.043 | 1.234 | 80.21 | 2.865 | 150 |
B3-2 | 12.09 | 11.69 | 1.846 | 43.3 | 17.28 | 8.948 | 1.306 | 79.98 | 2.723 | 175 |
B3-3 | 12.03 | 11.74 | 1.249 | 50.8 | 16.94 | 8.351 | 1.122 | 80.15 | 3.019 | 125 |
B3-4 | 12.07 | 11.58 | 1.683 | 44.2 | 17.00 | 8.501 | 1.205 | 80.22 | 2.716 | 200 |
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Wang, Y.; Luo, Y.; Kotani, Y.; Tsutsumi, S. Generalized SCF Formula of Out-Of-Plane Gusset Welded Joints and Assessment of Fatigue Life Extension by Additional Weld. Materials 2021, 14, 1249. https://doi.org/10.3390/ma14051249
Wang Y, Luo Y, Kotani Y, Tsutsumi S. Generalized SCF Formula of Out-Of-Plane Gusset Welded Joints and Assessment of Fatigue Life Extension by Additional Weld. Materials. 2021; 14(5):1249. https://doi.org/10.3390/ma14051249
Chicago/Turabian StyleWang, Yixun, Yuxiao Luo, Yuki Kotani, and Seiichiro Tsutsumi. 2021. "Generalized SCF Formula of Out-Of-Plane Gusset Welded Joints and Assessment of Fatigue Life Extension by Additional Weld" Materials 14, no. 5: 1249. https://doi.org/10.3390/ma14051249