PSI - Issue 54
Luís D.C. Ramalho et al. / Procedia Structural Integrity 54 (2024) 390–397 Lu´ıs D.C. Ramalho et al. / Structural Integrity Procedia 00 (2023) 000–000
395
6
10
10
L O = 12.5 mm FEM L O =25mmFEM L O =50mmFEM L O = 12.5 mm RPIM L O = 25 mm RPIM L O = 50 mm RPIM L O = 12.5 mm NNRPIM L O = 25 mm NNRPIM L O = 50 mm NNRPIM
L O = 12.5 mm FEM L O =25mmFEM L O =50mmFEM L O = 12.5 mm RPIM L O = 25 mm RPIM L O = 50 mm RPIM L O = 12.5 mm NNRPIM L O = 25 mm NNRPIM L O = 50 mm NNRPIM
9
9
8
8
7
7
6
6
5
5
4 Force (kN)
4 Force (kN)
3
3
2
2
1
1
0
0
0
0.1
0.2
0.3
0.4
0.5
0
0.1
0.2
0.3
0.4
0.5
u x (mm)
u x (mm)
(a)
(b)
100
45
L O = 12.5 mm FEM L O =25mmFEM L O =50mmFEM L O = 12.5 mm RPIM L O = 25 mm RPIM L O = 50 mm RPIM L O = 12.5 mm NNRPIM L O = 25 mm NNRPIM L O = 50 mm NNRPIM
L O = 12.5 mm FEM L O =25mmFEM L O =50mmFEM L O = 12.5 mm RPIM L O = 25 mm RPIM L O = 50 mm RPIM L O = 12.5 mm NNRPIM L O = 25 mm NNRPIM L O = 50 mm NNRPIM
90
40
80
35
70
30
60
25
50
τ xy max (MPa)
20 τ xy max (MPa)
40
15
30
10
20
5
10
0
0
0
0.1
0.2
0.3
0.4
0.5
0
0.1
0.2
0.3
0.4
0.5
u x (mm)
u x (mm)
(c)
(d)
Figure 5: Evolution of the force (a) in the Araldite ® AV138 joints (b) and in the Sikaforce ® 7752 joints; Evolution of the maximum τ xy in (c) in the Araldite ® AV138 joints (d) and in the Sikaforce ® 7752 joints
14
AV138 FEM AV138 RPIM AV138 NNRPIM AV138 Exp. 7752 FEM 7752 RPIM 7752 NNRPIM 7752 Exp.
12
10
8
6
Maximum Load (kN)
4
2
0
12.5
25
37.5
50
L O (mm)
Figure 6: Strength prediction using the maximum τ xy criterion
4. Conclusion
In this work two di ff erent meshless methods, the RPIM and the NNRPIM, were used to analyse a SLJ under an impact load. The two meshless methods were validated for this type of application since the stress fields in the adhesive mid-thickness line are similar between the two meshless methods and the FEM. Furthermore, The strength predictions are also similar for the three numerical methods. The criterion used, the maximum τ xy , under predicts joint strength under impact, similarly to what happens in static analysis. Joint strength also seems to increase with increased to the L O , this is also predicted by the criterion used but to a lesser degree.
Made with FlippingBook. PDF to flipbook with ease