PSI - Issue 58

Mikkel L. Larsen et al. / Procedia Structural Integrity 58 (2024) 73–79

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M.L. Larsen et al. / Structural Integrity Procedia 00 (2024) 000–000

3

Pinned connections

Support structure

a) 3D overview.

b) Real setup.

Fig. 2. a) 3D overview of test setup and b) real manufactured setup.

NP 4

L11

G11-R-1-2-3 Opp.: G5

G2 Opp.: G6

L1 L2

NP 1

Opp.: L7+L8

G10 Opp.: G12-R-1-2-3

NP 2

G15-R1-2-3

L3 L4-R1-2-3

G1 Opp.: G4

L5 L6

G13-R1-2-3 Opp.: G8

G3 Opp.: G7

G9 Opp.: G14-R1-2-3

L9 L10-R1-2-3

NP 3

Fig. 3. Strain gauge plan. ”G” denotes global gauges, ”L” denotes local gauges and ”NP” denotes locations used for the non-proportionality analysis.

3. Finite element model

A digital twin of the lifting arm is developed using finite element modelling. The model is developed using ANSYS Workbench 2022 and is shown in Fig. 4. The FE model is modelled linear with Young’s modulus of 210 GPa and Poissons ratio of 0.3, as the loads applied will not result in stresses above yield or any excessive deformation. The FE model is meshed in accordance with the guidelines from the IIW (Hobbacher (2016)) for hot-spot stresses. A convergence study has been performed to validate the mesh. In total 1,026,250 second-order elements have been used, corresponding to 1,820,113 nodes.

Cylindrical joint

Fixed support

Fig. 4. FE model with boundary conditions.