PSI - Issue 46

A. Wetzel et al. / Procedia Structural Integrity 46 (2023) 10–16 Anna Wetzel et al. / Structural Integrity Procedia 00 (2019) 000–000

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Detail A

Fig. 4. Finite element model of the stranding process. Detail A shows the meshing technique in the transition region between two of the three parts of one outer wire in the undeformed state. The legend shows the v. Mises stress and is limited to the yielding limit R p of the outer wires.

3.2. Load cases The advantage of the three-part wire model is the possibility to import the fine-meshed middle section with uniform stress distribution in further simulations. The chosen length of the imported section is twice the length of lay, which adds up to 27.5 mm. For the validation of the model, simple load cases as tension, bending, and torsion are experimentally reproduced. After a springback analysis, the imported strand is exposed to those three load cases in individual explicit analyses as depicted in Fig. 5. The torsional moment is applied in the direction of lay.

Fig. 5. The imported middle section of the core strand after springback analysis. The legend shows the v. Mises stress. The boundary conditions for the three load cases are shown schematically. 4. Validation 4.1. Geometrical model of wire strand A three-dimensional (3D) geometrical model of the core strand, as used by Kastratović et al. (2014), is created with the computer-aided design (CAD) program Solidworks. This strand has the same dimensions as the one created by stranding simulation. The 3D model is imported to Abaqus to simulate the same load cases as for the stranded model. 4.2. Experimental tests For the experimental tests, the core strand of the 6x7 wire rope is extracted. Every experiment is done at least three times. All measuring lengths are 27.5 mm and therefore identical to the two FE-models.