Numerical simulation of the bearing failure mechanism of thin-ply metal laminates

Citation
In: Brian Falzon, Conor McCarthy (Eds.): ICCM23: proceedings of the 2023 International Conference on Composite Materials (2023)
Contribution to Conference
23rd International Conference on Composites Materials, ICCM 2023  
Publisher Link
https://www.iccm-central.org/Proceedings/ICCM23proceedings/papers/ICCM23_Full_Paper_150.pdf
Scopus ID
2-s2.0-85187543649
Publisher
International Committee on Composite Materials
Within this study, the influence of a local hybridisation of Thin- and Thick-Ply laminates under bearing conditions was investigated by numerical simulations. The hybridisation was carried out by substituting 90° layers with stainless steel patches locally in the area of the load introduction. The stainless steel patches or foils had the same thickness as the prepreg layers. This prevents any unintentional change or disturbance of the laminate geometries. The CompDam - Deformation Gradient Decomposition (DGD) damage model was chosen for the numerical investigations. The study results showed that a reduction in layer thickness is associated with increased bearing strength. The bearing strength improvement of hybrid specimens is significantly higher for Thin- and Thick-Ply specimens. An improvement of almost 50 % could be achieved. Fibre kinking led to final failure for all configurations. The initiation of fibre kinking occurred in the 0° layers, which has the highest compressive stress. However, it could be observed that using stainless steel patches reduces the maximum compressive stress in the middle 0° layer. Thus, the initiation of fibre kinking shifted to higher strains or stresses, resulting in a higher bearing strength.
Subjects
Bolt Connection
FEM
Fibre Metal Laminates
Hybrid Composites
Thin-Ply
DDC Class
620: Engineering
660: Chemistry; Chemical Engineering