Experimentelle und numerische Untersuchungen zum mechanischen Verhalten perforierter Aluminium‐Legierungen unter zyklischer Belastung

Experimental and numerical investigation of the mechanical behaviour of perforated aluminium alloys under cyclic loading The stiffness behaviour of perforated aluminium alloys under cyclic loading is examined in relation to the relative density. Different relative densities between 0.93 and 0.62 could be realized by modification of the hole spacing of the regular square penetration pattern. Unloading experiments were carried out for the determination of the stiffness change. The decrease of the gradient of the un‐ and reloading curves with increasing plastic deformation could be measured. The pore formation was verified exemplarily by using Scanning Electron Microscopy. The quantitative influence of a changing cell structure (size and shape) on the measured stiffness reduction was estimated by means of the Finite Element Method.