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Aluminum laminates are among the main components of beverage packaging. These layered material systems are coupled to paperboard plies except in the cap opening area, where the human force limit sets a requirement on the material properties to allow open-ability and the mechanical characteristics are of particular interest. Experimental investigations have been carried out on this composite and on its components by either traditional or full-field measurement techniques. The interpretation of the collected data has been supported by the simulation of the performed tests considering either a homogenized material model or the individual laminate layers. However, different results may be recovered from similar samples due to physical factors like the material processing route and the embedded defectiveness. In turn, the conclusions may vary depending on the model assumptions. This contribution focuses on the physical effects and on the modeling of the large localized deformation induced by material singularities. This topic is discussed at the light of some experimental results.

A combined experimental and numerical analysis of the mechanical response of the thin aluminum foils employed in beverage packaging has been performed using 3D digital image correlation and non-linear finite element techniques. The present contribution focuses on the significant amount of out-of-plane displacements that develop in tensile tests as fracture propagates across the investigated specimens. The influence of this phenomenon on the actual failure mode of the considered metal samples is further discussed

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