Micro-mechanisms of a laminated packaging material during fracture
2014 (English)In: Engineering Fracture Mechanics, ISSN 0013-7944, E-ISSN 1873-7315, Vol. 127Article in journal (Refereed) PublishedAlternative title
Micro-mechanisms of a laminated packaging material during fracture (Swedish)
The micro-mechanisms of fracture in a laminate composed of an aluminium foil and a polymer film are considered in this study. The laminates as well as the individual layers, with and without premade centre-cracks, were tensile tested. Visual inspection of the broken cross-sections shows that failure occurs through localised plasticity. This leads to a decreasing and eventually vanishing cross-section ahead of the crack tip for both the laminate and their single constituent layers. Experimental results are examined and analysed using a slip-line theory to derive the work of failure. An accurate prediction was made for the aluminium foil and for the laminate but not for the freestanding polymer film. The reason seems to be that the polymer material switches to non-localised plastic deformation with significant strain-hardening.
Place, publisher, year, edition, pages
Elsevier , 2014. Vol. 127
Aluminium, Laminate, Polymer, SEM, Toughness
IdentifiersURN: urn:nbn:se:bth-6600DOI: 10.1016/j.engfracmech.2014.04.017ISI: 000341551700023Local ID: oai:bth.se:forskinfo896ACA1E962E694BC1257D61006E5B27OAI: oai:DiVA.org:bth-6600DiVA: diva2:834118