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Micro-mechanisms of a laminated packaging material during fracture

In English

Författare

Summary, in English

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. (C) 2014 Elsevier Ltd. All rights reserved.

Avdelning/ar

Publiceringsår

2014

Språk

Engelska

Sidor

313-326

Publikation/Tidskrift/Serie

Engineering Fracture Mechanics

Volym

127

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Physical Sciences
  • Mathematics
  • Applied Mechanics

Nyckelord

  • Aluminium
  • Laminate
  • Polymer
  • SEM
  • Toughness

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1873-7315