Fracture of a Thin Laminated Foil

P. Ståhle, E. Andreasson, S. Kao-Walter

Forskningsoutput: Kapitel i bok/rapport/Conference proceedingKonferenspaper i proceedingPeer review

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The micro-mechanisms of fracture in a laminate composed of an aluminium foil and a polyethene film are considered. The laminate as well as the freestanding layers were fracture mechanically tested. Inspection of the broken cross-sections shows that fracture occurs through necking, i.e., localised plastic deformation leading to a decreasing and eventually vanishing cross-section. This occurs ahead of the crack tip for both freestanding layers and the laminate. The plastic properties and a slip-line theory are successfully used to derive the work of failure. An accurate prediction of the fracture toughness is made for the aluminium foil and the laminate. Even though the toughness of the freestanding polyethene film could not be accurately determined by the theory, its role as a member of the laminate is predicted by the theory with great accuracy. It is shown that the load carrying capacity of the laminate is many times larger than the added load carried by the freestanding layers. The study further indicates that necking may be impeded which may increase the toughness several times. It is also shown how the laminate may be forced to produce multiple necking with a significantly improved toughness as a result.
Titel på värdpublikationProcedia Materials Science
Undertitel på värdpublikation20th European Conference on Fracture (ECF20)
Antal sidor12
StatusPublished - 2014
EvenemangThe 20th European Conference on Fracture - Trondheim, Norge
Varaktighet: 2014 juni 302014 juli 4
Konferensnummer: 20


KonferensThe 20th European Conference on Fracture
Förkortad titelECF20

Bibliografisk information

M1 - 20

Ämnesklassifikation (UKÄ)

  • Fysik
  • Matematik


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