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- Ståhle, P.Lund University,Lunds universitet,Hållfasthetslära,Institutionen för byggvetenskaper,Institutioner vid LTH,Lunds Tekniska Högskola,Solid Mechanics,Department of Construction Sciences,Departments at LTH,Faculty of Engineering, LTH (author)
Fracture of a Thin Laminated Foil
- Article/chapterEnglish2014
Publisher, publication year, extent ...
- 2014
- 12 s.
- electronicrdacarrier
Numbers
- LIBRIS-ID:oai:lup.lub.lu.se:de9b64ae-262c-4865-8aeb-1c0ba4f95655
- https://lup.lub.lu.se/record/de9b64ae-262c-4865-8aeb-1c0ba4f95655URI
Supplementary language notes
- Language:English
- Summary in:English &Swedish
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- SwePubSwePub
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Notes
- The micro-mechanisms of fracture in a laminate composed of an aluminium foil and a polyethene film are considered. Thelaminate as well as the freestanding layers were fracture mechanically tested. Inspection of the broken cross-sections shows thatfracture 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 aresuccessfully used to derive the work of failure. An accurate prediction of the fracture toughness is made for the aluminium foil andthe laminate. Even though the toughness of the freestanding polyethene film could not be accurately determined by the theory, itsrole as a member of the laminate is predicted by the theory with great accuracy. It is shown that the load carrying capacity of thelaminate is many times larger than the added load carried by the freestanding layers. The study further indicates that necking maybe impeded which may increase the toughness several times. It is also shown how the laminate may be forced to produce multiplenecking with a significantly improved toughness as a result.
- 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.
Subject headings and genre
- NATURVETENSKAP Fysik hsv//swe
- NATURAL SCIENCES Physical Sciences hsv//eng
- NATURVETENSKAP Matematik hsv//swe
- NATURAL SCIENCES Mathematics hsv//eng
Added entries (persons, corporate bodies, meetings, titles ...)
- Andreasson, E.Tetra Pak AB (author)
- Kao-Walter, S.Blekinge Institute of Technology (author)
- HållfasthetsläraInstitutionen för byggvetenskaper (creator_code:org_t)
Related titles
- In:Procedia Materials Science : 20th European Conference on Fracture (ECF20) - 20th European Conference on Fracture (ECF20)
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