Fracture of a Thin Laminated Foil
(2014) The 20th European Conference on Fracture- Abstract
- 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... (More)
- 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. (Less)
- Abstract (Swedish)
- 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... (More)
- 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. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/de9b64ae-262c-4865-8aeb-1c0ba4f95655
- author
- Ståhle, P. LU ; Andreasson, E. and Kao-Walter, S.
- organization
- publishing date
- 2014
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- Procedia Materials Science : 20th European Conference on Fracture (ECF20) - 20th European Conference on Fracture (ECF20)
- pages
- 12 pages
- publisher
- Elsevier
- conference name
- The 20th European Conference on Fracture
- conference location
- Trondheim, Norway
- conference dates
- 2014-06-30 - 2014-07-04
- language
- English
- LU publication?
- yes
- additional info
- M1 - 20
- id
- de9b64ae-262c-4865-8aeb-1c0ba4f95655
- date added to LUP
- 2019-06-17 16:24:11
- date last changed
- 2019-12-11 09:36:58
@inproceedings{de9b64ae-262c-4865-8aeb-1c0ba4f95655,
abstract = {{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.}},
author = {{Ståhle, P. and Andreasson, E. and Kao-Walter, S.}},
booktitle = {{Procedia Materials Science : 20th European Conference on Fracture (ECF20)}},
language = {{eng}},
publisher = {{Elsevier}},
title = {{Fracture of a Thin Laminated Foil}},
url = {{https://lup.lub.lu.se/search/files/67249876/Manus_ECF20v2.pdf}},
year = {{2014}},
}