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Micro-mechanism of Thin and Laminated Packaging Material during Fracture
Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
2012 (English)Conference paper (Refereed) Published
Abstract [en]

Fracture path of a polymer coated and uncoated aluminium foil (about 6-7 um) is followed in a Scanning Electron Microscope. The crack length and applied load were measured during crack initiation and growth. The specimens’ cross section were then studied using the optical profilometric method to exam the deformed surface. For the uncoated Al-foil, no fracture surface can be observed. Fracture seems to occur through so-called necking. This behaviour was successfully modelled by a modified strip yield model. It leads to a conclusion that the crack tip is preceded a substantial plastic zone as compared with the crack length. The result was then compared to a polymer coated Al-foil. Further more, similar experimental works were performed on a polymer coated and uncoated Polypropylene. The results were discussed and compared to the cases with Al-foil layer.

Place, publisher, year, edition, pages
Oxford: Mansfield College, Oxford , 2012.
Keyword [en]
Fracture path, aluminum foil, packaging, laminate, modified strip yield model.
National Category
Applied Mechanics
URN: urn:nbn:se:bth-7085Local ID: diva2:834666
8th Meeting of TC2 on Micromechanisms of the European Structural Integrity Society (ESIS TC2))
Available from: 2012-12-12 Created: 2012-12-10 Last updated: 2015-06-30Bibliographically approved

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Kao-Walter, SharonAndreasson, Eskil
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