An Experimental and Numerical Study of Deformation and Decohesion Mechanisms During Peel Testing of a Laminate Packaging Material

Forskningsoutput: KonferensbidragKonferensabstract

Abstract

The material used in packages for the food and dairy industries comprise multiple laminate layers, each serving
different purposes in preserving and protecting the package content and by providing the appropriate package
rigidity during handling. Already during package manufacturing and filling, the package material is subject to large
deformations and a range of thermal and chemical processes that sometimes cause delamination between the
laminate layers. This, in turn, can lead to a reduced product shelf lifetime and unsatisfactory package performance.
In addition, controlled delamination can also be a required material property, for example in the case of package
folding or opening mechanisms. Aspects like these emphasize a great need for increased understanding of
adhesion and for the ability to predict adhesion properties of different packaging materials and under different
handling conditions. In order to quantify the delamination strength, more or less standardized peel tests are often
employed. In such tests, a laminate layer is partly separated to provide the peel arm which is pulled off from the
substrate layer(s) at a constant angle. The required peel force is measured along with the peel arm deformation
and provides a measure of the delamination strength of the laminate package material. However, the measured
force is not only the force component required to separate the layers, but it is also due to deformation of the peel
arm and possibly also additional deformation mechanisms in the substrate layer(s). Therefore, not only the
cohesive bond between individual laminate layers, but also the properties of the individual laminate layers
themselves must be properly characterized. In the present work, peel test experiments have been conducted and
the peel force and displacement as well as the peel arm geometry have been monitored. The same peel test has
also been studied by numerical simulations using a cohesive zone modeling framework. The influence of the
cohesive model formulation and the choice of constitutive model for the peel arm material are investigated in
relation to the experimental observations and different delamination mechanisms are observed.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • Tetra Pak AB
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Teknisk mekanik
Originalspråkengelska
StatusPublished - 2018
PublikationskategoriForskning
Peer review utfördJa
EvenemangThe 13th World Congress on Computational Mechanics - Marriott Marquis, New York, USA
Varaktighet: 2018 jul 222018 jul 28
Konferensnummer: 13
http://www.wccm2018.org/
http://www.wccm2018.org/

Konferens

KonferensThe 13th World Congress on Computational Mechanics
Förkortad titelWCCM XIII
LandUSA
OrtNew York
Period2018/07/222018/07/28
Internetadress

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