Micro-mechanisms of a laminated packaging material during fracture

Andreasson, Eskil; Kao-Walter, Sharon; Ståhle, Per

doi:10.1016/j.engfracmech.2014.04.017

Cited by 24 publications

(28 citation statements)

References 25 publications

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“…This phenomenon has been interpreted at the light of brittle or quasi-brittle fracture models in [2][3][4][5], consistently with the smaller rupture strain and meaningful reduction of toughness exhibited by free-standing thin metal foils compared to the corresponding bulk materials [6,7]. However, fractographical examinations reported in [8] suggest that the material separation may be rather produced by necking, in other words, by a typical elastic-plastic phenomenon.…”

Section: Figure 1 Typical Composition and Functionality Of Beverage mentioning

confidence: 81%

“…Strain localization can be observed also in polyethylene but at much larger elongation values. The graphs in Figure 9b concern the simulation of uniaxial tensile tests performed on plain or notched samples similar to those investigated in [5]. The presence of a centered cut is considered in this case, with crack length equal to about 15% and 50% of the specimen width.…”

Section: Modeling Issuesmentioning

confidence: 99%

“…A paperboard ply (2 in the sketch) confers the main stiffness and strength to this material system, while a thin aluminum foil (4) prevents light and oxygen penetration and natural or artificial polymer layers (1,3,5,6) act as a barrier toward moisture and work as adhesives [1].…”

Section: Introductionmentioning

confidence: 99%

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Aluminum Laminates in Beverage Packaging: Models and Experiences

et al. 2015

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Aluminum laminates are among the main components of beverage packaging. These layered material systems are coupled to paperboard plies except in the cap opening area, where the human force limit sets a requirement on the material properties to allow open-ability and the mechanical characteristics are of particular interest. Experimental investigations have been carried out on this composite and on its components by either traditional or full-field measurement techniques. The interpretation of the collected data has been supported by the simulation of the performed tests considering either a homogenized material model or the individual laminate layers. However, different results may be recovered from similar samples due to physical factors like the material processing route and the embedded defectiveness. In turn, the conclusions may vary depending on the model assumptions. This contribution focuses on the physical effects and on the modeling of the large localized deformation induced by material singularities. This topic is discussed at the light of some experimental results.

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Section: Figure 1 Typical Composition and Functionality Of Beverage mentioning

confidence: 81%

Section: Modeling Issuesmentioning

confidence: 99%

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Aluminum Laminates in Beverage Packaging: Models and Experiences

et al. 2015

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“…On the other side, wrinkling phenomena are frequently observed in wide samples and affect the interpretation of the experimental output [10][11][12][13]. These disturbances can be detected by three-dimensional digital correlation techniques [14,15] and potentially reproduced by finite element analysis.…”

Section: Introductionmentioning

confidence: 99%

“…However, these geometries do not permit to calibrate the fracture properties since failure is provoked by an almost instantaneous material separation. Different aspect ratios and pre-notched material samples have been therefore considered in order to follow the fracture evolution and the relevant crack propagation processes [10,11].…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of non-standard tensile tests of thin metal foils

Bolzon

Shahmardani

2018

AIP Conference Proceedings

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Abstract. The evolution of the fracture processes occurring in thin metal foils can be evidenced by tensile tests performed on samples of non-standard dimensions. The load versus displacement record of these experiments does not return directly the local stress-strain relationship and the fracture characteristics of the investigated material. In fact, the overall response of thin foils is sensitive to local imperfections, size and geometric effects. Simulation models of the performed tests can support the interpretation of the experimental results, provided that the most significant physical phenomena are captured. The present contribution focuses on the role of modelling details on the numerical output that can be obtained in this context.

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A semi-numerical algorithm for instability of compressible multilayered structures

et al. 2015

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A computational method is proposed for the analysis and prediction of instability (wrinkling or necking) of multilayered compressible plates and sheets made by metals or polymers under plane strain conditions. In previous works, a basic assumption (or a physical argument) that has been frequently made is that materials are incompressible to simplify mathematical derivations. To account for the compressibility of metals and polymers (the lower Poisson's ratio leads to the more compressible material), we propose a combined semi-numerical algorithm and finite element method for instability analysis. Our proposed algorithm is herein verified by comparing its predictions with published results in literature for thin films with polymer/metal substrates and for polymer/metal systems. The new combined method is then used to predict the effects of compressibility on instability behaviors. Results suggest potential utility for compressibility in the design of multilayered structures.

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Micro-mechanisms of a laminated packaging material during fracture

Cited by 24 publications

References 25 publications

Aluminum Laminates in Beverage Packaging: Models and Experiences

Aluminum Laminates in Beverage Packaging: Models and Experiences

Numerical simulation of non-standard tensile tests of thin metal foils

A semi-numerical algorithm for instability of compressible multilayered structures

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