Effect of mechanical perforation on the press-forming process of paperboard

Leminen, Ville; Tanninen, Panu; Pesonen, Antti; Varis, Juha

doi:10.1016/j.promfg.2020.01.148

Cited by 13 publications

(14 citation statements)

References 9 publications

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“…The SRPs are made of corrugated cardboard with different perforations, which enable easy separation of the lower part of the packaging, called the tray, and the upper part of the packaging, called the cover. On the other hand, perforations can significantly influence the mechanical strength of boxes made of corrugated paperboards [1]. It reduces the integrity of the wall.…”

Section: Introductionmentioning

confidence: 99%

“…The FEM simulations of paperboard creasing and folding useful for the packing industry and important from a practical point of view has been presented by Domaneschi et al [34]. Awais et al [35] and Leminena et al [1] investigated, experimentally and numerically, the influence of the crease on the mechanical properties of the paperboard during the press forming process. However, to the best knowledge of the authors, there are no papers on the influence of perforations on the strength of the whole boxes made of corrugated cardboard.…”

Section: Introductionmentioning

confidence: 99%

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Estimation of the Compressive Strength of Corrugated Cardboard Boxes with Various Perforations

2021

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This paper presents a modified analytical formula for estimating the static top-to-bottom compressive strength of corrugated board packaging with different perforations. The analytical framework is based here on Heimerl’s assumption with an extension from a single panel to a full box, enhanced with a numerically calculated critical load. In the proposed method, the torsional and shear stiffness of corrugated cardboard, as well as the panel depth-to-width ratio is implemented in the finite element model used for buckling analysis. The new approach is compared with the successful though the simplified McKee formula and is also verified with the experimental results of various packaging designs made of corrugated cardboard. The obtained results indicate that for boxes containing specific perforations, simplified methods give much larger estimation error than the analytical–numerical approach proposed in the article. To the best knowledge of the authors, the influence of the perforations has never been considered before in the analytical or analytical–numerical approach for estimation of the compressive strength of boxes made of corrugated paperboard. The novelty of this paper is to adopt the method presented to include perforation influence on the box compressive strength estimation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Estimation of the Compressive Strength of Corrugated Cardboard Boxes with Various Perforations

2021

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“…FEM simulations of paperboard creasing, which appeared to be significant from a practical standpoint, have been proposed by Domaneschi et al [ 25 ] and Awais et al [ 26 ]. Leminena et al [ 27 ] performed experimental and numerical analyses to examine the influence of the creasing process during the press forming on the paperboard mechanical properties. FEM has also been involved in research raising the issue of numerical analysis in relation to transverse shear stiffness of the corrugated cardboards [ 28 , 29 , 30 , 31 , 32 ] or buckling and post-buckling phenomena [ 33 ].…”

Section: Introductionmentioning

confidence: 99%

Numerical Homogenization of Multi-Layered Corrugated Cardboard with Creasing or Perforation

2021

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The corrugated board packaging industry is increasingly using advanced numerical tools to design and estimate the load capacity of its products. This is why numerical analyses are becoming a common standard in this branch of manufacturing. Such trends cause either the use of advanced computational models that take into account the full 3D geometry of the flat and wavy layers of corrugated board, or the use of homogenization techniques to simplify the numerical model. The article presents theoretical considerations that extend the numerical homogenization technique already presented in our previous work. The proposed here homogenization procedure also takes into account the creasing and/or perforation of corrugated board (i.e., processes that undoubtedly weaken the stiffness and strength of the corrugated board locally). However, it is not always easy to estimate how exactly these processes affect the bending or torsional stiffness. What is known for sure is that the degradation of stiffness depends, among other things, on the type of cut, its shape, the depth of creasing as well as their position or direction in relation to the corrugation direction. The method proposed here can be successfully applied to model smeared degradation in a finite element or to define degraded interface stiffnesses on a crease line or a perforation line.

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“…Domaneschi et al [ 36 ] and Awais et al [ 37 ] proposed an essential (from a practical point of view) solution for the packaging industry, basing it on the FEM simulations of paperboard creasing. Experimental, as well as numerical, studies on the influence of the creasing process during press forming on the paperboard mechanical properties were conducted by Leminen et al [ 38 ].…”

Section: Introductionmentioning

confidence: 99%

Estimation of the Compressive Strength of Corrugated Board Boxes with Shifted Creases on the Flaps

Mrówczyński¹,

Garbowski

Knitter-Piątkowska

2021

Materials

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In the modern world, all manufacturers strive for the optimal design of their products. This general trend is recently also observed in the corrugated board packaging industry. Colorful prints on displays, perforations in shelf-ready-packaging and various types of ventilation holes in trays, although extremely important for ergonomic or functional reasons, weaken the strength of the box. To meet the requirements of customers and recipients, packaging manufacturers outdo each other with new ideas for the construction of their products. Often the aesthetic qualities of the product become more important than the attention to maintaining the standards of the load capacity of the packaging (which, apart from their attention-grabbing functions, are also intended to protect transported products). A particular flaps design (both top and bottom) and its influence on the strength of the box are investigated in this study. An updated analytical–numerical approach is used here to predict the strength of packaging with various flap offsets. Experimental results indicated a significant decrease in the static load-bearing capacity of packaging in the case of shifted flap creases. The simulation model proposed in our previous work has been modified and updated to take into account this effect. The results obtained by the model presented in this paper are in satisfactory agreement with the experimental data.

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Effect of mechanical perforation on the press-forming process of paperboard

Cited by 13 publications

References 9 publications

Estimation of the Compressive Strength of Corrugated Cardboard Boxes with Various Perforations

Estimation of the Compressive Strength of Corrugated Cardboard Boxes with Various Perforations

Numerical Homogenization of Multi-Layered Corrugated Cardboard with Creasing or Perforation

Estimation of the Compressive Strength of Corrugated Board Boxes with Shifted Creases on the Flaps

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