Numerical analysis and experiments for increased understanding of cartonboard creasing and folding
2012 (English)In: Verarbeitungsmaschinen und Verpackungstechnik 2012, 2012, 295-313 p.Conference paper (Other academic)
Creasing and folding are vital processes in manufacturing of liquid and cartonboard packages. The quality of the crease and the subsequent folding is essential for good runnability and aesthetic appearance. The out-of-plane mechanical properties of cartonboard are particularly import in these processes. In this paper, recent advances in analysis of creasing and folding, using numerical simulations by means of the finite element method and the through-thickness shear strength profile of cartonboard, are presented.
Existing methods to determine the out-of-plane shear strength of paper materials only give the strength in the weakest layer. In order to capture the through-thickness variation in shear strength the laminated notched shear test was introduced.
In the simulations, the cartonboard was represented by a combination of continuum and cohesive models in order to capture the bulk and delamination properties, respectively. The continuum model was calibrated for each ply by testing individual plies that were isolated by grinding, and the cohesive model was calibrated using shear strength data from laminated notched shear tests.
Results from the simulations are compared with creasing and folding experiments and the agreement is excellent considering the relative simplicity of the analysis. Finally, practical implications for trouble-shooting creasing and folding problems will be discussed.
Place, publisher, year, edition, pages
2012. 295-313 p.
Applied Mechanics Paper, Pulp and Fiber Technology
IdentifiersURN: urn:nbn:se:kth:diva-92554OAI: oai:DiVA.org:kth-92554DiVA: diva2:513623
Verarbeitungsmaschinen und Verpackungstechnik 2012, Dresden, March 22-23, 2012
QC 201206042012-06-042012-04-032012-06-04Bibliographically approved