Evaluation of transverse shear stiffness of structural core sandwich plates

Nordstrand, Tomas; Carlsson, Leif A.

doi:10.1016/s0263-8223(97)80007-4

Cited by 94 publications

(66 citation statements)

References 3 publications

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“…For corrugated board, Nordstrand [17] used a panel testing rig to perform buckling analyses with initial imperfections due to creases. The Tsai-Wu criterion was employed to predict the failure load, which was in close agreement with that observed experimentally.…”

Section: Literaturementioning

confidence: 99%

Experimental and numerical investigation of creasing in corrugated paperboard

Thakkar¹,

Gooren²,

Peerlings³

et al. 2008

Philosophical Magazine

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International audienceCreasing is a process which indents a section of corrugated board along fold lines to facilitate a neat fold. Most common failure site in a box made out of corrugated board is at the folds, where the stiffness is reduced by the creasing operation. Crease depth is an important parameter to be controlled. If the crease is too shallow, the section will crack during folding due to excessive strain on the outer liner. On the other hand, if the crease is too deep, the board may crack during the creasing operation itself or it may fail during handling due to excessive reduction in local strength along the fold line. A review of the literature reveals that only a limited amount of research has been carried out on experimental creasing of corrugated boards and comparison with numerical analyses. However, modelling of paper for corrugated board has been successfully done using Hill's plasticity model. In this work, experimental investigations on creasing of corrugated paperboard are carried out. These are complemented by finite element simulations of the creasing process. The simulations are found to be in good agreement with the experimental results. The findings of the work done are helpful in understanding the mechanics of creasing more clearly and in arriving at an appropriate crease depth in order to reduce cracking of corrugated board during the creasing process

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Section: Literaturementioning

confidence: 99%

Experimental and numerical investigation of creasing in corrugated paperboard

Thakkar¹,

Gooren²,

Peerlings³

et al. 2008

Philosophical Magazine

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“…Three-point loaded beam approach: In practice, the transverse shear stiffness of beams can be deduced from the relationship between the applied vertical load, P and the corresponded vertical deflection at midspan, ∆ z , of a series of three-point loaded beam tests (Nordstrand and Carlsson, 1997;Zangani et al, 2007) as demonstrated in Fig. 1.…”

Section: Methodsmentioning

confidence: 99%

A Reduced Finite Element Model for Analyzing the Transverse Shear Stiffness of Truss-Like Core Sandwich Beam

Chomphan¹

2011

Journal of Computer Science

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Problem statement:In structural analysis using finite element software, a number of finite element equations affect the speed of calculation time. A reduced finite element model should be used for analyzing structural responses to reduce the calculation time. Approach: This study presents the analysis of transverse shear stiffness of truss-like core sandwich beam using the reduced finite element model based on a unit cell approach. Two kinds of core topologies; an X-truss core and a bi-directional X-truss core, were chosen to be analyzed. The presented reduced finite element model based on the unit cell approach was compared in transverse shear stiffness with the conventional three-point loaded beam approach. Results: Results showed that the unit cell approach could be used for analyzing the transverse shear stiffness of truss-like core sandwich beam with a good correlative with the conventional three-point loaded beam approach and a significantly reduced number of finite element equations. Conclusion: The transverse shear stiffness of truss-like core sandwich beam can be obtained from the reduced finite element model based on unit cell approach. This reduced finite element model can be used to reduce the number of finite element equations; consequently, the speed of calculation time is increased.

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“…For the cardboard system as shown in Fig. 1 were set according to Nordstand [6], which is 0.34, 0.01 and 0.01, respectively. A trial and error procedure was performed, in which different values of the material parameters were tested in order to get the results as close as possible to that of the experiments.…”

Section: Orthotropic Materials Constitutive Modelmentioning

confidence: 99%

Optimization of the finite element model of Corrugated Cardboard based on an orthotropic material constitutive model

Song¹,

Liu²,

Zhu³

2017

Proceedings of the 2017 5th International Conference on Machinery, Materials and Computing Technology (ICMMCT 2017)

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Abstract. This paper presents a study on improvement of the finite element model of corrugated cardboards. There is one shortcoming in modeling the stiffness of such cardboards in literature: neglect of the material non-linear effect of cardboards and cannot predict the peak load. A finite element method was applied to overcome this shortcoming -particularly by adopting an orthotropic material constitutive model.

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Evaluation of transverse shear stiffness of structural core sandwich plates

Cited by 94 publications

References 3 publications

Experimental and numerical investigation of creasing in corrugated paperboard

Experimental and numerical investigation of creasing in corrugated paperboard

A Reduced Finite Element Model for Analyzing the Transverse Shear Stiffness of Truss-Like Core Sandwich Beam

Optimization of the finite element model of Corrugated Cardboard based on an orthotropic material constitutive model

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