Finite element analysis of expanded polystyrene foam under multiple compressive loading and unloading

Öztürk, Umud Esat; Anlaş, Günay

doi:10.1016/j.matdes.2010.07.025

Cited by 76 publications

(57 citation statements)

References 15 publications

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“…Common availability of modern computational techniques triggers an increased interest in the use of computer‐aided design tools. The finite element method technique enables to research the cushioning systems of packaging as a structure of complex geometry . This facilitates designing the ribbed systems with a minimalized mass of cushion materials, which not only work on the compression (as in the conventional solutions) but also on the bending, torsion or shear.…”

Section: Methods Of Elastic‐damping Properties Description Of the Cusmentioning

confidence: 99%

Modified Method for Dynamic Stress-Strain Curve Determination of Closed-Cell Foams

Piątkowski

Osowski

2016

Packag. Technol. Sci.

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The paper presents a modified method for the non‐linear dynamic stress‐strain curve determination with the use of cushion curves provided by the manufacturers of closed‐cell foams. This method consists of two main stages: stage 1 – the cushion curves transformation to the coordinate system of dynamic stress‐energy density, combined with the cubic b‐spline curve approximation, and stage 2 – development of the dynamic stress‐strain curve considering that the area under the curve is equal to the energy density of a collision. The stress‐strain curves are one of the basic parameters of the foam material models used to describe the collision process, in the modelling environments of finite element method (FEM), e.g. LS‐DYNA. Performed verification consisting in the reconstruction of cushion curves using LS‐DYNA showed that the proposed method of the dynamic stress‐strain curves determination is efficient and effective. Taking into account that access to the stress‐strain curves is hindered (cushioning material manufacturers do not publish them), and the access to charts of cushion curves is easier, the proposed method for determining the stress‐strain curves can relevantly shorten the process of preparing the input data, which are required during modelling of spatial structures using FEM. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Methods Of Elastic‐damping Properties Description Of the Cusmentioning

confidence: 99%

Modified Method for Dynamic Stress-Strain Curve Determination of Closed-Cell Foams

Piątkowski

Osowski

2016

Packag. Technol. Sci.

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“…There are many studies in literature that present constitutive models and methods for calculating the foam behaviour [11,12,17]. EPS foam is a particle foam made by expanding polystyrene beads that contain a blowing agent -usually pentane.…”

Section: Uniform Foam Modelmentioning

confidence: 99%

“…Another interesting article about finite element analysis (FEA) of EPS foam presents a multiple compressive loading and unloading of EPS foam [17]. Results of FEA packages ABAQUS and LS-DYNA were compared to compression test results and crushing diagrams for multiple loadings.…”

Section: Introductionmentioning

confidence: 99%

Dynamic compressive strength and crushing properties of expanded polystyrene foam for different strain rates and different temperatures

et al. 2016

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In this study, static and dynamic compression and crushing tests were conducted on expanded polystyrene (EPS) foam for material characterisation at high strain rates. This was done to obtain the stress-strain curve for different temperatures and densities. An influence of the strain rate on the experimental data was shown. The resulting curves for modelling were extracted from the experimental data, which were obtained from high speed drop tower tests. The methodology for the processing of the experimental data for use in the finite element (FE) modelling was presented. The foam material model of LS-Dyna was used to simulate the dynamic compression process. This model is dedicated to modelling crushable foam with optional damping, tension cut-off, and strain rate effects. The adjustment of the material parameters for successful modelling has been reported. This FE model of EPS foam was validated with experimental data using impact on a "kerbstone" support. This model can be applied for simulation of dynamic loads on a bicycle helmet. It is useful for designing a reliable bicycle helmet geometry for different types of accidents.

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“…Cellular materials are widely used in road-safety applications [2][3][4][5], or in packaging applications [6] for the protection of objects/ products. Normally, in these applications, the components are rarely subjected to a single impact.…”

Section: Introductionmentioning

confidence: 99%

Experimental response of agglomerated cork under multi-impact loads

et al. 2015

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Abstract:In contrast to other cellular materials, which deform by crushing under impact and develop permanent deformation, agglomerated cork has a viscoelastic response and is environmentally friendly; therefore, it could be a good alternative to be used in engineering applications subjected to more than one impact, and thus further understanding of the energy-absorption capabilities of this material under multi-impact conditions is needed. In this work the multiimpact behaviour of agglomerated cork was studied ex-perimentally by performing several consecutive impacts in a drop-weight tower on specimens of dif-ferent thickness and at two impact energy levels. The maximum contact force, maximum strain, and the absorbed energy were evaluated in each test. The results show the great capability of agglomerated cork to continue absorbing energy after several consecutive impacts.

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Finite element analysis of expanded polystyrene foam under multiple compressive loading and unloading

Cited by 76 publications

References 15 publications

Modified Method for Dynamic Stress-Strain Curve Determination of Closed-Cell Foams

Modified Method for Dynamic Stress-Strain Curve Determination of Closed-Cell Foams

Dynamic compressive strength and crushing properties of expanded polystyrene foam for different strain rates and different temperatures

Experimental response of agglomerated cork under multi-impact loads

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