Numerical modeling of large strain behavior of polymeric crushable foams

Machado, Guilherme; Alves, Marcelo Krajnc; Rossi, Rodrigo; Silva, C.R.A.

doi:10.1016/j.apm.2010.09.004

Cited by 8 publications

(4 citation statements)

References 24 publications

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“…While describing a material’s properties, all of the relevant assumptions for this kind of material was used: theory of hyper-elastic materials [ 30 ], model of elastic foam, elastic-plastic and plastic foam and other causes of energy dissipation–internal dampening and material friction. Simulations were carried out using models for crushable foam.…”

Section: Methodsmentioning

confidence: 99%

Static Mechanical Properties of Expanded Polypropylene Crushable Foam

et al. 2021

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Closed-cell expanded polypropylene (EPP) foam is commonly used in car bumpers for the purpose of absorbing energy impacts. Characterization of the foam’s mechanical properties at varying strain rates is essential for selecting the proper material used as a protective structure in dynamic loading application. The aim of the study was to investigate the influence of loading strain rate, material density, and microstructure on compressive strength and energy absorption capacity for closed-cell polymeric foams. We performed quasi-static compressive strength tests with strain rates in the range of 0.2 to 25 mm/s, using a hydraulically controlled material testing system (MTS) for different foam densities in the range 20 g/dm3 to 220 g/dm3. The above tests were carried out as numerical simulation using ABAQUS software. The verification of the properties was carried out on the basis of experimental tests and simulations performed using the finite element method. The method of modelling the structure of the tested sample has an impact on the stress values. Experimental tests were performed for various loads and at various initial temperatures of the tested sample. We found that increasing both the strain rate of loading and foam density raised the compressive strength and energy absorption capacity. Increasing the ambient and tested sample temperature caused a decrease in compressive strength and energy absorption capacity. For the same foam density, differences in foam microstructures were causing differences in strength and energy absorption capacity when testing at the same loading strain rate. To sum up, tuning the microstructure of foams could be used to acquire desired global materials properties. Precise material description extends the possibility of using EPP foams in various applications.

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Section: Methodsmentioning

confidence: 99%

Static Mechanical Properties of Expanded Polypropylene Crushable Foam

et al. 2021

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“…For textile reinforcement, the Plasticity [22] material law was given, which assumes the same behaviour under both tension and compression. For polystyrene, the Crushable Foam [23] material model was chosen. A static nonlinear Riks analysis which is usually used to predict the nonlinear collapse of structures was employed to obtain the maximum load that can be borne by the panels at four point bending loads.…”

Section: Methodsmentioning

confidence: 99%

Textile-reinforced concrete facade panels with rigid foam core prisms

Chira

Kumar

Vlach

et al. 2015

Jnl of Sandwich Structures & Materials

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Textile-reinforced concrete (TRC) is a material that is gaining new ground in the field of construction where it not only allows for the manufacture of reduced lightweight structures but also eliminates the problem of corrosion by using alkali-resistant textile reinforcement. The aim of this paper is to investigate the bending behaviour of a newly developed TRC facade panel that incorporates polystyrene foam prisms. Numerical simulations were employed in order to choose the geometry and repartition of prisms inside the facade panel. Experimental results revealed a reduced amount of concrete by 20% via the use of rigid foam prisms with a higher failure load by 16% but a lower elasticity limit by 49% in comparison with the regular facade panels.

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“…Yang 등은 발포고분자의 에너지 흡수능 력에 대한 응력연화거동의 영향을 분석하였다 [13]. Machado 등은 발포고분자의 대변형거동을 유한요소모델링으로 표 현하였다 [14]. Zhou 등은 발포고분자가 내장된 샌드위치 판 의 저속 충격특성을 분석하였다 [15].…”

Section: 서 론unclassified

An Experimental Study on the Absorbed Energy of Polymeric Foam According to Different Mass and Impact Velocity Based on the Constant Impact Energy

Kim¹,

Kim²,

Cheon³

2014

Composites Research

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In the present study, impact tests were carried out to investigate the crashworthy behaviour of the expanded polypropylene under the constant incident energy (100 J and 200 J) with five different combinations of striker mass and velocity. Also, preliminary quasi-static test was performed to obtain basic characteristics of the expanded polypropylene. MTS 858 and Instron dynatup 9250 HV were used for the quasi-static test and impact tests, respectively. In consequence, it was found that the impact energy absorption characteristics of the expanded polypropylene was more influenced by the striker mass instead of the velocity of the striker.

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Numerical modeling of large strain behavior of polymeric crushable foams

Cited by 8 publications

References 24 publications

Static Mechanical Properties of Expanded Polypropylene Crushable Foam

Static Mechanical Properties of Expanded Polypropylene Crushable Foam

Textile-reinforced concrete facade panels with rigid foam core prisms

An Experimental Study on the Absorbed Energy of Polymeric Foam According to Different Mass and Impact Velocity Based on the Constant Impact Energy

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