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Investigation of the Strain Rate Effects of EPS Foam

EPS Foam의 변형률속도효과에 대한 연구

  • Published : 2010.06.30

Abstract

Expanded polystyrene(EPS) foams are often used in packaging to protect electrical appliances from impact loads. The energy absorbing performances of the EPS foams depend on several parameters such as density, microstructure and strain rate. Thus, the effects of the parameters on the strength of the EPS foams need to be investigated for an optimized packaging design by FEM. In this study, various EPS foams which have different densities were quasi-statically and dynamically loaded in order to obtain the stress-strain curves. EPS foams of various densities from 18.5 to 37.0kg/m3 were considered in the experiments. A drop-mass type apparatus was developed for the intermediate strain rate tests up to several hundreds/second. It was found from the experimental results that the strength of the EPS foams increase about 170% as the strain rate increases from 0.06/s to 60/s. Experimental results also showed that the strain rate sensitivity increases as the strain increases.

Acknowledgement

Supported by : 경일대학교

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  1. Experimental Study for the Impact Characteristics of Expanded EPP/EPS Foams vol.26, pp.6, 2013, https://doi.org/10.7234/composres.2013.26.6.343