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- W2035801968 abstract "EPS 폼은 충격하중으로부터 전자제품의 파손을 방지하기 위하여 포장재로 많이 사용되는 경량소재이며 밀도, 미세구조, 변형률 속도에 따라 에너지 흡수성능이 달라진다. 본 연구에서는 변형률속도와 밀도의 변화에 대한 EPS 폼의 에너지 흡수성능을 평가하기 위하여 18.5 ~ 37.0kg/m3의 밀도를 갖는 EPS 폼의 압축시험을 수행하였다. 중고속 압축시험을 위하여 낙하방식의 시험기를 개발, 사용하였으며 변형률 속도 0.06/s ~ 60/s에서의 압축시험을 통하여 EPS 폼의 변형률속도 효과를 분석하였다. 시험 결과 변형률 속도가 0.06/s에서 60/s로 증가할 경우 EPS 폼의 강도는 약 1.7배 증가하는 것으로 관찰되었다. 또한 변형률 속도에 따른 소재의 민감도는 변형률이 증가할수록 커지는 것으로 관찰되었다. 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." @default.
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- W2035801968 date "2010-06-30" @default.
- W2035801968 modified "2023-09-24" @default.
- W2035801968 title "Investigation of the Strain Rate Effects of EPS Foam" @default.
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- W2035801968 doi "https://doi.org/10.7234/kscm.2010.23.3.064" @default.
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