Dynamic Response Prediction of Expanded Polystyrene under Successive Impact Conditions

ZHOU Weizhong; ZHOU Dubo; ZHOU Wende; XIANG Shaungxi; LIU Qilong

doi:10.19554/j.cnki.1001-3563.2025.19.005

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Packaging Engineering ›› 2025, Vol. 46 ›› Issue (19) : 41-47. DOI: 10.19554/j.cnki.1001-3563.2025.19.005

Special Topic on Protective Metamaterial and MetastructureAgainst Impact

Dynamic Response Prediction of Expanded Polystyrene under Successive Impact Conditions

ZHOU Weizhong¹, ZHOU Dubo¹, ZHOU Wende², XIANG Shaungxi², LIU Qilong^2*

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Abstract

The work aims to carry out a series of experiments and theoretical studies to study the mechanical behavior of polystyrene foam under consecutive impact loads. Firstly, the ogden hyperelastic model was used to establish a constitutive model of polystyrene foam under single-loading conditions, and the action law of strain rate on the constitutive model was identified according to the experimental data. Then, considering the stress softening effect of EPS, a constitutive model of the Mullins effect of EPS under unloading and reloading conditions was established. Finally, a dynamic model of the vulnerable parts-mass body-EPS foam system was established to predict the acceleration-time curve of the mass body, the acceleration curve of the vulnerable parts, and the impact response spectrum of the vulnerable parts. The acceleration pulse predicted by the constitutive relation is in good agreement with the experimental results, which proves the correctness and reliability of the constitutive mode and the dynamic model established . The results obtained can be applied to the buffer design of EPS. The EPS cushioning system exhibits excellent shock absorption performance under continuous impact loads.

Key words

polyethylene foam / consecutive impact / constitutive model / dynamic responses

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ZHOU Weizhong, ZHOU Dubo, ZHOU Wende, XIANG Shaungxi, LIU Qilong. Dynamic Response Prediction of Expanded Polystyrene under Successive Impact Conditions[J]. Packaging Engineering. 2025, 46(19): 41-47 https://doi.org/10.19554/j.cnki.1001-3563.2025.19.005

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