Calibration and Application of an EPS Material Simulation Model

JIA Xingge; SUN Wei; ZHOU Junli; ZHAO Liangliang; JIE Ning; HU Yang; XUN Jiandong; GE Danping

doi:10.19554/j.cnki.1001-3563.2025.21.032

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Packaging Engineering ›› 2025, Vol. 46 ›› Issue (21) : 296-303. DOI: 10.19554/j.cnki.1001-3563.2025.21.032

Equipment Protection

Calibration and Application of an EPS Material Simulation Model

JIA Xingge^1,2*, SUN Wei^1,2, ZHOU Junli^1,2, ZHAO Liangliang^1,2, JIE Ning^1,2, HU Yang^1,2, XUN Jiandong^1,2, GE Danping^1,2

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Abstract

The work aims to identify the simulation models suitable for expanded polystyrene (EPS) foaming materials under various working conditions through the calibration of the M57 and M83 material models in LS-DYNA and subsequently apply the models to the simulation of EPS packaging boxes for liquid crystal displays in handling and inclined plane impact scenarios. Compression and tensile tests were conducted on EPS foaming materials. The M57 and M83 models in LS-DYNA were employed to simulate compression and tensile tests, respectively. By comparing the simulated force-displacement curves with experimental data, the most appropriate simulation model for EPS foaming materials was determined. Based on this analysis, optimal models for different loading conditions were selected and used to perform handling and inclined impact simulations of liquid crystal display packaging within LS-DYNA. At a strain rate of 0.001 s^-1, the compression simulation errors for the M57 and M83 models were 0.9% and 2.1%, respectively, while the tensile simulation errors were 25.5 % and 5.9%. At a strain rate of 1 s^-1, the compression simulation errors were 1.1% and 4.1%, respectively, and the tensile simulation errors were 41% and 14.2%. Handling simulations of the EPS packaging box using the M57 model resulted in an 8.8% deflection error. The M83 model was utilized for inclined impact simulations of EPS packaging boxes in the entire pallet. The resulting impact stress exceeded the tensile fracture stress of materials, leading to crack formation at the corners of the packaging box. These crack locations corresponded closely with those observed in physical tests. The M57 model demonstrates superior accuracy in predicting compressive force-displacement behavior of EPS compared to the M83 model. Conversely, the M83 model provides better prediction of tensile force-displacement characteristics than the M57 model.

Key words

EPS foaming material / calibration of simulation model / simulation of handling operations / inclined impact simulation

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JIA Xingge, SUN Wei, ZHOU Junli, ZHAO Liangliang, JIE Ning, HU Yang, XUN Jiandong, GE Danping. Calibration and Application of an EPS Material Simulation Model[J]. Packaging Engineering. 2025, 46(21): 296-303 https://doi.org/10.19554/j.cnki.1001-3563.2025.21.032

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