Construction of EPE Tension/Compression Constitutive Model and Its Influence on Simulation Results

SUN Xiaojing; FU Zhiqiang; DAI Bing; TANG Weiliang

doi:10.19554/j.cnki.1001-3563.2026.01.018

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Packaging Engineering ›› 2026, Vol. 47 ›› Issue (1) : 161-168. DOI: 10.19554/j.cnki.1001-3563.2026.01.018

Automatic and Intelligent Technology

Construction of EPE Tension/Compression Constitutive Model and Its Influence on Simulation Results

SUN Xiaojing, FU Zhiqiang^*, DAI Bing, TANG Weiliang

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Abstract

In transport packaging, the impact of packaging materials is unavoidable. In impact simulation, only the compression constitutive model is currently considered for material properties, resulting in relatively low simulation accuracy. The work aims to construct a compression and tensile constitutive model for EPE to improve the accuracy of material impact simulation. The compression and tensile constitutive models were constructed based on the experimental stress-strain curves of compression and tensile. The face, edge and angle drops at different heights (300 mm, 450 mm and 600 mm) were simulated and analyzed by experiment combined with the low-density foams module in ABAQUS. For face, edge, and corner drops at different heights, simulations considering only the compressive constitutive behavior showed an error range of 8.09%-30.80% compared with experimental results, while simulations considering both compressive and tensile constitutive behaviors showed a significantly reduced error range of only 1.30%-4.86%. Including tensile constitutive behaviors in simulation analysis can reduce discrepancies between simulation results and experimental data. Therefore, considering the tensile constitutive properties of materials in actual drop simulations can help improve the accuracy of engineering analyses.

Key words

expanded polyethylene / compressive constitutive / tensile constitutive / finite element simulation

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SUN Xiaojing, FU Zhiqiang, DAI Bing, TANG Weiliang. Construction of EPE Tension/Compression Constitutive Model and Its Influence on Simulation Results[J]. Packaging Engineering. 2026, 47(1): 161-168 https://doi.org/10.19554/j.cnki.1001-3563.2026.01.018

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