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<p>The polymeric films exhibit a significant temperature effect, so their application is limited. This paper explores the influence law of temperature on the mechanical properties of PE/PA/PE film through the uniaxial tensile test at different temperatures (− 20 to 60 °C). The true stress-strain curve of the material is obtained by the finite element correction method. The exponential function can describe the trend of the elastic modulus and yield strength with temperature. A constitutive equation with a temperature term is established and verified based on the improved shape function of the Sherwood-Frost constitutive model and the Johnson-Cook constitutive model. The applicability of the proposed model was further validated by simulating the static compression of inflation bags at an extended temperature range. In the application process, this paper demonstrates the accuracy of the simulation model through the use of a scanner. The results show that the constitutive equation can effectively predict the mechanical properties of inflatable products at different temperatures in the range of experimental studies.</p>

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Establishment of Polymeric Films Constitutive Equations for Temperature Based on Finite Element Correction Method

  • 期刊论文

  • 发表日期：

    2025年8月18日

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  • Zhiqiang Fu,
  • Hesong Liu,
  • Liying Duan,
  • Liqiang Huang,
  • Hongsong Wang,
  • Xiaoyu Jia,
  • Zhiyong Zhao,
  • Guipeng Zhang

摘要

The polymeric films exhibit a significant temperature effect, so their application is limited. This paper explores the influence law of temperature on the mechanical properties of PE/PA/PE film through the uniaxial tensile test at different temperatures (− 20 to 60 °C). The true stress-strain curve of the material is obtained by the finite element correction method. The exponential function can describe the trend of the elastic modulus and yield strength with temperature. A constitutive equation with a temperature term is established and verified based on the improved shape function of the Sherwood-Frost constitutive model and the Johnson-Cook constitutive model. The applicability of the proposed model was further validated by simulating the static compression of inflation bags at an extended temperature range. In the application process, this paper demonstrates the accuracy of the simulation model through the use of a scanner. The results show that the constitutive equation can effectively predict the mechanical properties of inflatable products at different temperatures in the range of experimental studies.