Influence of Strain Rate and Temperature on Compressive Properties and Energy Absorption Efficiency of Expanded Polystyrene and Flexible Polyurethane Foam

Authors

  • Zexiong ZHANG University of Science and Technology of China; Institute of Systems Engineering, China Academy of Engineering Physics; Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province
  • Zhong Weizhou Institute of Systems Engineering, China Academy of Engineering Physics; Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province
  • MR. Chen Institute of Systems Engineering, China Academy of Engineering Physics; Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province
  • MR. luo University of Science and Technology of China; Institute of Systems Engineering, China Academy of Engineering Physics
  • MR. LI Institute of Systems Engineering, China Academy of Engineering Physics; Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province
  • MR. Huang Institute of Systems Engineering, China Academy of Engineering Physics

DOI:

https://doi.org/10.5755/j02.mech.33486

Keywords:

Expanded polystyrene foam, Flexible polyurethane foam, Energy absorption, Strain rate, Low temperature

Abstract

In this work, large deformation compressive experiments of expanded polystyrene foam (EPS) and flexible polyurethane foam (FPUF) at low temperature (-20 °C) and room temperature (20 °C) with strain rates ranging from 1 s-1 to 100 s-1 were performed using high speed material test machine. According to the experimental results, both EPS materials and FPUF materials show the stress features of the wide platform, and the mechanical properties and the cushioning energy performance of EPS are far better than the FPUF. The testing results indicate the yield strength, plateau stress and energy absorption efficiency of EPS and FPUF increase with strain rate, and the properties at low temperature are higher slightly than that of room temperature. However, the efficiency of the two material buffer absorption is only related to the material itself. The strain rate and external temperature do not affect the best energy absorption efficiency of the material. Finally, on the basis of the experimental results, combine the Sheerwood-Frost model framework, establish the relationship between EPS materials and FPUF materials stress and strain, strain rate, temperature and other variables. This can provide accurate material attributes for simulation analysis.

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Published

2023-12-22

Issue

Vol. 29 No. 6 (2023)

Section

MECHANICS OF SOLID BODIES