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Epoxy, frequently utilized as a matrix material in diverse composite applications, demonstrates distinctive mechanical characteristics when subjected to dynamic loading conditions. This article endeavours to explore and comprehend the influence of high strain rates on epoxy polymer. High strain rate experiments were conducted on EPOFINE®-1564, a Bisphenol-A-based liquid epoxy resin for the strain rates between 1400 and 2800 s−1 utilizing Split Hopkinson Pressure Bar (SHPB) under compressive loading. The results indicated an increase in mechanical properties, including strength and elastic modulus, with rise in strain rate. Additionally, an analytical methodology incorporating the variable-rate power law is described for epoxy resin to assess the compressive strength at high strain rate loading. This analytical approach is applied to evaluate the compressive stress–strain characteristics under high strain rates up to 5000 s−1.

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Experimental and Modelling Studies on the Dynamic Behaviour of Epoxy Under Compressive Loading

  • 会议论文

  • 发表日期：

    2025年

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  • Palak Bhagoria,
  • Muddu Rahul Bharadwaj,
  • Rohit Kumar,
  • Vikrant Tiwari

摘要

Epoxy, frequently utilized as a matrix material in diverse composite applications, demonstrates distinctive mechanical characteristics when subjected to dynamic loading conditions. This article endeavours to explore and comprehend the influence of high strain rates on epoxy polymer. High strain rate experiments were conducted on EPOFINE®-1564, a Bisphenol-A-based liquid epoxy resin for the strain rates between 1400 and 2800 s−1 utilizing Split Hopkinson Pressure Bar (SHPB) under compressive loading. The results indicated an increase in mechanical properties, including strength and elastic modulus, with rise in strain rate. Additionally, an analytical methodology incorporating the variable-rate power law is described for epoxy resin to assess the compressive strength at high strain rate loading. This analytical approach is applied to evaluate the compressive stress–strain characteristics under high strain rates up to 5000 s−1.