High strain rate impact behaviour of epoxy resins at different temperatures

doi:10.19936/j.cnki.2096-8000.20250828.001

Abstract

Abstract: In order to study the dynamic compressive mechanical properties of epoxy resin under high strain rate loading and different temperatures, the yield stress of epoxy resin with strain rate of 0.001 s^-1 was obtained through quasi-static test, and then the dynamic compression test of epoxy resin was conducted by SHPB method. The stress-strain curves under uniaxial compression at temperatures of 25 ℃, 50 ℃ and 70 ℃ and strain rate of 1 000 s^-1, 2 500 s^-1, 3 000 s^-1 were obtained, and the dynamic constitutive relations including strain rate effect and temperature effect of epoxy resin at high strain rate were obtained. The results show that the epoxy resin has strain rate effect, and the development trend of the stress-strain curves of the three high strain rates is the same. Finally, the relationship between yield stress, temperature and strain rate was fitted to describe the relationship between yield stress and temperature of epoxy resin at high strain rate. Based on this, the established constitutive model considering the influence of strain rate and temperature can well describe the stress-strain relationship of epoxy resin at high strain rate, and the research results can provide references for the study of constitutive model of epoxy resin.

Key words: epoxy resin, SHPB, impact mechanics, high strain rate, constitutive equatio

CLC Number:

TB332

ZOU Kai, LIU Zheng, ZHAO Changfang, LIU Hao, LIU Chen, ZHANG Kebin. High strain rate impact behaviour of epoxy resins at different temperatures[J]. COMPOSITES SCIENCE AND ENGINEERING, 2025, 0(8): 1-7.

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