Modeling the High Strain Rate Behavior of Graphene Epoxy Nanocomposites Using Cooperative Viscoplasticity Theory Based on Overstress and Mori-Tanaka Homogenizsation

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Çolak Çakır Ö. Ü., Bakbak O.

HSTRATE Advanced Composites under High Strain Rate Loading A Route to Certification-by-Analysis, Guipuzcoa, İspanya, 3 - 04 Haziran 2025, ss.1, (Tam Metin Bildiri)

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Guipuzcoa
  • Basıldığı Ülke: İspanya
  • Sayfa Sayıları: ss.1
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

Cooperative viscoplasticity theory based on overstress (C-VBO) is developed to describe the rate-dependent mechanical response of graphene epoxy nanocomposites. The model integrates the Mori-Tanaka homogenization scheme to account for the effective properties of the nanocomposite, considering the dispersion and interfacial interactions of graphene nanoplatelets within the epoxy matrix. The VBO framework enables the prediction of strain-rate sensitivity, and inelastic deformation mechanisms under high strain rates. The model parameters are calibrated using experimental data obtained from Split Hopkinson Pressure Bar (SHPB) tests.