Constitutive modeling and experimental characterization of the non-linear stress-strain behavior of unidirectional carbon-epoxy under high strain rates

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2015

Autores

Vogler, M (Autor) Outra; Koerber, H (Autor) Outra; Kuhn, P (Autor) Outra; Rolfes, R (Autor) Outra; Camanho, PP (Autor) FEUP

Ata de Conferência Internacional

Título: ICCM International Conferences on Composite Materials

20th International Conference on Composite Materials, ICCM 2015

19 July 2015 through 24 July 2015

Indexação

Scopus - 2 Citações

Outras Informações

ID Authenticus: P-00P-MEV

Abstract (EN): The mechanical response of IM7-8552 carbon epoxy was investigated for transverse tension and transverse tension / in-plane shear loadings at static and dynamic strain rates using transverse tension and off-axis tension specimens. The dynamic tests were carried out on a split-Hopkinson tension bar at axial strain rates from 113s-1 to 300s-1. With the already available off-axis and transverse compression test data for IM7-8552 presented in [1], a comprehensive data set is available now, which can be used for validation and calibration of numerical models. The measured axial stress-strain response was simulated using a fully 3D transversely isotropic elastic-viscoplastic constitutive model. The constitutive model represents a viscoplastic extension of the transversely-isotropic plasticity model presented in [2]. A generally quite good correlation between the measured and numerically predicted stress-strain response was achieved for all specimen types and both strain rate regimes. However, the results show the necessity to regard viscous effects in the elastic regime as well.

Idioma: Inglês

Tipo (Avaliação Docente): Científica