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- W2334425964 abstract "The present study focuses on characterizing and modeling rate dependent compressive strength and shear strength of a high modulus fiber composite (AS4/3501-6 carbon/epoxy) by using off-axis specimens. It was found that significant bending waves were observed in the incident and transmission bars during the compression test using split Hopkinson pressure bar indicating that the waves generated were not uniaxial waves. A thin titanium coating was applied through the use of the vapor deposition technique at the contact ends of the off-axis specimen in order to minimize the indentation effect. The experimental result proved that the surface friction could be successfully eliminated by preventing the direct contact between carbon fiber endings and that the contact surface was smooth enough to allow smooth sliding induced by the shear deformation. Stress-strain curves generated at different strain rates using this type of specimens with strain controlled tests were used to develop a rate dependent constitutive model which was subsequently used to predict rate dependent compressive strength of the composite. Comparison of the model predictions with experimental data indicates that the compressive strength model established with low strain rate test data is valid for high strain rates also. From the rate dependent compressive strength model established by using off-axis specimens, the longitudinal compressive strength at various strain rates of AS4/3501-6 were obtained. A projection method was proposed to obtain the 0 compressive strength of unidirectional fiber reinforced composites by using the off-axis specimens. The experimental projection results fit well with the compressive strength model predictions." @default.
- W2334425964 created "2016-06-24" @default.
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- W2334425964 date "2005-04-18" @default.
- W2334425964 modified "2023-10-16" @default.
- W2334425964 title "Determination of Strain Rate Dependent Compressive Strength of Carbon Fiber Composites" @default.
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- W2334425964 doi "https://doi.org/10.2514/6.2005-2006" @default.
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