Effect of fiber orientation on the structure of shock waves in carbon fiber-epoxy composites |
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Authors: | A A Lukyanov |
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Institution: | 1.Abingdon Technology Center, Schlumberger, Research and Development,Oxfordshire,UK |
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Abstract: | Using an analytical relation between the Hugoniot (anisotropic and isotropic) states and other thermodynamic (anisotropic
and isotropic) states at high pressures, the effect of fiber orientation on the structure of shock waves in carbon fiber-epoxy
composites of various symmetry is investigated. A correct nonlinear model of propagation of shock waves in anisotropic materials
is proposed, which employs the conception of total generalized pressure and the pressure corresponding to the thermodynamic
response, i.e., to the equation of state. The equation generalizes the nonlinear Hugoniot equation to anisotropic materials
and is reduced to the classical variant in the case of isotropy. Invoking the relations of nonlinear anisotropic solids and
the generalized decomposition of stress tensor, the double structure of shock waves, consisting of nonlinear anisotropic and
isotropic elastic parts, is examined. The numerical calculations of Hugoniot levels of stress agree well with experimental
data for a carbon fiber-epoxy composite selected. |
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Keywords: | |
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