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- W1970887345 abstract "In this paper, we discuss the effect of porosity on the effective e lastic properties of unidirectional carbon / carbon composites (carbon fibers in pyrolytic carbon matrix) densifi ed by chemical vapor infiltration (CVI). The resulting composite consists of carbon fibers embedded in a porous matrix of pyrolytic carbon (Pyro-C). Such materials tend to ha ve very complex microstructure and to predict their effective mechanical propertie s, it is necessary to analyze them on different lengths scales. The four-level hierarchical materia l model has been proposed in (1). In dependence on the CVI conditions pores, with geometry, forms between fiber s with pyro-C coating (2,3). It is well known in the composite material theory that elast ic moduli of unidirectional composites in longitudinal direction can be predicted with good accuracy by the so-called rule of mixtures (4). Modeling of the effective elastic properties in the plane perpendicular to the fiber direction ( transverse elastic moduli) is a more challenging task that requires not only knowledge of the transverse elastic constants for all the constituents but als o adequate information on phases' distribution and detailed geometry. These pores are analyzed using nume rical conformal mapping procedure (5,6), and their contribution to the effective elastic propertie s is expressed in terms of the cavity compliance contribution tensor. Components of this tensor are found for a variety of typical pore shapes and compared with experimental results." @default.
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- W1970887345 date "2003-10-01" @default.
- W1970887345 modified "2023-10-16" @default.
- W1970887345 title "Influence of Pores on Effective Elastic Properties of Unidirectional Carbon/Carbon Composites" @default.
- W1970887345 cites W1994954364 @default.
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- W1970887345 doi "https://doi.org/10.4028/www.scientific.net/kem.251-252.339" @default.
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