Ultra-high temperature composite ceramic matrix composites ZrC-SiC, ZrB2-ZrC-SiC and HfB2-HfC-SiC were fabricated by precursor infiltration and pyrolysis method. The ultra-high temperature ceramic phases in the materials were characterized by submicron/ nanometer uniform dispersion distribution. Ablation behaviors of ZrC-SiC, ZrB2-ZrC-SiC and HfB2-...
Ultra-high temperature composite ceramic matrix composites ZrC-SiC, ZrB2-ZrC-SiC and HfB2-HfC-SiC were fabricated by precursor infiltration and pyrolysis method. The ultra-high temperature ceramic phases in the materials were characterized by submicron/ nanometer uniform dispersion distribution. Ablation behaviors of ZrC-SiC, ZrB2-ZrC-SiC and HfB2-...
Published in Physical Mesomechanics
Bulk strain energy density was numerically simulated for epoxy-phenol-based composites randomly reinforced with short polyimide fibers, with antifriction dispersed polytetrafluoroethylene (PTFE) additives. A mathematical model was constructed using the notion of a stress concentration operator (fourth-rank tensor) that relates volume averaged, or e...
Published in Russian Engineering Research
The limiting strength in the compression of composites based on an epoxy-resin matrix with disperse inclusions (graphite, E-glass, copper, and iron) is simulated on the basis of the generalized singular approximation of random-field theory, using the stress-concentration operator and data regarding the strength of the epoxy matrix.
Published in Russian Engineering Research
The bulk deformational energy density is simulated in antifrictional fabric composites with an epoxy base reinforced by polytetrafluoroethylene and glass fibers in two mutually perpendicular directions. The fibers in different directions consist of different materials. The influence of the external mechanical action and the content of fibers in the...
Published in Russian Engineering Research
The energy of the elastic field in unidirectional composites based on high-epoxy resins is calculated. The influence of the composition and concentration of isotropic components and the type of external mechanical loading on that elastic energy is considered.
In this research, Yttria Stabilized Zirconia (3YTZP) - carbon nanotube (CNT) composites are fabricated by direct in-situ growth of CNTs on the Zirconia particles, followed by densification via the Spark Plasma Sintering (SPS) technique. Scanning electron microscopy analysis of the 3YTZP-CNT powders shows uniform distribution of CNTs without the for...
Dense sintered esseneite-wollastonite-plagioclase glass-ceramics have been successfully prepared from a vitrified mixture of important inorganic waste (Bayer process red mud, fly ash from lignite combustion and residues from the polishing of porcelain stoneware tiles). The enhanced nucleation activity of fine glass powders, favoured by particular o...
The tensile failure of fiber-reinforced composites in 2D (l-ply) and thin multi-ply samples has been studied numerically in order to assess the role of dimensionality on the absolute magnitude, reliability, and size scaling of composite strength. Single-ply tapes, often used in model calculations because of the simplifications attending the reduced...
Gradual damage development in carbon fibre-reinforced polymers (CFRP) and its effect on the mechanical properties have been important subjects of investigation for many years. Most authors have studied transverse matrix cracking in cross-ply lay-ups and used the longitudinal Young's modulus as an indicator of the extent of damage development. Reduc...
