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Mechanical properties of Al/Al<sub>2</sub>O<sub>3</sub> and Al/B<sub>4</sub>C composites
Pandey, Vinod K.,Patel, Badri P.,Guruprasad, Siddalingappa Techno-Press 2016 Advances in materials research Vol.5 No.4
Mechanical properties of $Al/Al_2O_3$ and $Al/B_4C$ composites prepared through powder metallurgy are estimated up to 50% $Al_2O_3$ and 35% $B_4C$ weight fractions using micromechanics models and experiments. The experimental Young's modulus up to 0.40 weight fraction of ceramic is found to lie closely between Ravichandran's/Hashin-Shtrikman lower/upper bounds, and close to self consistent method/Miller and Lannutti method/modified rule of mixture/fuzzy logic method single value predictions. Measured Poisson's ratio lies between rule of mixture/Ravichandran lower and upper bound/modified Ravichandran upper bounds. Experimental Charpy energy lies between Hopkin-chamis method/equivalent charpy energy/Ravichandran lower limit up to 20%, and close to the reciprocal rule of mixture for higher $Al_2O_3$ content. Rockwell hardness (RB) and Micro-hardness of $Al/Al_2O_3$ are closer to modified rule of mixture predictions.
SEMI-INVARIANT SUBMANIFOLDS OF (LCS)<sub>n</sub>-MANIFOLD
Bagewadi, Channabasappa Shanthappa,Nirmala, Dharmanaik,Siddesha, Mallannara Siddalingappa Korean Mathematical Society 2018 대한수학회논문집 Vol.33 No.4
In this paper the decomposition of basic equations of $(LCS)_n$-manifolds is carried out into horizontal and vertical projections. Further, we study the integrability of the distributions $D,D{\oplus}[{\xi}]$ and $D^{\perp}$ totally geodesic of semi-invariant submanifolds of $(LCS)_n$-manifold.
Solitons of K\"{A}hlerian Norden space-time manifolds
Praveena Manjappa Mundalamane,Bagewadi Channabasappa Shanthappa,Mallannara Siddalingappa Siddesha 대한수학회 2022 대한수학회논문집 Vol.37 No.3
We study solitons of K\"{a}hlerian Norden space-time manifolds and Bochner curvature tensor in almost pseudo symmetric K\"{a}hlerian space-time manifolds. It is shown that the steady, expanding or shrinking solitons depend on different relations of energy density/isotropic pressure, the cosmological constant, and gravitational constant.