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Effect of silicon carbide and wire-mesh reinforcements in dissimilar grade aluminium explosive clad composites

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Defence Technology（防务技术） 2020年第6期16卷 1160-1166页

作者： s.saravanan K.Raghukandan Department of Mechanical Engineering Annamalai UniversityAnnamalainagarTamilnaduIndia Department of Manufacturing Engineering Annamalai UniversityAnnamalainagarTamilnaduIndia

Aluminium composites are inevitable in the manufacture of aircraft structural elements owing to less weight,superior corrosion resistance and higher specific *** composites reduce the weight of the aircraft,improve the fuel efficiency and enhance the maintenance *** study proposes the development of dissimilar grade aluminium(aluminium 1100-aluminium 5052)composites with different reinforcement’s viz.,stainless steel wire-mesh,silicon carbide(siC)powders and siC powder interspersed wire-mesh,by explosive cladding ***-mesh enhances the friction and restricts the movement of flyer plate to craft a defect free clad,while siC particles form a band on the *** strength is obtained when siC powder interspersed wire mesh is employed as *** dissimilar aluminium explosive clad with siC particle reinforcement results in lower strength,which is higher than that of the weaker parent alloy and that of the conventional dissimilar aluminium explosive clads without any reinforcement.

关键词： Explosive cladding Aluminium Wire mesh silicon carbide Microstructure strength

Big Data analytics for privacy through ND-homomorphic encryption

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Journal of Control and Decision 2023年第1期10卷 64-71页

作者： s.saravanan N.Poornima Department of CsE SRM Institute of Science and TechnologyChennaiIndia Department of Data science and Business systems School of ComputingSRM Institute of Science and TechnologyKattankulathurIndia

Rapidly rising the quantity of Big Data is an opportunity to flout the privacy of people. Whenhigh processing capacity and massive storage are required for Big Data, distributed networkshave been used. There are several people involved in these activities, the system may contributeto privacy infringements frameworks have been developed for the preservation of privacy atvarious levels (e.g. information age, information the executives and information preparing) asfor the existing pattern of huge information. We plan to frame this paper as a literature surveyof these classifications, including the Privacy Processes in Big Data and the presentation of theAssociate Challenges. Homomorphic encryption is particularised aimed at solitary single actionon the ciphered information. Homomorphic enciphering is restrained to an honest operation onthe encoded data. The reference to encryption project fulfils many accurate trading operationson coded numerical data;therefore, it protects the written in code-sensible information evenmore.

关键词： security and confidentiality vast statistics data encryption nondeterministic fully homomorphic encryption

Numerical and experimental investigation on aluminum 6061-Vgrooved stainless steel 304 explosive cladding

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Defence Technology（防务技术） 2022年第2期18卷 249-260页

作者： C.Wilson dhileep kumar s.saravanan K.Raghukandan Department of Mechanical Engineering Annamalai UniversityAnnamalainagarTamilnadu608002India Department of Manufacturing Engineering Annamalai UniversityIndia

This study attempts to analyze the microstructure and interface behavior of aluminum 6061(Al 6061)-Vgrooved stainless steel(ss304)explosive cladding by numerical and experimental *** simulation was performed by smoothed Particle Hydrodynamics(sPH)technique,in ANsYs AUTODYN,and the results are correlated with experimental *** machining of V-grooves on the base plate transform the melted layer formed in conventional cladding(without grooves on the base plate)into a smooth undulating interface,for a similar experimental *** flyer plate and collision velocities,observed in numerical simulation,are in good agreement to the analytical *** pressure developed in the flyer plate is higher than the base plate and the maximum pressure is witnessed at the collision point irrespective of grooved base plate or *** temperature developed in the collision point of conventional explosive cladding exceeds the melting point of both the participant metals,whereas,it exceeds the melting point of aluminum alone,in case of V-grooved base plate *** shear and impact strengths of the V-grooved base plate clads are higher than the conventional clads and the fracture surfaces exhibit mixed modes of fracture.

关键词： Explosive cladding Dissimilar metals Grooves Numerical simulation Interface strength

Temporal and spatial variation in the sediment volume along the beaches between Ovari and Kanyakumari(sE INDIA)

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International Journal of sediment Research 2013年第3期28卷 384-395页

作者： s.saravanan N.CHANDRAsEKAR V.JOEVIVEK Centre for GeoTechnology Manonmaniam Sundaranar University Civil Engineering Department Christ the King Engineering College

A 2-year set of profile data from Ovari to Kanyakumari Beach,sE India has been analysed by using empirical orthogonal function(EOF) techniques to identify characteristic patterns of temporal and spatial variation in the sediment volume of the *** results show that variation in the sediment volume of the beach is determined by interaction between the biennial and seasonal *** analysis the pattern of alongshore sediment exchange along the study *** method facilitated separation of onshore-offshore and alongshore modes of sediment transfer and identification of the patterns of alongshore sediment *** eigenfunction modes confirm the dominance of biennial,annual,and biannual sediment transfers occurring on study *** sediment movement along the shoreline of study area is mainly governed by the forces associated with the incoming waves and the availability of sediments within the *** present investigation has been made as an attempt to appreciate the sediment movement in relation to wave activity along the *** longshore sediment transport is intensive in the northerly direction as compared to southerly *** normal condition is for and to be moved annually or more frequently in the shallows and on the *** and wave-driven currents cause longshore drift of sand along the beach and offshore.

关键词： Beach Profile sediment movement Beach volume change India

Analgesic and anti-inflammatory activities of Passiflora foetida L.

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Asian Pacific Journal of Tropical Medicine 2011年第8期4卷 600-603页

作者： sasikala V saravanan s Parimelazhagan T Bioprospecting Laboratory Department of BotanyBharathiar UniversityCoimbatoreTamil NaduIndia

Objective:To investigate the analgesic and anti-inflammatory activities of ethanol extract of Passiflora foetida(***) ***:Ethanol extract of *** leaf was evaluated for analgesic action by acetic acid-induced writhing and hot plate method in albino *** anti-inflammatory property of ethanolic leaf extract was tested by carrageenan induced acute paw edema and histamine induced acute paw edema in ***:The dose 200 mg/kg of P. foetida leaf extract exhibited highest significant analgesic activity[(13.50±0.43) min]at a reaction time of 20 min in hot plate method in *** ethanol extract of leaf dose 100 mg/kg produced a highly significant anti inflammatory effect[(1.302±0.079) mL]in ***:It is very clear that *** also has analgesic and anti-inflammatory activities for the pharmaceuticals.

关键词： Passiflora foetida Carrageenan Histamine Analgesic Anti-inflammatory

Microstructural characterization of silicon carbide reinforced dissimilar grade aluminium explosive clads

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Defence Technology（防务技术） 2020年第3期16卷 689-694页

作者： s.saravanan H.Inokawa R.Tomoshige K.Raghukandan Research Centre for Advances in Impact Engineering Sojo UniversityKumamotoJapan Department of Mechanical Engineering Annamalai UniversityTamilnaduIndia Department of Nanoscience Sojo UniversityKumamotoJapan Department of Manufacturing Engineering Annamalai UniversityTamilnaduIndia

Aluminium composites are inevitable in ship building,commercial and defence aircrafts construction due to their light weight,high strength to weight ratio,admirable properties and cost *** this study,the microstructural characteristics of explosive cladded dissimilar grade aluminium(Al 1100-Al 5052) clad composites reinforced with silicon carbide(siC) particles is *** taken at the interface by optical and scanning electron microscopes(sEM) revealed the formation of a silicon carbide layer between the dissimilar grade aluminium *** reaction layers were witnessed at few locations along the interface,the diffusion of atoms between the participant metals is not visible as confirmed by energy dispersive spectroscopy,elemental mapping,line analysis and X-ray diffraction(XRD).The variation in microhardness at various regions of the silicon carbide reinforced dissimilar aluminium explosive clad is *** increase in tensile strength of the siC laced clad is also presented.

关键词： Explosive cladding Aluminium silicon carbide Microstructure Elemental mapping Hardness

Microstructure,strength and welding window of aluminum alloy-stainless steel explosive cladding with different interlayers

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Transactions of Nonferrous Metals society of China 2022年第1期32卷 91-103页

作者： s.saravanan K.RAGHUKANDAN Department of Mechanical Engineering Annamalai UniversityAnnamalainagar608002TamilnaduIndia Department of Manufacturing Engineering Annamalai UniversityAnnamalainagar608002TamilnaduIndia

Aluminum 5052(Al 5052)-stainless steel 316(ss 316)plates were explosively cladded with Al 1100,pure copper and ss 304 *** operational parameters viz.,standoff distance,explosive mass ratio(mass ratio of the explosive to the flyer plate)and inclination angle were varied and the results were *** advent of interlayer relocates the lower boundary of the welding window,and enhances the welding regime by 40%.A triaxial welding window,considering the influence of the third operational parameter,was developed as *** of interlayer transforms the continuous molten layer formed in the traditional Al 5052-ss 316 explosive clad interfaces into a smooth interface devoid or with a slender presence of intermetallic *** microhardness,ram tensile and shear strengths of the interlayered clads are higher than those of the traditional explosive clads,and the maximum values are witnessed for stainless steel interlaced Al 5052-ss 316 explosive clads.

关键词： microstructure strength welding window aluminum 5052 stainless steel 316 explosive cladding interlayer

Experimental and numerical studies on aluminum-stainless steel explosive cladding

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Journal of Central south University 2020年第6期27卷 1742-1753页

作者： ELANGO E saravanan s RAGHUKANDAN K Department of Mechanical Engineering Annamalai UniversityAnnamalainagar 608002India Department of Manufacturing Engineering Annamalai UniversityAnnamalainagar 608002India

In this study,the effect of varied loading ratio(mass of the explosive/mass of flyer plate)on the nature of interface,temperature and pressure developed in aluminum-steel explosive cladding is *** in the loading ratio,R,enhances the pressure developed,kinetic energy utilization and deformation work *** microstructures exhibit the formation of molten layer at few spots,owing to the increase in temperature beyond the melting point of parent *** increase in temperature and the quantum of pressure developed were determined by numerical simulation performed in Ansys AUTODYN by employing smoothed particle hydrodynamics(sPH)*** positioning of the experimental conditions on the weldability window is presented as well.

关键词： explosive cladding dissimilar metals numerical simulation microstructure weldability window

Effect of wire mesh interlayer in explosive cladding of dissimilar grade aluminum plates

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Journal of Central south University 2019年第3期26卷 604-611页

作者： saravanan s RAGHUKANDAN K PRABHAT Kumar Department of Mechanical Engineering Annamalai University Department of Manufacturing Engineering Annamalai University Department of Mechanical Engineering Indur Institute of Engineering & Technology

Explosive cladding of Al 5052–Al 1100 plate, interfaced with a stainless steel wire mesh interlayer, is attempted. Loading ratio and standoff distance were varied. An increase in loading ratio (R) and standoff distance (s) enhances the plate velocity (Vp), dynamic bend angle (β) and pressure developed (P). The interface morphology of the explosive clads confirms strong metallurgical bond between the wire mesh and aluminum plates. Further, a smooth transition from straight to undulating interlayered topography is witnessed. The introduction of a wire mesh, as interlayer, leads to an improvement in mechanical strength with a slender reduction in overall corrosion resistance of the “explosive clads”.

关键词： explosive cladding aluminum wire mesh microstructure strength