Dr Sadashiva M
@pescemandya.org
Assistant Professor
PES College of Engineering, Mandya
RESEARCH INTERESTS
Friction stir welding, Composite materials, Manufacturing science, advanced material technology.
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
M.R. Srinivasa, Y.S. Rammohan, M. Sadashiva, M.K. Yathish, K. Ramesha, and Shijo Thomas
MAFTREE
Aluminium composite plays a significant role in the mechanical structures. Low tensile strength of the aluminium alloy limits its application in mechanical structures. Graphene hydroxyl (GrOH) is a noble emerging material which is an allotropic form of carbon. It has high cohesive strength, good bonding ability with other materials. Carbon bonds processes high compatibility when it reinforced with other material. Reinforcement of GrOH with aluminium composites enhances the wear strength of composite material. This paper focused on analysis of tensile properties and percentage elongation of aluminium composites reinforced with GrOH with various weight percentage (wt. %). The characteristics of aluminium composites, particularly related to its tensile properties are very much important for its use in vehicle structures applications.
M. Sadashiva, N.M. Siddeshkumar, J. Monica, M.R. Srinivasa, N. Santhosh, and S. Praveenkumar
MAFTREE
Aluminium and its alloys have an excellent mechanical property in that metal matrix composite has a promising role in the field of automobile and aviation. This work aims to investigate the hardness and impact strength of aluminium Al2024, Al6061 and Al7075 alloy reinforced with a weight fraction of fine greenish silicon carbide 7% and chopped E-glass fiber 3%. The metal matrix composite plates were welded by using the friction stir welding process at 550, 850 and 1150 rpm with a feed rate of 40, 80, 120 mm/min. Hardness specimens are prepared as per ASTM-E-92 and investigated the hardness of welded and unwelded (base metals and composite metal) in nugget zone, HAZ and TMAZ with the help of Vickers hardness test machine. Impact strength specimens are prepared as per ASTM-E-23. The results were compared with welded and unwelded aluminium specimens.
H.K. Shivanand, M. Sadashiva, Paraveej Shirahatti, and S. ShivaPrakash
Elsevier BV
Gujjala Anil Babu, M. Sadashiva, Ranjith R. Hombal, and D. Aravinda
Elsevier BV
N. M. Siddesh Kumar, T. N. Shashank, N. U. Dheeraj, Dhruthi, Amir Kordijazi, Pradeep K. Rohatgi, and M. Sadashiva
Springer Science and Business Media LLC
N.M. Siddesh Kumar, Dhruthi, G.K. Pramod, P. Samrat, and M. Sadashiva
Elsevier BV
M Sadashiva, S Praveen Kumar, M K Yathish, V T Satish, MR Srinivasa, and V Sharanraj
IOP Publishing
Abstract The extensive applications of hybrid composite materials in the field of transportation and structural domine provide prominent advantages in the order of stiffness, strength even cost. However extend the advantages of hybrid campsites in several field such as aviation and marine even more additional properties should be inculcate in them. During production of such profitable composites poses some problems at time at decompose and processing. It’s better to develop environment friendly and reusable composites, bio hybrid composite materials such of the one. In this paper, focused on development of Eco-friendly hybrid bio composites with the ingredients of drumstick fibers, glass fiber along with polyester resin. This hybrid bio composites subjected to bending test and evaluate the characteristics of bending properties, this research evident that bending characteristics of hybrid composites with longitudinal fiber orientation better than transverse.
N.M. Siddesh Kumar, M. Sadashiva, J. Monica, and S. Praveen Kumar
Elsevier BV
M. R. Srinivasa, Y. S. Rammmohan, and M. Sadashiva
Springer Singapore
V. Sharanraj, C. M. Ramesha, K. Kavya, Vasantha Kumar, M. Sadashiva, B. R. Chandan, and M. Naveen Kumar
Informa UK Limited
ABSTRACT Zirconia is a bioinert ceramic biomaterial. Zirconia having composition of 97% Zirconia oxide and 3% Yttria oxide finds its vital application in the field of dental ceramics as an implant material for having good inert characteristics like minimum interaction with the adjacent tissues and exhibits good aesthetic property. This paper presents the in-vitro tests conducted to evaluation toxicity by cell culturing on zirconia biomaterial used in the dental implant by both direct contact and extraction method. In the present study, in-vitro assessment of tissue biocompatibility was conducted on L929 cell line (mouse fibroblast). In-vitro test, the toxicity of Zirconia specimen was done by computing percentage of viability in a cell-cultured medium. An MTT system was used to measure the active cell activities with mitochondrial dehydrogenases, which is an easy method which gives accurate and precision results. The results of biocompatibility in-vitro test by both Direct and Extraction methods confirmed that Zirconia exhibits the highest cell growth of 93.17% and resulted with zero-grade cytotoxicity. Zirconia having good aesthetic characteristics, i.e. colour of the implant matches with the tooth colour. Hence Zirconia is a candidate implant material than other metal implants.
M. R. Srinivasa, Y. S. Rammohan, and M. Sadashiva
AIP Publishing
The Aluminium metal components have proved their suitability in the field of aerospace industry, naval, sports, and other structural applications by their advantageous properties. Aluminum as base material has disadvantageous properties like high wear rate, less hardness which limits its application for distinguished applications. Carbon has unique characteristic of high strength and hardness due to four valance electrons (Tetra Valant) available for bonding. Diamond and Graphite are the two allotropes of carbon. Graphene is an allotropic form of carbon derived from graphite which exhibits high tensile strength, better co-efficient of friction and easily derivable material. Reinforcement of Graphene with Aluminium 6061improves the properties of base material and makes it more suitable for special applications. Surface hardness is one of the important properties required for applications where more wear is observed. Shock waves produced by blasting the membranes with high pressure and make them hit the surface of the specimen enhances the hardness of the material by strain hardening [1]. This paper focuses on discussion about the enhancement of surface hardness of Al6061t0 composed with various percentage of Graphene Hydroxyl.
M. Sadashiva and J. V. Abhishek
AIP Publishing
V. Sharanraj, C.M. Ramesha, V. Kumar, and M. Sadashiva
Springer Science and Business Media LLC
Abstract: Zirconia is an advanced ceramic material widely used in dental implants because of its good inert characteristics like minimum interaction and good aesthetic properties. The finite element method (FEM) is an effective approach for the analysis of dental implants and dental structures. In the present work, a three-dimensional (3D) model of a molar tooth was generated by CATIA V5 software, and an analysis was carried out by the commercial FEA (Finite Element Analysis) software Ansys 14.5 to evaluate the displacement, strain, stress, fatigue life and factor of safety in the proximal region of the zirconia molar tooth implant under static load conditions of 50, 100, 150, 200, 250 and 300 N. The results show that the displacement, strain and stresses, fatigue life and factor of safety were within the material admissible limits for zirconia. Hence, the study reveals that zirconia can be a candidate biomaterial suitable for dental implants as compared to metal implants.
M. Sadashiva, H. K. Shivanand, and H. N. Vidyasagar
Author(s)
The Current work is aimed to investigate the effect of process parameters in friction stir welding of Aluminium 2024 base alloy and Aluminium 2024 matrix alloy reinforced with E Glass and Silicon Carbide reinforcements. The process involved a set of synthesis techniques incorporating stir casting methodology resulting in fabrication of the composite material. This composite material that is synthesized is then machined to obtain a plate of dimensions 100 mm * 50 mm * 6 mm. The plate is then friction stir welded at different set of parameters viz. the spindle speed of 600 rpm, 900 rpm and 1200 rpm and feed rate of 40 mm/min, 80 mm/min and 120 mm/min for analyzing the process capability. The study of the given set of parameters is predominantly important to understand the physics of the process that may lead to better properties of the joint, which is very much important in perspective to its use in advanced engineering applications, especially in aerospace domain that uses Aluminium 2024 alloy for wing and fuselage structures under tension.The Current work is aimed to investigate the effect of process parameters in friction stir welding of Aluminium 2024 base alloy and Aluminium 2024 matrix alloy reinforced with E Glass and Silicon Carbide reinforcements. The process involved a set of synthesis techniques incorporating stir casting methodology resulting in fabrication of the composite material. This composite material that is synthesized is then machined to obtain a plate of dimensions 100 mm * 50 mm * 6 mm. The plate is then friction stir welded at different set of parameters viz. the spindle speed of 600 rpm, 900 rpm and 1200 rpm and feed rate of 40 mm/min, 80 mm/min and 120 mm/min for analyzing the process capability. The study of the given set of parameters is predominantly important to understand the physics of the process that may lead to better properties of the joint, which is very much important in perspective to its use in advanced engineering applications, especially in aerospace domain that uses Aluminium 2024 alloy for wing and...
Sadashiva M and Shivanand H K
Science Publishing Corporation
Aluminium Alloy 2024 metal-matrix composites fortified with Silicon carbide fine greenish particulates show enhanced mechanical properties like high toughness , high flexible modulus, and good resist wear, which makes them promising auxiliary materials for automobile field and aviation enterprises. Notwithstanding, these composites likewise demonstrate poor in malleability and ductility because of reinforce of non-deformable ceramic particulates, which restrains their wide applications to a specific degree, stifle this by strengthen arbitrary spasmodic E-glass fibers and exceeds expectations structure with higher sturdiness. The Current work is meant to examine the process parameters of friction stir welding on Aluminium metal matrix composite plates of measurement 100mmx50mmx6 mm joined by the high carbon high chromium tool, rotational speed of 600rpm, 900rpm and 1200 rpm also compiled welding speed rate of 40 mm/min, 80mm/min and 120 mm/min, Followed via completed Charpy Impact test on ASTM standard samples, classify the effect quality and contrasted and that of unreinforced matrix.