Dr B G Sumana - Academia.edu (original) (raw)

Papers by Dr B G Sumana

Research paper thumbnail of Evaluation of Wear Properties of Heat-treated Al 7075/Graphite Powder/Bagasse ash Hybrid Metal Matrix Composites

International Journal of Scientific Research in Science and Technology, 2019

This research work investigated the in?uence of graphite powder on the wear behavior of Al 7075/G... more This research work investigated the in?uence of graphite powder on the wear behavior of Al 7075/Graphite Powder (Gr)/Bagasse ash (BA) hybrid composite. The investigation reveals the effectiveness of incorporation of graphite powder in the composite for gaining wear reduction. The Al 7075 (Aluminium alloy 7075) reinforced with graphite powder and Bagasse ash were investigated. The conventional liquid casting technique was used for the fabrication of composite material and subjected to T6 heat treatment. The reinforcement content was chosen as 1, 3, and 5wt. % of graphite powder to identify its potential for self-lubricating property under dry sliding conditions. Hybrid composite is processed at 1wt% of Gr with 2, 4 and 6wt% of BA. The effect of load on dry sliding wear rate and coefficient of friction performance of Al 7075 casting alloy and its composites was evaluated by using a pin-on-disc with two different loads with constant speed at room temperature. Wear tests were conducted ...

Research paper thumbnail of Investigation of the Effect of Fiber Orientation on FML Hollow Shaft Subjected to Static Torsion Loading

Journal of Theoretical and Computational Science, 2015

In this study, the torsional behavior of cylindrical FML hollow shafts was examined by a combined... more In this study, the torsional behavior of cylindrical FML hollow shafts was examined by a combined experimental and numerical approach. The FML hollow shafts with glass fibers wound on Al metallic liner at different fiber orientations were prepared using filament winding machine. To examine the effect of fiber orientation, FML hollow shafts of 0/90°, 60/30°, ± 45° and ± 55° fiber orientations were considered. Three different FRP thicknesses of 1, 2 and 3 mm were selected for all fiber orientations to study the torsional buckling and deformation behaviour of FML hollow shafts. Numerical investigation using ANSYS static and linear analysis was performed to validate the end and transition effects of torsional phenomenon. Both the experimental and numerical results showed FML hollow shafts with 0/90° fiber orientation possessed higher torsional strength as compared to FML hollow shafts with 60/30°, ± 45° and ± 55° fiber orientation.

Research paper thumbnail of Numerical analysis of the effect of fiber orientation on hydrostatic buckling behavior of fiber metal composite cylinder

Journal of Reinforced Plastics and Composites, 2015

The external hydrostatic buckling behavior of fiber metal laminate (FML) composite cylinders was ... more The external hydrostatic buckling behavior of fiber metal laminate (FML) composite cylinders was investigated numerically. The critical buckling pressure predicted by eigenvalue analysis was compared with experimental results. The numerical results showed different modes of buckling and buckling deformation for cylinders of different fiber orientation when subjected to external hydrostatic loading. FML cylinder with 0°/90° fiber orientation exhibited higher buckling strength and lower buckling deformation as compared to FML cylinders of 60°/30°, ±45°, and ±55° fiber orientations. The orientation of fiber has significant influence on the performance of FML composite cylinder as compared to fiber-reinforced plastic thickness. The correlation between numerical and experimental results is discussed in terms of buckling strength, circumferential stiffness, and buckling deformations. It was observed that the cylinders were less sensitive to initial imperfections irrespective of fiber-rein...

Research paper thumbnail of Numerical Analysis of Stresses on Layer-by-Layer Basis in FML Composite Cylinder Subjected to External Hydrostatic Loading

Materials Sciences and Applications, 2015

The aim of the research work was to numerically investigate the residual stresses induced between... more The aim of the research work was to numerically investigate the residual stresses induced between the layers of fiber metal laminate (FML) cylinder (glass/epoxy reinforced aluminum laminates) under buckling hydrostatic loading. For the analysis of buckling behavior of FML cylinders, various fiber orientations such as 0/90˚, 60/30˚, ±45˚ and ±55˚ and different FRP thickness of 1, 2, and 3 mm were considered. The aluminum cylinder of inner diameter 80 mm, length 800 mm and wall thickness 1 mm was modeled with SHELL281 element type and a total of 1033 elements were used for computing the induced residual stresses between the layers. The results show that magnitude of residual stresses between the layers decreased along the thickness from outer layer towards the inner layer in sine wave form. The maximum residual Von-Mises stress was at inner aluminum layer while the maximum residual radial stress was at the outermost layer of FML cylinder due to the inward pressure. Among all types of FML cylinder 0/90˚ fiber oriented FML cylinder exhibited the least radial stress and a maximum Von-Mises stress along the FRP thickness.

Research paper thumbnail of Investigation of Burst Pressure on Carbon / Glass Fiber Reinforced Polymer Metal Tube for High Pressure Applications

Procedia Materials Science, 2014

Research paper thumbnail of Effect of MWCNT inclusions on tensile behavior of G-CFRP and G-KFRP hybrid nanocomposites

AIP Conference Proceedings, 2019

The prime objective of this investigation is to systematically develop the fiber reinforced polym... more The prime objective of this investigation is to systematically develop the fiber reinforced polymeric hybrid nano composites with tailored morphology in order to achieve high tensile strength and interfacial bonding. Conceptual approach of hybridizing the composite is to tailor the properties to meet the desired strength requirements and overall economy of the material. Furthermore, functionalized multi walled carbon nano tubes (MWCNTs) added as particulate reinforcement inclusion by homogenization using ultrasonic dispersion technique into epoxy resin. The tensile properties of Carbon fiber and Glass fiber Reinforced Plastics (G-CFRP) hybrid composite was investigated and compared with the nano reinforcement of COOH functionalized multi walled carbon nano tubes (MWCNTs) at different volume fractions, similarly for G-KFRP compared with same grades of MWCNT integrations. In the investigation, it was found that tensile strength of composite is proportional to the volume fraction of high modulus and low modulus fibers. In turn, by introducing, the CNTs enhanced the interlaminar bonding strength of the composite; hence, tensile strength was intensified in the composites. Addition of MWCNTs in G-CFRP composites by 0.5%, 1.0% and 1.5% volume fraction enhanced the tensile strength by 24%, 35% and 26 % and Young’s modulus by 10%, 38% and 34% respectively. Whereas in G-KFRP composites, strength was increased by 16%, 31%, 27% and Young’s Modulus by 36%, 60% and 52% respectively.The prime objective of this investigation is to systematically develop the fiber reinforced polymeric hybrid nano composites with tailored morphology in order to achieve high tensile strength and interfacial bonding. Conceptual approach of hybridizing the composite is to tailor the properties to meet the desired strength requirements and overall economy of the material. Furthermore, functionalized multi walled carbon nano tubes (MWCNTs) added as particulate reinforcement inclusion by homogenization using ultrasonic dispersion technique into epoxy resin. The tensile properties of Carbon fiber and Glass fiber Reinforced Plastics (G-CFRP) hybrid composite was investigated and compared with the nano reinforcement of COOH functionalized multi walled carbon nano tubes (MWCNTs) at different volume fractions, similarly for G-KFRP compared with same grades of MWCNT integrations. In the investigation, it was found that tensile strength of composite is proportional to the volume fraction of high modulus and low modu...

Research paper thumbnail of Evaluation of Wear Properties of Heat-treated Al 7075/Graphite Powder/Bagasse ash Hybrid Metal Matrix Composites

International Journal of Scientific Research in Science and Technology, 2019

This research work investigated the in?uence of graphite powder on the wear behavior of Al 7075/G... more This research work investigated the in?uence of graphite powder on the wear behavior of Al 7075/Graphite Powder (Gr)/Bagasse ash (BA) hybrid composite. The investigation reveals the effectiveness of incorporation of graphite powder in the composite for gaining wear reduction. The Al 7075 (Aluminium alloy 7075) reinforced with graphite powder and Bagasse ash were investigated. The conventional liquid casting technique was used for the fabrication of composite material and subjected to T6 heat treatment. The reinforcement content was chosen as 1, 3, and 5wt. % of graphite powder to identify its potential for self-lubricating property under dry sliding conditions. Hybrid composite is processed at 1wt% of Gr with 2, 4 and 6wt% of BA. The effect of load on dry sliding wear rate and coefficient of friction performance of Al 7075 casting alloy and its composites was evaluated by using a pin-on-disc with two different loads with constant speed at room temperature. Wear tests were conducted ...

Research paper thumbnail of Investigation of the Effect of Fiber Orientation on FML Hollow Shaft Subjected to Static Torsion Loading

Journal of Theoretical and Computational Science, 2015

In this study, the torsional behavior of cylindrical FML hollow shafts was examined by a combined... more In this study, the torsional behavior of cylindrical FML hollow shafts was examined by a combined experimental and numerical approach. The FML hollow shafts with glass fibers wound on Al metallic liner at different fiber orientations were prepared using filament winding machine. To examine the effect of fiber orientation, FML hollow shafts of 0/90°, 60/30°, ± 45° and ± 55° fiber orientations were considered. Three different FRP thicknesses of 1, 2 and 3 mm were selected for all fiber orientations to study the torsional buckling and deformation behaviour of FML hollow shafts. Numerical investigation using ANSYS static and linear analysis was performed to validate the end and transition effects of torsional phenomenon. Both the experimental and numerical results showed FML hollow shafts with 0/90° fiber orientation possessed higher torsional strength as compared to FML hollow shafts with 60/30°, ± 45° and ± 55° fiber orientation.

Research paper thumbnail of Numerical analysis of the effect of fiber orientation on hydrostatic buckling behavior of fiber metal composite cylinder

Journal of Reinforced Plastics and Composites, 2015

The external hydrostatic buckling behavior of fiber metal laminate (FML) composite cylinders was ... more The external hydrostatic buckling behavior of fiber metal laminate (FML) composite cylinders was investigated numerically. The critical buckling pressure predicted by eigenvalue analysis was compared with experimental results. The numerical results showed different modes of buckling and buckling deformation for cylinders of different fiber orientation when subjected to external hydrostatic loading. FML cylinder with 0°/90° fiber orientation exhibited higher buckling strength and lower buckling deformation as compared to FML cylinders of 60°/30°, ±45°, and ±55° fiber orientations. The orientation of fiber has significant influence on the performance of FML composite cylinder as compared to fiber-reinforced plastic thickness. The correlation between numerical and experimental results is discussed in terms of buckling strength, circumferential stiffness, and buckling deformations. It was observed that the cylinders were less sensitive to initial imperfections irrespective of fiber-rein...

Research paper thumbnail of Numerical Analysis of Stresses on Layer-by-Layer Basis in FML Composite Cylinder Subjected to External Hydrostatic Loading

Materials Sciences and Applications, 2015

The aim of the research work was to numerically investigate the residual stresses induced between... more The aim of the research work was to numerically investigate the residual stresses induced between the layers of fiber metal laminate (FML) cylinder (glass/epoxy reinforced aluminum laminates) under buckling hydrostatic loading. For the analysis of buckling behavior of FML cylinders, various fiber orientations such as 0/90˚, 60/30˚, ±45˚ and ±55˚ and different FRP thickness of 1, 2, and 3 mm were considered. The aluminum cylinder of inner diameter 80 mm, length 800 mm and wall thickness 1 mm was modeled with SHELL281 element type and a total of 1033 elements were used for computing the induced residual stresses between the layers. The results show that magnitude of residual stresses between the layers decreased along the thickness from outer layer towards the inner layer in sine wave form. The maximum residual Von-Mises stress was at inner aluminum layer while the maximum residual radial stress was at the outermost layer of FML cylinder due to the inward pressure. Among all types of FML cylinder 0/90˚ fiber oriented FML cylinder exhibited the least radial stress and a maximum Von-Mises stress along the FRP thickness.

Research paper thumbnail of Investigation of Burst Pressure on Carbon / Glass Fiber Reinforced Polymer Metal Tube for High Pressure Applications

Procedia Materials Science, 2014

Research paper thumbnail of Effect of MWCNT inclusions on tensile behavior of G-CFRP and G-KFRP hybrid nanocomposites

AIP Conference Proceedings, 2019

The prime objective of this investigation is to systematically develop the fiber reinforced polym... more The prime objective of this investigation is to systematically develop the fiber reinforced polymeric hybrid nano composites with tailored morphology in order to achieve high tensile strength and interfacial bonding. Conceptual approach of hybridizing the composite is to tailor the properties to meet the desired strength requirements and overall economy of the material. Furthermore, functionalized multi walled carbon nano tubes (MWCNTs) added as particulate reinforcement inclusion by homogenization using ultrasonic dispersion technique into epoxy resin. The tensile properties of Carbon fiber and Glass fiber Reinforced Plastics (G-CFRP) hybrid composite was investigated and compared with the nano reinforcement of COOH functionalized multi walled carbon nano tubes (MWCNTs) at different volume fractions, similarly for G-KFRP compared with same grades of MWCNT integrations. In the investigation, it was found that tensile strength of composite is proportional to the volume fraction of high modulus and low modulus fibers. In turn, by introducing, the CNTs enhanced the interlaminar bonding strength of the composite; hence, tensile strength was intensified in the composites. Addition of MWCNTs in G-CFRP composites by 0.5%, 1.0% and 1.5% volume fraction enhanced the tensile strength by 24%, 35% and 26 % and Young’s modulus by 10%, 38% and 34% respectively. Whereas in G-KFRP composites, strength was increased by 16%, 31%, 27% and Young’s Modulus by 36%, 60% and 52% respectively.The prime objective of this investigation is to systematically develop the fiber reinforced polymeric hybrid nano composites with tailored morphology in order to achieve high tensile strength and interfacial bonding. Conceptual approach of hybridizing the composite is to tailor the properties to meet the desired strength requirements and overall economy of the material. Furthermore, functionalized multi walled carbon nano tubes (MWCNTs) added as particulate reinforcement inclusion by homogenization using ultrasonic dispersion technique into epoxy resin. The tensile properties of Carbon fiber and Glass fiber Reinforced Plastics (G-CFRP) hybrid composite was investigated and compared with the nano reinforcement of COOH functionalized multi walled carbon nano tubes (MWCNTs) at different volume fractions, similarly for G-KFRP compared with same grades of MWCNT integrations. In the investigation, it was found that tensile strength of composite is proportional to the volume fraction of high modulus and low modu...