Kantha K Rao - Profile on Academia.edu (original) (raw)

Papers by Kantha K Rao

Research paper thumbnail of Heat Shielding Analysis of a Hypersonic Aerospace Vehicle Structure

viXra, 2016

Hypersonic cruise vehicles are fly at Mach numbers of above five (7) and the aerodynamic heating... more Hypersonic cruise vehicles are fly at Mach numbers of above five (7) and the aerodynamic heating would be severe. Hypersonic Vehicles encounter a severe hazardous environment such as extremely high temperature plane to aerodynamic heating, fluctuating pressures, stresses for which the structures are to be designed and fabricated to withstand these environments to protect various electronic items like guidance, control and instrumentation systems housed in the vehicle structure. High temperature of the order of 1500 0 C and above during the hypersonic flight causes enormous thermal stresses. Inconel-617 is a Nickel based alloy. Hence Inconel-617 is employed as a sandwich material. Theoretical & ANSYS modeling analysis have been done for both, the square and hexagonal honeycomb panels of Inconel-617 material have been performed to suit the hypersonic flight conditions. The honeycomb structures are built from thin walled metal sheets. These structures as a part of the airframe outer cover provide thermal protection to the interior parts mounted inside the vehicle. This paper is to perform geometrical (shape) analysis of different candidate honeycomb cells that have the same effective density but different geometrical shapes. To perform heat-transfer analysis of hypersonic aerospace vehicle structure with different honeycomb cell geometry.

Research paper thumbnail of TECHNOLOGY Heat Insulation Analysis of an Aluminum Honeycomb Sandwich Structure

Heat-transfer has been performed on a sandwich thermal protection system (TPS) for future flight ... more Heat-transfer has been performed on a sandwich thermal protection system (TPS) for future flight vehicles. The sandwich structures are built from thin walled metal sheets. These structures as a part of the airframe outer cover provide thermal protection to the interior parts mounted inside the vehicle. The temperature protection materials used for sandwich structures should have high strength even at the elevated temperatures. It is easier to simulate the 1500 C temperature on the Aluminum sandwich structures and find the temperature gradient across the sandwich depth. Though the experiment was done on hexagonal cells honeycomb, the ANSYS analyses have been done for both square cell sandwich panel and hexagonal honeycomb panel for comparison. Experiments are done on using Al alloy honeycomb sandwich panels and the validations of experimental work using ANSYS analysis have been performed. ANSYS modeling analysis have been done for both, the square and hexagonal honeycomb sandwich pan...

Research paper thumbnail of Strength Analysis on Honeycomb Sandwich Panels of different Materials

Aluminum sandwich construction has been recognized as a promising concept for structural design o... more Aluminum sandwich construction has been recognized as a promising concept for structural design of light weight systems such as wings of aircraft. A sandwich construction, which consists of two thin facing layers separated by a thick core, offers various advantages for design of weight critical structure. Depending on the specific mission requirements of the structures, aluminum alloys, high tensile steels, titanium or composites are used as the material of facings skins. Several core shapes and material may be utilized in the construction of sandwich among them, it has been known that the aluminum honeycomb core has excellent properties with regard to weight savings and fabrication costs.This paper is theoretically calculate

Research paper thumbnail of Thermostructural Analysis of Honeycomb Sandwich Panels

Thermostructural Analysis of Honeycomb Sandwich Panels

The thermal analysis is performed on a heated Inco nel 617 honeycomb-core sandwich panel. Sandwic... more The thermal analysis is performed on a heated Inco nel 617 honeycomb-core sandwich panel. Sandwich pan el is supported at its four edges with spar-like sub-structures that acted as h eat sinks, which are generally not considered in th e classical analysis. One side of the panel is subjected to a heat flux on the surfac e. Two types of surface heating were considered: (1 ) hexagonal honeycomb sandwich panels, and (2) square honeycomb sandwich panel, wh ich approximates the actual surface temperature dis tribution associated with the existence of edge heat sinks. The finite-elemen t thod is used to find the thermal stress distrib u ions in the face sheets and core of the sandwich panel. The detailed thermal stress dis tributions in the sandwich panel are presented. Thi s technical report presents comprehensive, 3D graphical displays of thermal str ess distributions in every part of a Inconel 617 ho neycomb-core sandwich panel and also shows the comparison of effective heat tra nsfer r...

Research paper thumbnail of Bending Behavior of Aluminum Honey Comb Sandwich Panels

Aluminum sandwich construction has been recognized as a promising concept for structural design o... more Aluminum sandwich construction has been recognized as a promising concept for structural design of light weight systems such as wings of aircraft. A sandwich construction, which consists of two thin facing layers separated by a thick core, offers various advantages for design of weight critical structure. Depending on the specific mission requirements of the structures, aluminum alloys, high tensile steels, titanium or composites are used as the material of facings skins. Several core shapes and material may be utilized in the construction of sandwich among them, it has been known that the aluminum honeycomb core has excellent properties with regard to weight savings and fabrication costs. This paper is theoretically calculate bending behavior, of sandwich panels and to compare the strength to weight ratios of Normal Aluminium rod(panel) and Aluminium Honey Comb Panel .

Research paper thumbnail of Heat Shielding Analysis of a Hypersonic Aerospace Vehicle Structure

viXra, 2016

Hypersonic cruise vehicles are fly at Mach numbers of above five (7) and the aerodynamic heating... more Hypersonic cruise vehicles are fly at Mach numbers of above five (7) and the aerodynamic heating would be severe. Hypersonic Vehicles encounter a severe hazardous environment such as extremely high temperature plane to aerodynamic heating, fluctuating pressures, stresses for which the structures are to be designed and fabricated to withstand these environments to protect various electronic items like guidance, control and instrumentation systems housed in the vehicle structure. High temperature of the order of 1500 0 C and above during the hypersonic flight causes enormous thermal stresses. Inconel-617 is a Nickel based alloy. Hence Inconel-617 is employed as a sandwich material. Theoretical & ANSYS modeling analysis have been done for both, the square and hexagonal honeycomb panels of Inconel-617 material have been performed to suit the hypersonic flight conditions. The honeycomb structures are built from thin walled metal sheets. These structures as a part of the airframe outer cover provide thermal protection to the interior parts mounted inside the vehicle. This paper is to perform geometrical (shape) analysis of different candidate honeycomb cells that have the same effective density but different geometrical shapes. To perform heat-transfer analysis of hypersonic aerospace vehicle structure with different honeycomb cell geometry.

Research paper thumbnail of TECHNOLOGY Heat Insulation Analysis of an Aluminum Honeycomb Sandwich Structure

Heat-transfer has been performed on a sandwich thermal protection system (TPS) for future flight ... more Heat-transfer has been performed on a sandwich thermal protection system (TPS) for future flight vehicles. The sandwich structures are built from thin walled metal sheets. These structures as a part of the airframe outer cover provide thermal protection to the interior parts mounted inside the vehicle. The temperature protection materials used for sandwich structures should have high strength even at the elevated temperatures. It is easier to simulate the 1500 C temperature on the Aluminum sandwich structures and find the temperature gradient across the sandwich depth. Though the experiment was done on hexagonal cells honeycomb, the ANSYS analyses have been done for both square cell sandwich panel and hexagonal honeycomb panel for comparison. Experiments are done on using Al alloy honeycomb sandwich panels and the validations of experimental work using ANSYS analysis have been performed. ANSYS modeling analysis have been done for both, the square and hexagonal honeycomb sandwich pan...

Research paper thumbnail of Strength Analysis on Honeycomb Sandwich Panels of different Materials

Aluminum sandwich construction has been recognized as a promising concept for structural design o... more Aluminum sandwich construction has been recognized as a promising concept for structural design of light weight systems such as wings of aircraft. A sandwich construction, which consists of two thin facing layers separated by a thick core, offers various advantages for design of weight critical structure. Depending on the specific mission requirements of the structures, aluminum alloys, high tensile steels, titanium or composites are used as the material of facings skins. Several core shapes and material may be utilized in the construction of sandwich among them, it has been known that the aluminum honeycomb core has excellent properties with regard to weight savings and fabrication costs.This paper is theoretically calculate

Research paper thumbnail of Thermostructural Analysis of Honeycomb Sandwich Panels

Thermostructural Analysis of Honeycomb Sandwich Panels

The thermal analysis is performed on a heated Inco nel 617 honeycomb-core sandwich panel. Sandwic... more The thermal analysis is performed on a heated Inco nel 617 honeycomb-core sandwich panel. Sandwich pan el is supported at its four edges with spar-like sub-structures that acted as h eat sinks, which are generally not considered in th e classical analysis. One side of the panel is subjected to a heat flux on the surfac e. Two types of surface heating were considered: (1 ) hexagonal honeycomb sandwich panels, and (2) square honeycomb sandwich panel, wh ich approximates the actual surface temperature dis tribution associated with the existence of edge heat sinks. The finite-elemen t thod is used to find the thermal stress distrib u ions in the face sheets and core of the sandwich panel. The detailed thermal stress dis tributions in the sandwich panel are presented. Thi s technical report presents comprehensive, 3D graphical displays of thermal str ess distributions in every part of a Inconel 617 ho neycomb-core sandwich panel and also shows the comparison of effective heat tra nsfer r...

Research paper thumbnail of Bending Behavior of Aluminum Honey Comb Sandwich Panels

Aluminum sandwich construction has been recognized as a promising concept for structural design o... more Aluminum sandwich construction has been recognized as a promising concept for structural design of light weight systems such as wings of aircraft. A sandwich construction, which consists of two thin facing layers separated by a thick core, offers various advantages for design of weight critical structure. Depending on the specific mission requirements of the structures, aluminum alloys, high tensile steels, titanium or composites are used as the material of facings skins. Several core shapes and material may be utilized in the construction of sandwich among them, it has been known that the aluminum honeycomb core has excellent properties with regard to weight savings and fabrication costs. This paper is theoretically calculate bending behavior, of sandwich panels and to compare the strength to weight ratios of Normal Aluminium rod(panel) and Aluminium Honey Comb Panel .