RODDA KIRAN KUMAR REDDY
@cbit.edu.in
Scopus Publications
- Modulation of buckling and vibro-acoustic characteristics in 3D graphene - foam core - MEE face sheet sandwich shells: An analytical approach
R. Kiran Kumar Reddy, Nivish George
Aerospace Science and Technology, 2026 - Vibro-Acoustic Analysis of Functionally Graded 3D Graphene Foam Core Cylindrical Sandwich Panels with CNT Composite Face Sheets
R. Kiran Kumar Reddy, A. R. Veerappan, Nivish George
International Journal of Structural Stability and Dynamics, 2025
This study investigates the vibro-acoustic characteristics of cylindrical sandwich panels with 3D graphene foam (3DGrF) cores and functionally graded carbon nanotube (FG-CNT) face sheets, which have significant potential for future engineering applications. An in-house MATHEMATICA[Formula: see text] code, based on Reddy’s third-order shear deformation theory, is developed to predict the vibro-acoustic response. The effectiveness of the advanced 3DGrF core is compared with a conventional aluminum core, demonstrating a substantial performance improvement. Additionally, the influence of the core porosity coefficient, porosity grading pattern, and CNT distribution in the face sheets is analyzed for core- and face sheet-dominant cylindrical sandwich panels to determine the optimal combination for enhanced vibro-acoustic characteristics. Detailed analysis shows that core-dominant cylindrical sandwich panels with a Non-uniform Variation of Porosity having a maximum at the Centre (NVPC) in the core and higher concentrations of CNTs at the outer surfaces and gradually reducing toward the core (FGX) in the face sheets exhibit superior vibro-acoustic performance. - Vibro-acoustic characterization of Functionally Graded Multiwalled Carbon Nanotube composite cylindrical panels: An experimental approach
R. Kiran Kumar Reddy, AR. Veerappan, Nivish George
Composites Part A Applied Science and Manufacturing, 2024 - Vibration and acoustic characteristics of aluminium-silicon carbide metal matrix composite plate under thermal environment
R Kiran Kumar Reddy, M B S Sreekara Reddy, Vinod S Bhagat
Noise and Vibration Worldwide, 2024
This paper investigates the vibration and acoustic characteristics of an aluminium-silicon carbide (Al-SiC) simply supported composite plate under thermal loads. The vibrational response induced by the temperature rise is analysed using Kirchhoff’s plate theory and the weighted integral (Galerkin) method. Additionally, the plate is acoustically modelled in conjunction with the air medium to investigate its acoustic response. The acoustic far-field radiation equation determines the plate’s sound pressure level (SPL). The findings reveal that the MMC I (65% SiC/A356.2 MMC SiC particulates reinforced, with three different sizes) plate exhibits a lower overall sound pressure level in the lower frequency range than other MMCs. Moreover, replacing the aluminium plate with the MMC I plate reduces the overall sound pressure level by 5.54 dB due to the high stiffness associated with the mixture of silicon carbide reinforcement in the aluminium matrix. - Thermo-mechanical buckling and sound radiation characteristics of 3D graphene porous core curved sandwich panels with composite facings
R. Kiran Kumar Reddy, AR. Veerappan, Nivish George, Vinod Bhagat
Thin Walled Structures, 2024 - The Influence of Curved Profiles on the Vibro-Acoustic Characteristics of Light-Weighted Sandwich Shell: An Analytical Solution
R. Kiran Kumar Reddy, Nivish George, AR. Veerappan, M. P. Arunkumar, Vinod Bhagat
International Journal of Structural Stability and Dynamics, 2023
The overall aircraft noise is significantly minimized using curved light weighted sandwich shells as an airframe element. However, there is a lack of studies on how the curvature can influence vibro-acoustic characteristics. To the best of our knowledge, this paper presents an analytical solution that predicts the vibro-acoustic characteristics of simply supported light-weighted sandwich shells with various curved profiles for the first time. Natural frequencies, displacement and velocity responses, sound pressure level (SPL), sound transmission loss (STL), and radiation efficiency are the critical parameters when analyzing vibro-acoustic characteristics of any structure and are presented in this paper. The generalized kinematic equations are established for the sandwich shells, and the governing differential equations are derived using Hamilton’s principle. The solutions are obtained using Navier’s method, and the vibration response is determined by solving the first five unknown mode coefficients. The Rayleigh Integral is used to extract the acoustic responses and is validated. In addition, the effect of face sheet to core thickness ratio [Formula: see text] of curved sandwich shells on vibro-acoustic characteristics is critically examined and presented. It is found that introducing the positive curvature to the sandwich shell reduces the bending moment, thus improves improving the vibro-acoustic characteristics in the lower frequency range. An increase in the [Formula: see text] enhances the shell’s vibro-acoustic characteristics until a threshold value [Formula: see text], beyond which the mass contribution deteriorates the characteristics. For a hyperbolic paraboloid shell [Formula: see text], this effect was observed at a lower-frequency value of 425[Formula: see text]Hz. - Thermal buckling and vibro-acoustic behaviour of functionally graded graphene polymer layered composites subjected to in-plane temperature variance
Bimal Oommen John, Fuad Umar Hassan, Nivish George, Tony Chacko, Vinod Bhagat, P Jeyaraj, R Kiran Kumar Reddy
Proceedings of the Institution of Mechanical Engineers Part L Journal of Materials Design and Applications, 2022
The current study reports the thermal buckling, vibration and acoustic characteristics of functionally graded graphene polymer layer composite plates subjected to the in-plane temperature variance. The macroscopic properties of the composites are evaluated using the modified rule of mixtures to compute the layer-wise properties of an functionally graded graphene polymer layer composite plate. The critical buckling temperature is computed and compared for various functional gradings, boundary conditions and in-plane temperature variances. The in-plane temperature variance showed a major impact on the critical thermal buckling temperature and respective mode shapes. The vibro-acoustic behaviour of the functionally graded graphene polymer layer composite plate is investigated and documented keeping critical buckling temperature as a function. With an increase in thermal load and the nature of in-plane temperature variance, the vibro-acoustic results showed significant difference in velocity and acoustic response. For functionally graded graphene polymer layer composite plate with one free edge, the difference was statistically significant as indicated by an octave band plot. We conclude that the portion of the functionally graded graphene polymer layer composite plate that is subjected to the higher temperature in an in-plane temperature variance, as well as the nature of the boundary conditions may exacerbate the effect of in-plane temperature variance and are crucial in predicting vibro-acoustic characteristics. - Sound absorption characteristics of DL-MPP with non-circular perforations using electro-acoustical model
M.B.S. Sreekara Reddy, R. Kiran Kumar Reddy
Materials Today Proceedings, 2022 - Vibro-acoustic behavior of metallic foam doubly-curved plates
R. Kiran Kumar Reddy, Nivish George, Sreejith Mohan, Vinod Bhagat, M.P. Arunkumar
Materials Today Proceedings, 2022 - Forced vibration characteristics of sandwich panel with GRPC faces and titanium core under thermal environment
Golla Sivajiraja, Vinod Bhagat, S.N. Padhi, M.P. Arunkumar, Amey Naik Dessai, R. Kiran Kumar Reddy
Materials Today Proceedings, 2022 - Free vibration response of graphene reinforced polymer composite face sheet sandwich panel under thermal environment
O S Saibaba, Golla Sivajiraja, Vinod Bhagat, M P Arunkumar, Amey Naik Dessai, R Kiran Kumar Reddy, S N Padhi
Materials Today Proceedings, 2022 - Vibration and Acoustic Characteristics of Aluminium Silicon Carbide Metal Matrix Composite Under Uniform and Non Uniform Thermal Environment
Kammuluri Baburaja, K. Venkata Subbaiah, M. P. Arunkumar, Vinod S. Bhagat, R Kiran Kumar Reddy
Silicon, 2021 - Vibro-acoustic characteristics of viscoelastic sandwich panel: effect of inherent damping
R. Kiran Kumar Reddy, M. P. Arunkumar, Vinod Bhagat, M. B. S. Sreekara Reddy
International Journal of Dynamics and Control, 2021
