Influence of Concentric Cutouts on Axially Compressed Laminated Shell Panel Buckling Behavior Hukum Chand Dewangan, Nitin Sharma, Prashik Malhari Ramteke, Subrata Kumar Panda International Journal of Applied Mechanics, 2026 This study presents a numerical assessment of the critical buckling behavior of various geometrical configurations of laminated composite flat/curved panels featuring concentric cutouts of different shapes and dimensions. A finite element formulation, incorporating higher-order kinematic assumptions, is employed to model the multi-layered structure with accuracy. An isoparametric element framework is used to simulate the panel geometry, with the cutout represented through a quarter-plate modeling technique and extended to form the complete configuration. The approach is verified by benchmarking its results against those available in the published literature. The predicted normalized critical buckling loads show excellent agreement with three-dimensional elasticity with deviations generally within ±2%. In contrast, classical laminate plate theory (CLPT) exhibits significantly larger deviations reaching up to about 38%, highlighting the importance of higher-order shear deformation effects. Also, the present HSDT predictions differ by only 0.86–6.99% from experimental results. The model is further tested for its adaptability across various geometrical forms, such as flat plates, cylindrical, spherical, hyperbolic and elliptical surfaces, under different material systems and boundary settings. The findings highlight the significance of using a higher-order numerical strategy in predicting accurate modal characteristics of perforated laminated composites. A series of case studies is conducted to examine the influence of critical design parameters such as aspect ratio, thickness, curvature and boundary conditions. The study underscores the necessity of advanced modeling techniques for effective structural analysis of composite components with geometric discontinuities.
Dynamic Analysis of Cracked Functionally Graded Curved Panels with Porosity Variation Prashik Malhari Ramteke, Kinshuk Maitra, Hukum Chand Dewangan International Journal of Structural Stability and Dynamics, 2026 This study investigates the free-vibration behavior of cracked functionally graded material (FGM) curved panels, considering variable porosity and different material grading patterns. A higher-order displacement theory is utilized to develop the mathematical model, and the Galerkin weak formulation of the vibration problem is obtained using Hamilton’s principle. The numerical solution is obtained through the isoparametric finite element method, and a customized computational code is developed to evaluate the natural frequencies of damaged FG structures. Three material grading patterns — exponential, sigmoid, and power-law distributions — are considered, along with both even and uneven porosity distributions through the thickness. The effects of several key parameters, including crack length ratio, porosity index, grading pattern, aspect ratio, thickness-to-length ratio, curvature ratio, power-law exponent, and boundary conditions, on the vibration characteristics of FG panels are systematically examined. The results demonstrate that porosity distribution, crack size, and material grading significantly influence the structure’s natural frequencies, providing useful insights for the design and analysis of cracked porous FG curved panels.
Thermomechanical deflection responses of porous functionally graded curved panel structures using higher-order FEM Prashik Malhari Ramteke, Hukum Chand Dewangan, Nitin Sharma, S.D.V.S.S. Varma Siruvuri, Subrata Kumar Panda Engineering Computations Swansea Wales, 2025 Purpose The purpose of this article is to study the thermomechanical deflection responses of functionally graded (FG) doubly curved shell panels. The study has been extended to analyze the influence of variable design parameters on the deflection responses of FG panels. Design/methodology/approach A computer code is developed in MATLAB to compute deflection parameters, utilizing the mathematical formulation, including the temperature-dependent (TMDP) and independent (TIDP) properties of the graded structure to ensure the real-time characteristics of the structure/structural components in service. The responses are obtained by solving the system governing differential equations through the variational technique in association with the finite element (FE) technique. Findings The FE solution consistency is verified by checking the mesh independence test. Additionally, the model accuracy is established by comparing the deflection values with those published results available in the public domain. Further, a few numerical experiments are carried out for different parameters (material and geometry) to check the derived model's adaptability for the thermomechanical deflection prediction of graded structures. The outcomes against the loading, geometrical forms and parameters are discussed in detail. Originality/value The analysis brings clarity regarding the requirement of the present developed mathematical model to address the influence of a variety of design-associated parameters on the static deflection responses of the FG curved panels, considering TMDP material properties.
Nonlinear static and dynamic (deflection/stress) responses of porous functionally graded shell panel and experimental validation Prashik Malhari Ramteke, Subrata Kumar Panda Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science, 2023 The static and dynamic characteristics of functionally graded (FG) structures have been investigated in this article, considering full geometrical nonlinearity. The finite element (FE) solutions are obtained for the graded panel by modelling through higher-order kinematics (HSDT) and Green-Lagrange strain-displacement relations (GLNST). The desired graded panel properties are obtained through Voigt’s micromechanical approach, considering different grading patterns (exponential, EPL; sigmoid, SGM and power law, POL). Additionally, to maintain the generality of the graded structure, different porosity distribution types (even and uneven, EVP and UEP) are incorporated into the proposed mathematical model. Further, the numerical solutions are obtained using Newmark’s method’s direct iterative technique and constant integration steps. The solution sensitivities are verified for the developed algorithm via adequate convergence and comparison tests. In addition, the experimental validation is performed using the layerwise fabricated luffa-fibre reinforced FG plates to validate the proposed theoretical model’s accuracy. Lastly, the responses are computed using the newly derived model for the variable design-dependent parameters associated with the FG structural geometry and properties. The final deliverables, that is the nonlinear deflection responses (NDFR)/stress values, are discussed under mechanical loadings (static and dynamic).
Nonlinear Thermomechanical Static and Dynamic Responses of Bidirectional Porous Functionally Graded Shell Panels and Experimental Verifications Prashik Malhari Ramteke, Subrata Kumar Panda Journal of Pressure Vessel Technology Transactions of the ASME, 2023 The present article examines the nonlinear static/dynamic behavior of the functionally graded porous shell panel with variable geometrical shapes exposed to thermomechanical load. The higher-order shear deformation theory (HSDT) is employed to develop a finite element (FE)-based mathematical model. The geometric nonlinearity is incorporated using Green–Lagrange nonlinear strains (GLNS). Voigt's micromechanical model, in association with power-law (GT-I), sigmoid (GT-II) and exponential (GT-III) kinds of material grading patterns, is adopted to calculate the graded panel's effective properties. Also, even (PRT-I) and uneven (PRT-II) distributions of porosity are considered in the present work. The temperature-dependent (TD) properties are adopted in association with variable temperature fields, i.e., uniform (TD-I), linear (TD-II), and nonlinear (TD-III) for the computation of flexural responses. To compute the desired nonlinear responses, the direct iterative technique is utilized. Convergence is used to validate the established model's stability and correctness is further verified by comparing the current numerical data to published and experimental results. The experiment was carried out by fabricating a few natural fiber-reinforced linearly varying layerwise panels for the test run. The study is further extended to investigate the influence of design parameters on nonlinear static and transient data (flexural/stress) of the functionally graded curved/flat panel considering thermal environmental conditions.
Dynamic Analysis of Cracked Functionally Graded Curved Panels with Porosity Variation PM Ramteke, K Maitra, HC Dewangan International Journal of Structural Stability and Dynamics, 2750345 , 2026 2026
Influence of Concentric Cutouts on Axially Compressed Laminated Shell Panel Buckling Behavior HC Dewangan, N Sharma, PM Ramteke, SK Panda International Journal of Applied Mechanics , 2026 2026
Thermomechanical deflection responses of porous functionally graded curved panel structures using higher-order FEM PM Ramteke, HC Dewangan, N Sharma, SV Siruvuri, SK Panda Engineering Computations 43 (1), 43-58 , 2026 2026
Theoretical prediction and experimental verification of thermomechanical deflection responses of geometrically nonlinear porous graded curved structure PM Ramteke, EK Kumar, HC Dewangan, BK Patle, SK Panda International Journal of Mechanics and Materials in Design 21 (1), 17-42 , 2025 2025 Citations: 5
Green waste energy (vibration and wind) hybrid harvester design and analysis using analytical and 3D finite element method PM Ramteke, S Tiwari, EK Kumar, CK Hirwani, SK Panda, SR Mahmoud, ... Journal of Vibration Engineering & Technologies 12 (3), 3005-3019 , 2024 2024 Citations: 6
Nonlinear static and dynamic (deflection/stress) responses of porous functionally graded shell panel and experimental validation PM Ramteke, SK Panda Proceedings of the Institution of Mechanical Engineers, Part C: Journal of … , 2023 2023 Citations: 20
Theoretical thermoelastic frequency prediction of multi (uni/bi) directional graded porous panels and experimental verification PM Ramteke, N Sharma, M Dwivedi, SK Das, CR Uttarwar, SK Panda Structures 54, 618-630 , 2023 2023 Citations: 18
Nonlinear thermomechanical static and dynamic responses of bidirectional porous functionally graded shell panels and experimental verifications PM Ramteke, SK Panda Journal of Pressure Vessel Technology 145 (4), 041301 , 2023 2023 Citations: 22
Computational modelling and experimental challenges of linear and nonlinear analysis of porous graded structure: a comprehensive review PM Ramteke, SK Panda Archives of Computational Methods in Engineering 30 (5), 3437-3452 , 2023 2023 Citations: 40
Nonlinear static and dynamic response prediction of bidirectional doubly-curved porous FG panel and experimental validation PM Ramteke, SK Panda Composites Part A: Applied Science and Manufacturing 166, 107388 , 2023 2023 Citations: 34
Nonlinear Numerical Modelling and Analysis of Porous Functionally Graded Curved Structures under Thermomechanical Loading PM Ramteke 2023
Multidirectional grading influence on static/dynamic deflection and stress responses of porous FG panel structure: a micromechanical approach PM Ramteke, N Sharma, J Choudhary, P Hissaria, SK Panda Engineering with Computers 38 (Suppl 4), 3077-3097 , 2022 2022 Citations: 37
Numerical Investigation of Eigenvalue Characteristics (Vibration and Buckling) of Damaged Porous Bidirectional FG Panels P Hissaria, PM Ramteke, CK Hirwani, SR Mahmoud, EK Kumar, ... Journal of Vibration Engineering & Technologies , 2022 2022 Citations: 36
Static and dynamic deflection characteristics of cracked porous FG panels J Choudhary, BK Patle, PM Ramteke, CK Hirwani, SK Panda, PV Katariya International Journal of Applied Mechanics 14 (07), 2250076 , 2022 2022 Citations: 19
Nonlinear vibration analysis of FGM sandwich structure under thermal loadings B Sahoo, N Sharma, B Sahoo, PM Ramteke, SK Panda, SR Mahmoud Structures 44, 1392-1402 , 2022 2022 Citations: 36
Geometrical nonlinear numerical frequency prediction of porous functionally graded shell panel under thermal environment PM Ramteke, V Kumar, N Sharma, SK Panda International Journal of Non-Linear Mechanics 143, 104041 , 2022 2022 Citations: 54
Nonlinear Vibration Analysis of Multidirectional Porous Functionally Graded Panel Under Thermal Environment PM Ramteke, SK Panda, N Sharma AIAA Journal , 2022 2022 Citations: 36
Nonlinear eigenfrequency prediction of functionally graded porous structure with different grading patterns PM Ramteke, B Patel, SK Panda Waves in Random and Complex Media , 2021 2021 Citations: 34
Nonlinear eigenfrequency characteristics of multi-directional functionally graded porous panels PM Ramteke, SK Panda, B Patel Composite Structures, 114707 , 2021 2021 Citations: 78
Free vibrational behaviour of multi-directional porous functionally graded structures PM Ramteke, SK Panda Arabian Journal for Science and Engineering 46 (8), 7741-7756 , 2021 2021 Citations: 87
MOST CITED SCHOLAR PUBLICATIONS
Free vibrational behaviour of multi-directional porous functionally graded structures PM Ramteke, SK Panda Arabian Journal for Science and Engineering 46 (8), 7741-7756 , 2021 2021 Citations: 87
Effect of grading pattern and porosity on the eigen characteristics of porous functionally graded structure PM Ramteke, SK Panda, N Sharma Steel and Composite Structures 33 (6), 865-874 , 2019 2019 Citations: 83
Nonlinear eigenfrequency characteristics of multi-directional functionally graded porous panels PM Ramteke, SK Panda, B Patel Composite Structures, 114707 , 2021 2021 Citations: 78
Numerical prediction of deflection and stress responses of functionally graded structure for grading patterns (power-law, sigmoid, and exponential) and variable porosity (even … PM Ramteke, K Mehar, N Sharma, SK Panda Scientia Iranica 28 (2), 811-829 , 2021 2021 Citations: 59
Geometrical nonlinear numerical frequency prediction of porous functionally graded shell panel under thermal environment PM Ramteke, V Kumar, N Sharma, SK Panda International Journal of Non-Linear Mechanics 143, 104041 , 2022 2022 Citations: 54
Time-dependent deflection responses of porous FGM structure including pattern and porosity PM Ramteke, B Patel, SK Panda International Journal of Applied Mechanics 12 (09), 2050102 , 2020 2020 Citations: 41
Static deflection simulation study of 2D Functionally graded porous structure PM Ramteke, BP Mahapatra, SK Panda, N Sharma Materials today: proceedings 33, 5544-5547 , 2020 2020 Citations: 41
Computational modelling and experimental challenges of linear and nonlinear analysis of porous graded structure: a comprehensive review PM Ramteke, SK Panda Archives of Computational Methods in Engineering 30 (5), 3437-3452 , 2023 2023 Citations: 40
Multidirectional grading influence on static/dynamic deflection and stress responses of porous FG panel structure: a micromechanical approach PM Ramteke, N Sharma, J Choudhary, P Hissaria, SK Panda Engineering with Computers 38 (Suppl 4), 3077-3097 , 2022 2022 Citations: 37
Numerical Investigation of Eigenvalue Characteristics (Vibration and Buckling) of Damaged Porous Bidirectional FG Panels P Hissaria, PM Ramteke, CK Hirwani, SR Mahmoud, EK Kumar, ... Journal of Vibration Engineering & Technologies , 2022 2022 Citations: 36
Nonlinear vibration analysis of FGM sandwich structure under thermal loadings B Sahoo, N Sharma, B Sahoo, PM Ramteke, SK Panda, SR Mahmoud Structures 44, 1392-1402 , 2022 2022 Citations: 36
Nonlinear Vibration Analysis of Multidirectional Porous Functionally Graded Panel Under Thermal Environment PM Ramteke, SK Panda, N Sharma AIAA Journal , 2022 2022 Citations: 36
Nonlinear static and dynamic response prediction of bidirectional doubly-curved porous FG panel and experimental validation PM Ramteke, SK Panda Composites Part A: Applied Science and Manufacturing 166, 107388 , 2023 2023 Citations: 34
Nonlinear eigenfrequency prediction of functionally graded porous structure with different grading patterns PM Ramteke, B Patel, SK Panda Waves in Random and Complex Media , 2021 2021 Citations: 34
Nonlinear thermomechanical static and dynamic responses of bidirectional porous functionally graded shell panels and experimental verifications PM Ramteke, SK Panda Journal of Pressure Vessel Technology 145 (4), 041301 , 2023 2023 Citations: 22
Nonlinear static and dynamic (deflection/stress) responses of porous functionally graded shell panel and experimental validation PM Ramteke, SK Panda Proceedings of the Institution of Mechanical Engineers, Part C: Journal of … , 2023 2023 Citations: 20
Static and dynamic deflection characteristics of cracked porous FG panels J Choudhary, BK Patle, PM Ramteke, CK Hirwani, SK Panda, PV Katariya International Journal of Applied Mechanics 14 (07), 2250076 , 2022 2022 Citations: 19
Theoretical thermoelastic frequency prediction of multi (uni/bi) directional graded porous panels and experimental verification PM Ramteke, N Sharma, M Dwivedi, SK Das, CR Uttarwar, SK Panda Structures 54, 618-630 , 2023 2023 Citations: 18
Acoustic responses of natural fibre reinforced nanocomposite structure using multiphysics approach and experimental validation RK Satankar, N Sharma, PM Ramteke, SK Panda, SS Mahapatra Advances in nano research 9 (4), 263-276 , 2020 2020 Citations: 10
Dynamic deflection responses of glass/epoxy hybrid composite structure filled with hollow-glass microbeads HC Dewangan, M Thakur, B Patel, PM Ramteke, CK Hirwani, SK Panda The European Physical Journal Plus 136, 722 , 2021 2021 Citations: 9
