The Experts below are selected from a list of 186 Experts worldwide ranked by ideXlab platform

Subrata Kumar Panda - One of the best experts on this subject based on the ideXlab platform.

  • Vibroacoustic analysis of un-baffled layered composite plate under thermal environment
    Materials Today: Proceedings, 2020
    Co-Authors: Shivam Agarwal, Binita Dash, Prakhar Saini, Nitin Sharma, Trupti Ranjan Mahapatra, Subrata Kumar Panda
    Abstract:

    Abstract The current article deals with numerical study on the sound radiation characteristics of layered composite plates in a thermal environment and subjected to harmonic point excitations. The first-order shear deformation theory is used to model the shell panels. The Finite element method (FEM) is used to perform the modal analysis on the plates using ANSYS commercial software package followed by the acoustic analysis performed using boundary element method (BEM) via LMS Virtual.Lab. The critical buckling temperature, natural frequency and the sound power radiated by the vibrating plate is compared with the published data. The impact of elevated temperature load, the Modular Ratio, support conditions, aspect Ratio and on the thermo-acoustic responses of the vibrating layered composite plates is investigated. The thermal environment greatly influences the acoustic radiation responses. The radiation efficiency of the plate is influenced more significantly in thermal environment by the Modular Ratio in the low frequency domain

  • Experimental and numerical investigation of static and free vibRation responses of woven glass/epoxy laminated composite plate:
    Proceedings of the Institution of Mechanical Engineers Part L: Journal of Materials: Design and Applications, 2015
    Co-Authors: Sushree S. Sahoo, Subrata Kumar Panda, Vijay K. Singh
    Abstract:

    In this article, the static and the free vibRation behavior of laminated woven glass/epoxy composite plate have been investigated numerically and validated through subsequent experimentation. The laminated composite shear deformable plate has been modelled mathematically using two different higher-order kinematic theories and the commercial finite element package (ANSYS). The domain has been discretized using the finite element steps and the desired responses (deflections and frequencies) are computed numerically using homemade computer code developed in MATLAB environment. The validity and the convergence behavior of developed models have been established by comparing the responses with those available published literature, simulation and the corresponding experiment. Finally, the effects of geometrical and material parameters (thickness Ratio, Modular Ratio and support conditions) and the necessity of higher-order model for the analysis of laminated structure have been highlighted by solving wide variet...

  • Experimental and simulation study of flexural behaviour of woven Glass/Epoxy laminated composite plate
    IOP Conference Series: Materials Science and Engineering, 2015
    Co-Authors: Sushree S. Sahoo, Vijay K. Singh, Subrata Kumar Panda
    Abstract:

    Flexural behaviour of cross ply laminated woven Glass/Epoxy composite plate has been investigated in this article. Flexural responses are examined by a three point bend test and tensile test carried out on INSTRON 5967 and Universal Testing Machine INSTRON 1195 respectively. The finite element model is developed in ANSYS parametric design language code and discretised using an eight nodded structural shell element. Convergence behaviour of the simulation result has been performed and validated by comparing the results with experimental values. The effects of various parameters such as side-to-thickness Ratio, Modular Ratio on flexural behaviour of woven Glass/Epoxy laminated composite plate are discussed in details.

  • Thermal post-buckling behaviour of laminated composite cylindrical/hyperboloid shallow shell panel using nonlinear finite element method
    Composite Structures, 2009
    Co-Authors: Subrata Kumar Panda, B.n. Singh
    Abstract:

    Abstract Post-buckling strength and the critical buckling load parameter of laminated composite cylindrical/hyperboloid shell panel subjected to uniform temperature field is investigated in this paper. The mathematical model is developed taking into account the full nonlinearity effect in stiffness matrices in Green–Lagrange sense based on the higher order shear deformation theory. Governing equations are derived by minimizing the total potential energy of the system. The panel is represented with the nonlinear finite element model. The system equations are solved by a direct iterative approach to find out the thermal post-buckling equilibrium path. Influence of different parameters such as lamination scheme, Modular Ratio, amplitude Ratio, thickness Ratio, curvature Ratio, aspect Ratio and various support conditions have been examined in details. The results are compared with those available in literature.

  • Non-linear free vibRation analysis of laminated composite cylindrical/hyperboloid shell panels based on higher-order shear deformation theory using non-linear finite-element method
    Proceedings of the Institution of Mechanical Engineers Part G: Journal of Aerospace Engineering, 2008
    Co-Authors: Subrata Kumar Panda, B.n. Singh
    Abstract:

    AbstractIn this article, the non-linear free vibRation analysis of the laminated composite shallow cylindrical/hyperboloid shell panels is attempted by taking geometric non-linearity in Green—Lagrange sense. A higher-order shear deformation theory is employed to model the shell panel flexure. A set of non-linear governing equations is derived using a variational approach. A non-linear finite-element model is proposed and applied to obtain discretized non-linear equations. Typical numerical examples have been solved using a direct iterative technique. Effects of lamination schemes, Modular Ratio, amplitude Ratio, thickness Ratio, and various boundary conditions on the frequency Ratio (non-linear frequency to linear frequency) are examined in detail. The results are compared with those available in the literature. These show the importance and necessity of the Green—Lagrange-type non-linearity especially when the shell panel undergoes large deformation.

Anirban Dhar - One of the best experts on this subject based on the ideXlab platform.

  • Parameter Estimation for a System of Beams Resting on Stone Column-Reinforced Soft Soil
    International Journal of Geomechanics, 2013
    Co-Authors: Anirban Dhar
    Abstract:

    AbstractThe paper pertains to the development of a methodology for the identification of optimal design parameters for a system of beams resting on a stone column–improved soft soil. The simulation optimization–based methodology combines a finite difference–based simulation model and an evolutionary multiobjective optimization model. Two different formulations subjected to stress constraints have been incorporated within the methodology; i.e., (1) minimization of settlement at the center of the beam and minimization of the maximum bending moment and (2) minimization of settlement at the center of the beam and minimization of the maximum shear force. Critical evaluation of an illustrative system shows that stiffness of the stone columns or Modular Ratio and flexural rigidity of the beam are the most important parameters for optimal design. The obtained results also show the potential applicability of the proposed simulation optimization–based methodology.

  • Optimum design of stone column-improved soft soil using multiobjective optimization technique
    Computers and Geotechnics, 2010
    Co-Authors: Anirban Dhar
    Abstract:

    Abstract A combined simulation–optimization-based methodology is proposed to identify the optimal design parameters for granular bed–stone column-improved soft soil. The methodology combines a finite difference-based simulation model and an evolutionary multiobjective optimization model. A combined simulation–optimization methodology is developed for two different formulations: (a) the minimization of maximum settlement and the minimization of differential settlement subject to stress constraints; (b) the minimization of maximum settlement, the minimization of differential settlement and the maximization of the degree of consolidation subject to stress constraints. The developed methodology is applied to an illustrative system. Different scenarios are evaluated to examine critical field conditions. The solution results show that the Modular Ratio and the ultimate stress carrying capacity of the stone column are the most important parameters for optimal design. The obtained results also show the potential applicability of the developed methodology.

Vijay K. Singh - One of the best experts on this subject based on the ideXlab platform.

  • Experimental and numerical investigation of static and free vibRation responses of woven glass/epoxy laminated composite plate:
    Proceedings of the Institution of Mechanical Engineers Part L: Journal of Materials: Design and Applications, 2015
    Co-Authors: Sushree S. Sahoo, Subrata Kumar Panda, Vijay K. Singh
    Abstract:

    In this article, the static and the free vibRation behavior of laminated woven glass/epoxy composite plate have been investigated numerically and validated through subsequent experimentation. The laminated composite shear deformable plate has been modelled mathematically using two different higher-order kinematic theories and the commercial finite element package (ANSYS). The domain has been discretized using the finite element steps and the desired responses (deflections and frequencies) are computed numerically using homemade computer code developed in MATLAB environment. The validity and the convergence behavior of developed models have been established by comparing the responses with those available published literature, simulation and the corresponding experiment. Finally, the effects of geometrical and material parameters (thickness Ratio, Modular Ratio and support conditions) and the necessity of higher-order model for the analysis of laminated structure have been highlighted by solving wide variet...

  • Experimental and simulation study of flexural behaviour of woven Glass/Epoxy laminated composite plate
    IOP Conference Series: Materials Science and Engineering, 2015
    Co-Authors: Sushree S. Sahoo, Vijay K. Singh, Subrata Kumar Panda
    Abstract:

    Flexural behaviour of cross ply laminated woven Glass/Epoxy composite plate has been investigated in this article. Flexural responses are examined by a three point bend test and tensile test carried out on INSTRON 5967 and Universal Testing Machine INSTRON 1195 respectively. The finite element model is developed in ANSYS parametric design language code and discretised using an eight nodded structural shell element. Convergence behaviour of the simulation result has been performed and validated by comparing the results with experimental values. The effects of various parameters such as side-to-thickness Ratio, Modular Ratio on flexural behaviour of woven Glass/Epoxy laminated composite plate are discussed in details.

Sushree S. Sahoo - One of the best experts on this subject based on the ideXlab platform.

  • Experimental and numerical investigation of static and free vibRation responses of woven glass/epoxy laminated composite plate:
    Proceedings of the Institution of Mechanical Engineers Part L: Journal of Materials: Design and Applications, 2015
    Co-Authors: Sushree S. Sahoo, Subrata Kumar Panda, Vijay K. Singh
    Abstract:

    In this article, the static and the free vibRation behavior of laminated woven glass/epoxy composite plate have been investigated numerically and validated through subsequent experimentation. The laminated composite shear deformable plate has been modelled mathematically using two different higher-order kinematic theories and the commercial finite element package (ANSYS). The domain has been discretized using the finite element steps and the desired responses (deflections and frequencies) are computed numerically using homemade computer code developed in MATLAB environment. The validity and the convergence behavior of developed models have been established by comparing the responses with those available published literature, simulation and the corresponding experiment. Finally, the effects of geometrical and material parameters (thickness Ratio, Modular Ratio and support conditions) and the necessity of higher-order model for the analysis of laminated structure have been highlighted by solving wide variet...

  • Experimental and simulation study of flexural behaviour of woven Glass/Epoxy laminated composite plate
    IOP Conference Series: Materials Science and Engineering, 2015
    Co-Authors: Sushree S. Sahoo, Vijay K. Singh, Subrata Kumar Panda
    Abstract:

    Flexural behaviour of cross ply laminated woven Glass/Epoxy composite plate has been investigated in this article. Flexural responses are examined by a three point bend test and tensile test carried out on INSTRON 5967 and Universal Testing Machine INSTRON 1195 respectively. The finite element model is developed in ANSYS parametric design language code and discretised using an eight nodded structural shell element. Convergence behaviour of the simulation result has been performed and validated by comparing the results with experimental values. The effects of various parameters such as side-to-thickness Ratio, Modular Ratio on flexural behaviour of woven Glass/Epoxy laminated composite plate are discussed in details.

T. R. Mahapatra - One of the best experts on this subject based on the ideXlab platform.

  • Nonlinear finite element analysis of laminated composite spherical shell vibRation under uniform thermal loading
    Meccanica, 2014
    Co-Authors: S. K. Panda, T. R. Mahapatra
    Abstract:

    In this article, nonlinear free vibRation behavior of laminated composite shallow shell under uniform temperature load is investigated. The mid-plane kinematics of the laminated shell is evaluated based on higher order shear deformation theory to count the out of plane shear stresses and strains accurately. The nonlinearity in geometry is taken in Green-Lagrange sense due to the thermal load. In addition to that, all the nonlinear higher order terms are taken in the mathematical model to capture the original flexure of laminated panel. A nonlinear finite element model is proposed to discretise the developed model and the governing equations are derived using Hamilton’s principle. The sets of governing equations are solved using a direct iterative method. In order to validate the model, the results are compared with the available published literature and the limitations of the existing models have been discussed. Finally, some numerical experimentation has been done using the developed nonlinear model for different parameters (thickness Ratio, curvature Ratio, Modular Ratio, support condition, lamination scheme, amplitude Ratio and thermal expansion coefficient) and their effects on the responses are discussed in detail.