Faculty Publications

Permanent URI for this communityhttps://idr.nitk.ac.in/handle/123456789/18736

Publications by NITK Faculty

Browse

Author: search.filters.author.Mailan Chinnapandi, M.C.L.

Search Results

Now showing 1 - 4 of 4
  • No Thumbnail Available
    Item
    Effect of Core Topology on Vibro-acoustic Characteristics of Truss Core Sandwich Panels
    (Elsevier Ltd, 2016) Arunkumar, M.P.; Jeyaraj, P.; Gangadharan, K.V.; Mailan Chinnapandi, M.C.L.
    This paper presents numerical simulation studies on effect of core topology on vibro-acoustic behaviour of truss core sandwich panels with metal facings. Free and forced vibration responses of the panels are obtained using finite element method based on the equivalent 2-dimensional models. Sound radiation characteristics of the panel are obtained using Rayleigh integral. It is found that influence of nature of core topology on sound radiation is significant in lower frequencies. It is observed that compared to trapezoidal and rectangular core, triangular core is more suitable for low frequency application and also it radiates less sound compare to trapezoidal and rectangular core. © 2016 The Authors.
  • No Thumbnail Available
    Item
    Sound radiation and transmission loss characteristics of a honeycomb sandwich panel with composite facings: Effect of inherent material damping
    (Academic Press, 2016) Arunkumar, M.P.; Jagadeesh, M.; Jeyaraj, J.; Gangadharan, K.V.; Mailan Chinnapandi, M.C.L.
    This paper presents the results of numerical studies carried out on vibro-acoustic and sound transmission loss behaviour of aluminium honeycomb core sandwich panel with fibre reinforced plastic (FRP) facings. Layered structural shell element with equivalent orthotropic elastic properties of core and orthotropic properties of FRP facing layer is used to predict the free and forced vibration characteristics. Followed by this, acoustic response and transmission loss characteristics are obtained using Rayleigh integral. Vibration and acoustic characteristics of FRP sandwich panels are compared with aluminium sandwich panels. The result reveals that FRP panel has better vibro-acoustic and transmission loss characteristics due to high stiffness and inherent material damping associated with them. Resonant amplitudes of the response are fully controlled by modal damping factors calculated based on modal strain energy. It is also demonstrated that FRP panel can be used to replace the aluminium panel without losing acoustic comfort with nearly 40 percent weight reduction. © 2016 Elsevier Ltd
  • No Thumbnail Available
    Item
    Vibro-acoustics of functionally graded porous beams subjected to thermo-mechanical loads
    (Techno-Press, 2022) Mailan Chinnapandi, M.C.L.; Jeyaraj, J.; Eltaher, M.A.
    This manuscript work presents a comprehensive continuum model capable to investigate the effect of porosity on vibro-acoustic behaviour of functionally graded (FG) beams resting on an elastic foundation subjected to thermal and mechanical loadings. Effects of uniform temperature rise and edge compressive load on the sound radiation characteristics are studied in a comparative manner. The numerical analysis is carried out by combining finite element method with Rayleigh’s integral. Detailed parametric studies are accomplished, and influences of power law index, porosity volume, porosity distribution and boundary conditions on the vibro-acoustic response characteristics are analyzed. It is found that the vibroacoustic response under mechanical edge compression is entirely different compared to from that under the thermal load. Furthermore, nature of grading of porosity affects the sound radiation behaviour for both the loads. The proposed model can be used to obtain the suppression performance of vibration and noise FG porous beams under thermal and mechanical loads. © © 2022 Techno-Press, Ltd.
  • No Thumbnail Available
    Item
    Numerical Analysis on Vibro-Acoustic Behavior of Honeycomb Core Sandwich Structure with FG-CNT-Reinforced Polymer Composite Facings
    (Institute for Ionics, 2022) Bhagat, V.S.; George, N.; Arunkumar, M.P.; Jeyaraj, J.; Mailan Chinnapandi, M.C.L.
    Numerical studies carried out on the vibro-acoustic characteristics of an aluminum honeycomb core sandwich structure with functionally graded carbon nanotube polymer composite facings are presented. The layer-by-layer technique is used to model the structure by finding the equivalent elastic properties. From the vibration response, the acoustic characteristic of the honeycomb structure is found by using kinematic continuity between structural velocity and particle velocity at the surface. Forced vibration response of a hexagonal honeycomb sandwich structure is calculated experimentally, and results are compared with the proposed numerical method. Further, the result reveals that the FG-VΛ structure has better vibro-acoustic characteristics rather than FG-XX which gives better acoustic properties when it is considered as a plate without sandwich construction. © 2021, Shiraz University.