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RISS 인기검색어
- 검색키워드
- 저자 : Dineshkumar Harursampath (검색결과 3 건)
- 무료
- 기관 내 무료
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Vinyas Mahesh,Subhaschandra Kattiman,Dineshkumar Harursampath,Nguyen-Thoi Trung 국제구조공학회 2019 Smart Structures and Systems, An International Jou Vol.24 No.2
The present article addresses the coupled free vibration problem of skew magneto-electro-elastic plates (SMEE) considering the temperature-moisture dependent material properties. The plate kinematics follows Reddy’s higher order shear deformation theory. With the aid of finite element methods, the governing equations of motion are derived considering the Hamilton’s principle and solved by adopting condensation technique. The influence of different temperature and moisture dependent empirical constants on the frequency response of SMEE plate has been assessed. In addition, the natural frequencies corresponding to various fields are evaluated and the effect of empirical constants on these coupled frequencies is determined. A detailed parametric study has been carried out to assess the individual effects of temperature and moisture dependent empirical constants along with their combined effect, aspect ratio, length-to-width ratio, stacking sequence and boundary conditions. The results reveal that the external environment as well as the geometrical skewness has a significant influence on the stiffness of the SMEE plates.
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Detecting width-wise partial delamination in the composite beam using generalized fractal dimension
S. Keshava Kumar,Ranjan Ganguli,Dineshkumar Harursampath 국제구조공학회 2017 Smart Structures and Systems, An International Jou Vol.19 No.1
Generalized fractal dimension is used to detect the presence of partial delamination in a composite laminated beam. The effect of boundary conditions and location of delamination on the fractal dimension curve is studied. Appropriability of higher mode shape data for detection of delamination in the beam is evaluated. It is shown that fractal dimension measure can be used to detect the presence of partial delamination in composite beams. It is found that the torsional mode shape is well suited for delamination detection in beams. First natural frequency of delaminated beam is found to be higher than the healthy beam for certain small and partial width delaminations and some boundary conditions. An explanation towards this counter intuitive phenomenon is provided.
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Arjun Siddharth Mangalasseri,Vinyas Mahesh,Sriram Mukunda,Vishwas Mahesh,Sathiskumar A Ponnusami,Dineshkumar Harursampath,Abdelouahed Tounsi Techno-Press 2023 Advances in nano research Vol.14 No.1
This article investigates the energy harvesting characteristics of a magneto-electro-elastic (MEE) cantilever beam reinforced with carbon nanotubes (CNT) under transverse vibration. To this end, the well-known lumped parameter model is used to represent the coupled multiphysics problem mathematically. The proposed system consists of the MEE-CNT layer on top and an inactive substrate layer at the bottom. The substrate is considered to be made of either an isotropic or composite material. Basic laws such as Gauss's Law, Newton's Law and Faraday's Law are used to arrive at the governing equations. Surface electrodes across the beam are used to harvest the electric potential produced, together with a wound coil, for the generated magnetic potential. The influence of various distributions of the CNT and its volume fraction, substrate material, length-to-thickness ratio, and thickness ratio of substrate to MEE layer on the energy harvesting behaviour is thoroughly discussed. Further, the effect of external resistances and changes in substrate material on the response is analysed and reported. The article aims to explore smart material-based energy harvesting systems, focusing on their behaviour when reinforced with carbon nanotubes. The results of this study may lead to an improved understanding of the design and analysis of CNT-based smart structures.
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