Static and dynamic analysis of sandwich panel with spatially varying non-Gaussian properties

Mukherjee, S and Sekhar, BR and Gopalakrishnan, S and Ganguli, R (2020) Static and dynamic analysis of sandwich panel with spatially varying non-Gaussian properties. In: Journal of Sandwich Structures and Materials, 22 (8). pp. 2469-2504.

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Abstract

In this work, we study the material and geometric uncertainty effects on the static, free vibration and dynamic behaviour of sandwich beam structures. A higher-order sandwich panel theory is considered for the analysis. The elastic properties of the sandwich beam are considered as 1-D non-Gaussian random field which causes local variation in mass and stiffness matrices of the beam. The discretization of the non-Gaussian random fields is performed using the expansion optimal linear estimation. To perform the numerical analysis, Monte-Carlo simulation along with the computationally efficient time-domain spectral element method is proposed. Numerical results are obtained for different boundary conditions as well as for different materials in the sandwich face sheet and core. Results obtained in this work quantify the effects of material and geometric uncertainty in the response behaviour of a sandwich beam. The individual effect of core thickness and Poisson’s ratio of the core on the static, free vibration and dynamic response is quantified. It is observed that the uncertainties in material and geometric properties along with loading and boundary conditions influence the static, free vibration and dynamic response.

Item Type:	Journal Article
Publication:	Journal of Sandwich Structures and Materials
Publisher:	SAGE Publications Ltd
Additional Information:	The copyright for this article belongs to SAGE Publications Ltd.
Keywords:	Boundary conditions; Composite beams and girders; Dynamic response; Gaussian beams; Gaussian distribution; Gaussian noise (electronic); Geometry; Honeycomb structures; Intelligent systems; Monte Carlo methods; Numerical methods; Sandwich structures; Stiffness matrix, Different boundary condition; Material and geometric properties; Material and geometric uncertainties; Random fields; Sandwich beams; Spectral element; Static and dynamic analysis; uncertainty, Time domain analysis
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	10 Feb 2023 09:22
Last Modified:	10 Feb 2023 09:22
URI:	https://eprints.iisc.ac.in/id/eprint/80175

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