Thermo-mechanical large deformation characteristics of cutout borne multilayered curved structure: Numerical prediction and experimental validation

Dewangan, HC and Panda, SK and Sharma, N and Mahmoud, SR and Harursampath, D and Mahesh, V (2023) Thermo-mechanical large deformation characteristics of cutout borne multilayered curved structure: Numerical prediction and experimental validation. In: International Journal of Non-Linear Mechanics, 150 .

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Abstract

The numerical modeling of static large-deformation behavior of the multilayered flat/curved panels with cutouts subjected to thermo-mechanical load is presented in this work. The numerical model includes third-order displacement polynomials. The large-deformation characteristic of the multilayered panel is incorporated using two nonlinear strains (Green–Lagrange and von-Karman). The governing equation is formulated using Hamilton's principle, and approximate numerical solutions are obtained using the selective integration scheme (Gauss-Quadrature) associated with Picard's direct iterative method. A generic computational algorithm is developed in MATLAB using isoparametric finite element (FE) steps. The solution accuracy is verified with the published results and experimental data by utilizing the available/fabricated lab-scale test rig. The role of cutout parameters, including the various geometrical parameters on the nonlinear structural responses, is studied for a clear insight into the damaged structural modeling using the temperature-dependent elastic properties of the laminate. In addition, the effect of nonlinear strain terms on the final structural responses is presented. Based on the observation, the applicability of the full geometrical (Green–Lagrange) strain–displacement relation is established.

Item Type:	Journal Article
Publication:	International Journal of Non-Linear Mechanics
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to Elsevier Ltd.
Keywords:	Finite element method; Geometry; Iterative methods; Lagrange multipliers; Numerical methods; Strain, Cutout; Deformation behavior; Deformation Characteristics; Finite element analyse; Large-deformation behavior; Larger deformations; Multi-layered; Multilayered panels; Nonlinear strain; Thermo mechanical loads, Numerical models
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	31 Jan 2023 06:54
Last Modified:	31 Jan 2023 06:54
URI:	https://eprints.iisc.ac.in/id/eprint/79608

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