Geometrical large deformation-dependent numerical dynamic deflection prediction of cutout borne composite structure under thermomechanical loadings and experimental verification

Dewangan, HC and Panda, SK and Mahmoud, SR and Harursampath, D and Mahesh, V and Balubaid, M (2022) Geometrical large deformation-dependent numerical dynamic deflection prediction of cutout borne composite structure under thermomechanical loadings and experimental verification. In: Acta Mechanica, 233 (12). 5465 -5489.

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Abstract

The geometrical nonlinear dynamic deflections of cutout abided laminated plate/shell panels under thermomechanical loading are being analyzed computationally. The curved structure has been formulated mathematically using higher-order displacement variables. The panel geometrical large deformation under the combined thermomechanical loading has been introduced in the current mathematical model via two strain–displacement relationships (Green and von Kármán). The structural governing equation of motion under the transient loading is converted to its weak form and the algebraic equation sets by taking the advent of the nonlinear finite element discretization technique. Finally, a generic computer program has been prepared (in MATLAB) for the nonlinear solution of a cutout-borne composite structure by adjoining two established techniques (Newmark’s constant acceleration integration scheme and the direct iterative technique). The nonlinear dynamic numerical solution consistency is checked by performing a few convergence tests (time-steps and element densities). In addition, repetitive computations have also been performed to verify the current solution’s accuracy level. The numerical solution has also been compared further with the in-house experimental data from the laboratory-scale test rig. Subsequently, the current solution technique has been utilized to solve the cutout-related parameters (size, shape, position, and orientation), geometrical structure input, and loading conditions. The solutions show applicability with and without the composite’s temperature-dependent elastic properties, including the variable nonlinear strain effect.

Item Type:	Journal Article
Publication:	Acta Mechanica
Publisher:	Springer
Additional Information:	The copyright for this article belongs to Springer.
Keywords:	Composite structures; Deformation; Equations of motion; Geometry; Iterative methods; Nonlinear equations; Structure (composition), 'current; Composites structures; Dynamic deflections; Element density; Experimental verification; Larger deformations; Numerical dynamics; Numerical solution; Thermomechanical loading; Time step, MATLAB
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	16 Dec 2022 09:52
Last Modified:	16 Dec 2022 09:52
URI:	https://eprints.iisc.ac.in/id/eprint/78477

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