Dynamics of Reinforced Composite Panel With Mono-Layer Combined Stacking With Inner Damages at Non-Stationary Impacts

Medvedskii, A. L.; Medvedskiy, Aleksandr L.; Martirosov, V. E.; Martirosov, Mihail; Khomchenko, Anton V.; Homchenko, Anton

doi:10.30987/article_5d2d9231dd5853.89951988

Bulletin of Bryansk State Technical University

2019

DOI: 10.30987/article_5d2d9231dd5853.89951988

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Dynamics of Reinforced Composite Panel With Mono-Layer Combined Stacking With Inner Damages at Non-Stationary Impacts

A. L. Medvedskii¹,

Aleksandr L. Medvedskiy

V. E. Martirosov³

et al.

Abstract: The paper reports the consideration of the behavior and destruction of a reinforced multi-layer flat cylindrical panel made of polymeric composite based on carbon fiber and epoxy binder under the influence of non-stationary loads. There are defined areas of stresses, deflections and indices of destruction for different time periods. To solve the problem there was used a finite element method based on LS-DYNA software complex. The influence of location and dimensions of inner damages under the act… Show more

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Buckling of Steel Conical Panels Reinforced with Stiffeners

Semenov,

Kondratieva,

Glukhikh

2023

Struct. Mech. of Eng. Const. and Build

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Conical shells and their panels are important elements of building structures, but have not been studied sufficiently. This paper explores buckling of truncated steel conical panels reinforced with an orthogonal grid of stiffener plates. The panels are simply supported and are subjected to external uniformly distributed transverse load acting normal to the surface. A geometrically nonlinear mathematical model that takes into account lateral shearing is used. Two options of describing the effect of stiffener plates are considered: the refined discrete method and the method of structural anisotropy (the stiffness of the plates is “smeared”). The computational algorithm is based on the Ritz method and the method of continuing the solution using the best parameter. The algorithm is implemented using Maple analytical computing software. The values of critical buckling loads were obtained for two cases of conical panels with different stiffener options. The load-deflection curves are presented. The convergence of the methods for describing the effect of stiffeners with the increase in their number is discussed. It was found that for conical panels, when choosing a small number of unknown coefficients in the approximation, the value of the critical load may be “overshot”, and it is necessary to select a larger number of unknowns compared to cylindrical panels or flat shells of double curvature.

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Buckling of Steel Conical Panels Reinforced with Stiffeners

Semenov,

Kondratieva,

Glukhikh

2023

Struct. Mech. of Eng. Const. and Build

View full text Add to dashboard Cite

show abstract

Impact of Interlaminar Elliptical Defects Upon Behavior of Rectangular Carbon Plastic Plate at Static and Dynamic Loads

Medvedskiy

Martirosov

Homchenko³

et al. 2020

Bulletin of Bryansk State Technical University

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The purpose of this work is to investigate the impact of the inner defects of elliptical stratification type upon behavior of the rectangular carbon plastic plate at the impact of static and dynamic loads. The investigation methods: the problem is solved in a numerical way with the aid of a finite ele-ment method (FEM) in the LS-DYNA software com-plex (Livermore Software Technology Corp.). The investigation results: the distribution of stresses in plate layers under the impact of static and dynamic loads is obtained. The distribution of destruc-tion indices with the use of different destruction criteria for unidirectional composites (on the basis of carbon band) is defined. Conclusions: the impact of defects of the type of specified shape stratification, dimensions, amount and places of location with regard to the plate under consideration under the action of compressive static load does not practically tell. Under the action of the compressive dynamic load there is observed a noticeable impact of inner defects upon rectangular plate behavior.

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Dynamics of Reinforced Composite Panel With Mono-Layer Combined Stacking With Inner Damages at Non-Stationary Impacts

Cited by 2 publications

References 3 publications

Buckling of Steel Conical Panels Reinforced with Stiffeners

Buckling of Steel Conical Panels Reinforced with Stiffeners

Impact of Interlaminar Elliptical Defects Upon Behavior of Rectangular Carbon Plastic Plate at Static and Dynamic Loads

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