Peripheral Deformation and Buckling of Stainless Steel Hemispherical Shells Compressed by a Flat Plate

Yang, Haisheng; Hu, Junru; Xu, Liang; Lu, Guifang

doi:10.1590/1679-78252434

Cited by 9 publications

(2 citation statements)

References 15 publications

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“…As a typical thin curved shell, spherical shells have been widely investigated in terms of their dynamic responses. In 1972, Updike et al performed a series of experiments on the dynamic response of a semi-spherical shell under axial compression and drop weight impact loads [7][8][9][10][11][12][13]. The deformation mode and energy absorption properties were obtained.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Deformation and Perforation of Ellipsoidal Thin Shell Impacted by Flat-Nose Projectile

Liu

2022

Materials

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Experimental and theoretical studies were carried out on the dynamic deformation and penetration response characteristics of metal ellipsoidal thin curved shells under impact loads. The deformation characteristics of the impacted ellipsoid shell was investigated via the use of a light gas gun to carry out impact loading experiments at different speeds. Ten cases of experiments were conducted with the impact velocities distributed between 25.69 m/s and 118.97 m/s. Stereo digital image correlation (3D-DIC) technology was applied to capture the dynamic deformation and penetration process of the impacted shell. The recovered shells were measured, and the deformation characteristics were analyzed, along with the dynamic evolution, as observed through 3D-DIC analysis. Based on the experimental results, the displacement mode was summarized and the displacement distribution of the locally impacted ellipsoid shell was proposed. The governing equations were derived for the dynamic deformation and penetration of the impacted ellipsoid shell by means of the Lagrange equation. The proposed theoretical model was verified based on the experimental results. Finally, the influence of the curvature distribution on the impact resistance of ellipsoidal shells is discussed. The results indicated that the proposed theoretical model was effective in analyzing the large deformation and the penetration speed. Stretching the axial length of the ellipsoid shell in the impact direction improved its resistance to penetration. Stretching the axial length of the ellipsoid shell perpendicular to the impact direction improved its resistance to deformation, but reduced its resistance to penetration. Maintaining the triaxial ratio and appropriately reducing the size of the ellipsoidal shell improved its resistance to both deformation and penetration. The above research provides a reference for the analysis of the impact resistance of thin-walled curved shell structures in engineering.

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Section: Introductionmentioning

confidence: 99%

Dynamic Deformation and Perforation of Ellipsoidal Thin Shell Impacted by Flat-Nose Projectile

Liu

2022

Materials

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“…The study of Longqiu Li etal [10] provides a pointer in using FE model to derive useful information on onset of plastic yielding but is limited to the treatment of hemi-spherical shells. Other recent studies on deformation behavior of hemispherical shells are captured in references [11] and [12]. In the context of ellipsoidal shells of revolution, majority of published articles focused on either free vibration or buckling behavior.…”

Section: Introductionmentioning

confidence: 99%

Elastic Critical Load Characterization of Ellipsoidal Shells of Revolution: Design Study and Generalized Shell Parameters

Sravanthi¹

2018

IJRASET

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Shells are used for multiple load bearing applications due to their attractive property of high stiffness to weight ratio. Various studies were reported in literature on buckling, free vibration and elastic-plastic transition of hemispherical shells. Few studies dealt with ellipsoidal shells subjected to internal/external pressure. In this paper, we study the elastic critical load characteristics of ellipsoidal shells of revolution subject to compression, targeting a load sensing application. A validated finite element model is built to perform a careful unified study of multiple design configurations and new generalised shell parameters are proposed which represent both hemispherical and elliptical configurations. This helps the designers explore a larger design space in a unified framework and arrive at an optimum configuration. Keywords: Shells, Elastic critical load, Ellipsoidal shells of revolution, Finite Element Analysis I. INTRODUCTION Shells subjected to rigid plate compression have been studied extensively in the literature. Many of the studies analysed the hemispherical cross-section subjected to loads in both elastic and plastic regimes. Over the years, methods of varying fidelity have been used to detail the load-deformation behaviour of these shells under compression. In particular, buckling characteristics were reported for different thickness ratios, height ratios and material properties. A brief overview of the prior literature is detailed below along with motivation for the present study. With regards to hemispherical shells, Reissner[1] investigated the shell-plate contact problem and provided expressions for direct and bending stresses for shallow shells with h/R < 4. Naghdi[2] later extended Reissner's study to include the effect of shear strains. Kalnins[3] devised a multi-segment method for nonlinear analysis of elastic shells. Updike etal[4] investigated the load behavior of an compressed elastic shell, coming up with an analytical formulation for elastic load-deflection and also buckling phenomena wherein the shell deforms with an axisymmetric dimple at the center. Subsequent studies by Shwarz[5] and Kitching[6] focused on load-interference behavior as a function of shell thickness and radius. Interestingly, they were looking at contrasting shell applications, one concerning cornea and other collision of vehicles. Gupta etal [7] focused on buckling of hemispherical shells across a range of thickness ratios (R/t : 15 to 240) and showed good agreement between experimental and theoretical results. Another interesting shell load application to ping pong ball was studied by Pauchard etal[8]. Shariati etal[9] performed experimental and numerical study of buckling behavior of steel shells with flat tops under various loadings. The study of Longqiu Li etal[10] provides a pointer in using FE model to derive useful information on onset of plastic yielding but is limited to the treatment of hemi-spherical shells. Other recent studies on deformation behavior of hemispherical shells are c...

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Integral Forming Manufacture of Weft-Knitted 3D Hernia Repair Mesh

Huang

Tong

et al. 2023

Fibers Polym

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Peripheral Deformation and Buckling of Stainless Steel Hemispherical Shells Compressed by a Flat Plate

Cited by 9 publications

References 15 publications

Dynamic Deformation and Perforation of Ellipsoidal Thin Shell Impacted by Flat-Nose Projectile

Dynamic Deformation and Perforation of Ellipsoidal Thin Shell Impacted by Flat-Nose Projectile

Elastic Critical Load Characterization of Ellipsoidal Shells of Revolution: Design Study and Generalized Shell Parameters

Integral Forming Manufacture of Weft-Knitted 3D Hernia Repair Mesh

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