Article
Mechanics
Le Thi Nhu Trang, Hoang Van Tung
Summary: This article analyzes the postbuckling behavior of carbon nanotube reinforced composite panels under uniform temperature rise, which is of considerable importance in engineering practice, especially in aerospace structures. The study reveals that curvature of panel, tangential constraints of edges, and initial geometrical imperfection can lead to changes in the buckling response. Numerical analyses also indicate different influences on the postbuckling behavior of thermally loaded nanocomposite panels.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Materials Science, Composites
Vu Hoai Nam, Cao Van Doan, Nguyen Thi Phuong
Summary: This paper investigates the nonlinear buckling responses of three types of shallow imperfect panels made from functionally graded graphene reinforced composite (FG-GRC) on nonlinear elastic foundations. The nonlinear governing equations are formulated using Reddy's higher-order shear deformation shell theory, and a new approximation technique is developed to determine the stress function. The results provide explicit formulations to calculate the critical buckling loads and postbuckling load-deflection curves, which can be applied to many engineering designs.
POLYMER COMPOSITES
(2023)
Article
Mechanics
Vu Thanh Long, Hoang Van Tung
Summary: This paper analyzes the effects of porosities, tangential constraints of boundary edges, and elevated temperature on the buckling and postbuckling behaviors of thin functionally graded cylindrical shells subjected to uniform torsion. The results show that porosities have a deteriorative effect on the torsional resistance and postbuckling load capacities, while tangential edge constraints have different effects on the postbuckling strength at different temperatures.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Mechanics
Hadi Babaei
Summary: This research analyzes the snap-buckling phenomenon in an infinitely long nanocomposite cylindrical panel subjected to uniformly distributed transverse pressure loading. The results reveal that the snap-buckling phenomenon occurs due to the immovability of the shell's edges when it is subjected to pressure.
COMPOSITE STRUCTURES
(2022)
Review
Chemistry, Multidisciplinary
Hartmut Pasternak, Zheng Li, Algirdas Juozapaitis, Alfonsas Daniunas
Summary: This paper briefly reviews the development of shell stability theory, presents an overview of the current status and trends of stability research on the stiffened cylindrical shell widely used in real engineering, and finally discusses the difficulties and directions of future stability research on cylindrical shell structures in engineering applications.
APPLIED SCIENCES-BASEL
(2022)
Article
Mechanics
Gaojian Lin, Fei Li, Qiuting Zhang, Pengwan Chen, Weifu Sun, Ivan Saikov, Vladimir Shcherbakov, Mikhail Alymov
Summary: This study investigated the dynamic stability of cylindrical fiber composite shells with metal liner subjected to uniform internal pressure pulse, revealing the pulse buckling of the inner metal liner and vibrational buckling of the outer fiber composite shell. Numerical simulations showed the effect of buckling amplitude of the inner metal liner on the dynamic stability of the outer fiber composite shell.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Civil
Oezer Zeybek, Cem Topkaya
Summary: This study investigates the stiffness requirements for wind girders in open top cylindrical steel tanks. A parametric study using finite element analysis is conducted to explore the relationship between buckling strength and the second moment of area of the wind girder, and a new second moment of area requirement is proposed. Additionally, geometrically nonlinear analysis including imperfections is used to develop a buckling strength curve that takes imperfection amplitudes into account for design.
THIN-WALLED STRUCTURES
(2022)
Article
Mechanics
Yosef Dayan, David Durban, Sefi Givli
Summary: This study provides an in-depth investigation of the postbuckling behavior of an elastic fiber constrained inside a rigid cylinder, focusing on the fiber deformation and contact stages during initial postcontact. It also examines the effect of fiber geometrical imperfection and provides new understanding of the influence of key parameters on the behavior of such systems.
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
(2022)
Article
Engineering, Marine
Vu Thanh Long, Hoang Van Tung
Summary: This study investigates the buckling and postbuckling behavior of nearly cylindrical shells made of functionally graded porous material under external lateral pressure in thermal environments. Analytical solutions are derived to assess the effects of various factors on the critical loads and postbuckling strength of the shells.
SHIPS AND OFFSHORE STRUCTURES
(2023)
Article
Multidisciplinary Sciences
Abubakr E. S. Musa, Madyan A. Al-Shugaa, Husain J. Al-Gahtani
Summary: Buckling is the most common type of failure for circular cylindrical shells subjected to axial compressive forces. The buckling stress of these shells is highly affected by geometric imperfections, such as localized damage (dents), which significantly reduce the buckling strength. This study numerically investigates the effect of dent imperfections on the buckling strength of shells with large R/t ratios, finding that dent size, depth, and position do not show a remarkable trend in their relationship with the reduction in buckling strength.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Marine
Gui-Jie Shi, Yu-fei Xiong, Shi-Jian Cai, De-Yu Wang
Summary: In this paper, stiffened panels are subjected to a series of impact experiments to study their dynamic buckling behavior. The high-speed deflection fields during the impact process are recorded using a 3D-DIC system, providing dynamic deflection data for analysis. Based on the experiment results, the application of dynamic buckling criteria is studied to determine the critical impact velocity for the experiment models. Finally, finite element simulation is used to compare with the experiment results and the influence of initial imperfection modes is discussed.
Article
Mathematics, Applied
Davit Harutyunyan, Andre Martins Rodrigues
Summary: This study proves that the buckling load of cylindrical shells under vertical compression depends on the curvature of the cross section curve. For convex curves with uniformly positive curvature, the buckling load has a linear relationship with the shell thickness. For curves with positive curvature at finitely many points, the buckling load lies between C(1)h(8/5) and C(2)h(3/2) for small thickness h > 0.
JOURNAL OF NONLINEAR SCIENCE
(2023)
Article
Materials Science, Composites
Pham Thanh Hieu, Hoang Van Tung
Summary: The buckling and postbuckling behavior of thin composite cylindrical shells reinforced by CNTs under uniform temperature rise were investigated in this article. The study found that volume fraction, distribution type of CNTs, geometrical parameters, degree of tangential edge constraint, buckling mode, and surrounding elastic media all have effects on the buckling temperatures and postbuckling strength.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2021)
Article
Mechanics
Zbigniew Kolakowski, Andrzej Teter
Summary: The behavior of FGM cylindrical shells with imperfections under compression was analyzed using an analytical-numerical method. The critical load and imperfection sensitivity surface of real structures were determined. The material gradient and support conditions of the shell were taken into account in the calculations. This research provides insights for the design and verification of shell structures.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Mechanical
Alireza Moazezi Mehretehran, Shervin Maleki
Summary: This paper thoroughly investigates the effects of internal pressure on axial buckling of steel silos using non-linear Finite Element analyses, and thoroughly examines the Eurocode provisions on this issue.
ENGINEERING FAILURE ANALYSIS
(2022)
