Results 251 to 260 of about 1,652 (302)

Geometrically Nonlinear Transient Response of Functionally Graded Shell Panels with Initial Geometric Imperfection

Mechanics of Advanced Materials and Structures, 2013
This article deals with the geometrically nonlinear transient response of functionally graded (FG) shell panels in thermal environments having initial geometric imperfection. The theoretical formulation considers Sanders’ approximation for doubly curved shells and von Karman type nonlinear stresses are incorporated into the first order shear ...
S Pradyumna, Namita Nanda
exaly   +2 more sources

A comparison of geometric imperfection models for collapse analysis of ship-type stiffened plated grillages [PDF]

Engineering Structures, 2022
The assessment of the buckling and ultimate collapse strength is a mandatory step in the ultimate limit state design of ship structures. The collapse analysis of ship-type stiffened panels under longitudinal compression is highly affected by initial ...
Shen Li, Dimitris G Georgiadis, Do Kyun Kim   +2 more
exaly   +2 more sources

Vibration analysis of stiffened plates with initial geometric imperfections

Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment, 2020
This paper presents the vibration analysis of stiffened plates with initial imperfections, using both conventional and super finite element methods. Von Karman theory was utilized so as to formulate the plate element. Eccentricity of the stiffeners is also taken into account and they are not limited to be placed on nodal lines.
Shahed Jafarpour, Mohammad Reza Khedmati
openaire   +1 more source

Measurement of the geometric initial imperfections in diaphragms

Thin-Walled Structures, 1992
Abstract A method, using a new surveying technique, is used for the measurement of the geometric initial imperfections in box girder diaphragms. The method, accurate to ±0·1 mm , may be used on diaphragms contained in a box girder where contact with the surface of the diaphragm is difficult or impossible or inadvisable due to the presence of ...
T.H.G. Megson, G. Hallak
openaire   +1 more source

Buckling Analysis of Long Booms with Initial Geometric Imperfections

45th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics & Materials Conference, 2004
Long, thin-walled booms are basic building elements of ultra-light-weight space inflatable structures. Buckling of long booms is critical to the performance and reliability of such space structures. Due to fabrication and packaging process, long booms of a space inflatable structure may have geometric and material imperfections. These imperfections can
Bingen Yang, M. Lou, H. Fang
openaire   +1 more source

On the Choice of Initial Geometric Imperfections in Externally Pressurized Shells

Journal of Pressure Vessel Technology, 1999
Localized and global, of eigenmode type, initial geometric imperfections were superimposed on perfect torispherical, ellipsoidal, and toroidal shells of circular and elliptical cross section. Reduction of the load-carrying capacity was then calculated numerically for various geometries and the yield point of material which was assumed to be mild steel.
J. Błachut, O. R. Jaiswal
openaire   +1 more source

Effects Of Initial Geometric Imperfections On The Interaction Between Forced And Parametric Vibrations

Journal of Sound and Vibration, 1994
Abstract The influence of initial geometric imperfections on the response of simply supported rectangular plates subjected to periodic in-plane forces is theoretically analyzed in this work. The large deflection plate theory used in the analysis is derived in terms of the stress function F and lateral displacement W .
S. Sassi, G.L. Ostiguy
openaire   +2 more sources

Free vibrations of a certain geometrically nonlinear system with initial imperfection

AIAA Journal, 1990
The equations of motion of a beam are assumed within the framework of the moderately large bending theory. The effects of an initial imperfection and amplitude on the nonlinear vibration frequency and value of axial internal force in a beam are presented.
Lech Tomski, Stanislaw Kukla
openaire   +1 more source

Buckling of thin-walled columns accounting for initial geometrical imperfections

International Journal of Non-Linear Mechanics, 2017
The paper is devoted to the effect of some geometrical imperfections on the critical buckling load of axially compressed thin-walled I-columns. The analytical formulas for the critical torsional and flexural buckling loads accounting for the initial curvature of the column axis or the twist angle respectively are derived.
Czesław Szymczak, Marcin Kujawa
openaire   +1 more source

Nonlinear strain components of general shells with initial geometric imperfections

Applied Mathematics and Mechanics, 1992
On the basis of nonlinear strain component formulations of three-dimensional continuum, this paper has derived the nonlinear strain component formulations of shells with initial geometric imperfections. The derivation is not confined to a special shell, therefore they possess general properties.
Li, Lijuan, Mei, Zhanxin, Wan, Hong, Liu, Feng   +3 more
openaire   +2 more sources