Results 221 to 230 of about 1,126 (265)

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
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Effects of Initial Geometric Imperfections on Parametric Instability of Rectangular Plates

Volume 6B: 18th Biennial Conference on Mechanical Vibration and Noise, 2001
Abstract The authors present a rational analysis of the effect of initial geometric imperfections on the dynamic behaviour of rectangular plates activated by a parametric excitation. This subject has been extensively investigated theoretically in the past, but no experimental data seems to be complete enough to validate the theory.
Lyne St-Georges, G. L. Ostiguy
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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
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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
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Effects of initial geometric imperfections on dynamic behavior of rectangular plates

Nonlinear Dynamics, 1992
The present work deals with the influence of initial geometric imperfections on the dynamic behavior of simply supported rectangular plates subjected to the action of periodic in-plane forces. The nonlinear large-deflection plate theory used in this analysis corresponds to the dynamic analog of von Karman's theory.
Germain L. Ostiguy, Sadok Sassi
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Structural performance of a gossamer isogrid column with initial geometric imperfections

19th AIAA Applied Aerodynamics Conference, 2001
This paper reports on the experimental study and analysis of a novel gossamer structural component. The component is a 3 m long thin-walled isogrid column prototype which may be elastically stowed and deployed. The static and dynamic mechanical response of the deployed prototype is examined and compared to an idealized model.
Jason Hinkle, Lee Peterson, Peter Warren
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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
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A Parametric Study on Geometrically Nonlinear Analysis of Initially Imperfect Shallow Spherical Shells

Journal of Elastomers & Plastics, 2008
Geometrically nonlinear analysis of initially imperfect shallow spherical shells under uniformly distributed axisymmetrical load is investigated in this computational study. The thickness of the shell is considered to be uniform and the material is assumed to be isotropic.
Yükseler, R. Faruk, Altekin, Murat
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Influence of initial geometric imperfections on vibrations of thin circular cylindrical shells

Computers & Structures, 1983
Abstract The influence of initial geometric imperfections (out-of-roundness) on vibrations of a right circular cylindrical shell is investigated on the basis on non-linear large deformation shell theory. Both free and forced motions (due to base excitation caused by seismic effects) are treated.
Watawala, Lakshman, Nash, William A.
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Study on Buckling of an H-Shaped Steel Member with Initial Geometric Imperfection

Applied Mechanics and Materials, 2012
Based on Ježek method of computing the elastic-plastic buckling of the member under the axial compressive load and the bending moment, considering the initial imperfection, the analytical expressions of calculating the ultimate load of buckling about the neutral axis with the maximum moment of inertia for an H-shaped member are derived.
Peng Niu, Gang Yang, Chun Fu Jin
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