Results 161 to 170 of about 4,593 (200)

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
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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
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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
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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 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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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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Effects of Initial Geometric Imperfection on Stability of Single-Layer Reticulated Shell

Advanced Materials Research, 2011
The stability of reticulated shell is a key issue for single-layer reticulated shell. In the paper, a single-layer arch-supported shell structure was analyzed by finite element software MIDAS. The eigenvalue buckling analysis and the geometric nonlinear overall stability analysis with initial imperfection of the model which carried two different load ...
Fei Hua Zheng, Jin Song Lei, Wen Zhi Yin
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