Results 81 to 90 of about 4,593 (200)

A stability of thin shells in view of the initial geometrical imperfections

, 2009
In the report the non-linear deformations and stability of thin shells are considered in view of initial geometrical imperfections. The energy balance low for shell deformation includes usually three components: strain energy depending on viscid and inviscid forces, work of external forces, kinetic energy. At quasistatic loading for
openaire   +2 more sources

Buckling behavior of closed-ribs orthotropic steel decks in long-span suspension bridges

Alexandria Engineering Journal
Recently, routine inspections of existing orthotropic steel decks (OSDs) have revealed numerous instances of local buckling deformations in the U-ribs, which could significantly affect the structural safety of the bridges.
Hesham Abdelbaset, Zhiwen Zhu, Mohmmad A. Pyram   +2 more
doaj   +1 more source

Buckling and Failure of Compression-Loaded Composite Cylindrical Shells With Geometric and Material Imperfections

, 2004
The results of an experimental and numerical study of the effects of initial imperfections on the buckling response and failure of unstiffened thin-walled compression-loaded graphite-epoxy cylindrical shells are presented.
Hilburger, Mark W., Starnes, James H., Jr.   +1 more
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Buckling of a Long, Axially Compressed, Thin Cylindrical Shell With Random Initial Imperfections

, 1972
The effect of random geometric imperfections on the maximum load-carrying capacity of an axially compressed thin cylindrical shell is studied. Following a perturbation approach, equations are derived which relate the first and second-order statistics of ...
T. T. Soong, R. A. Van Slooten
core   +1 more source

Prediction of buckling damage of steel equal angle structural members using hybrid machine learning techniques

Scientific Reports
This article deals with prediction of buckling damage of steel equal angle structural members using a surrogate model combining machine learning and metaheuristic optimization technique.
Nang Xuan Ho, Tien-Thinh Le, The-Hung Dinh, Van-Hai Nguyen   +3 more
doaj   +1 more source

NUMERICAL CHARACTERIZATION OF THE KNOCK-DOWN FACTOR ON UNSTIFFENED CYLINDRICAL SHELLS WITH INITIAL GEOMETRIC IMPERFECTIONS

, 2015
The aim was to validate experimental test results, including imperfection measurements of composite cylinders, with FEM and point out their limitation, advantage and disadvantage against KDF approach.
Arbelo, Mariano, Kalnins, K., Ozolins, Olgerts, Castro, Saullo, Degenhardt, Richard   +4 more
openaire   +2 more sources

Comparison of new Design Guidelines for Composite Cylindrical Shells prone to Buckling

, 2013
Currently, imperfection sensitive shell structures prone to buckling are designed according to the NASA SP-8007 guideline, from 1968, using its conservative lower-bound curve.
Zimmermann, R., Castro, Saullo, Degenhardt, Richard, Arbelo, Mariano   +3 more
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Investigation of Geometric Imperfections of Support Scaffold Systems (No. R895) [PDF]

, 2009
The report describes the findings from various site measurements of geometric imperfections on support scaffold systems, also known as falsework in industry. The measurements consist of out-of-straightness of the standards (uprights), out-of-plumb of the
Rasmussen, Kim J.R., Chandrangsu, Tayakorn   +1 more
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The influence of initial geometric imperfections on the buckling load of single and double curvature concrete shells

, 2012
Several traditional methods are available to address the problem of instability in concrete shells, usually by means of curves representing the influence of the initial geometric imperfections in the buckling load for simple geometries (spheres and ...
Tovar Peñaranda, Juan Pedro, Tomás Espín, Antonio   +1 more
core   +1 more source

Nonlinear flexural vibrations of layered panels with initial imperfections

, 2006
In the presented paper the nonlinear response of doubly curved layered panels subjected to time-varying lateral loads is studied. The considered panels are composed of three thick perfectly bonded isotropic layers, which are symmetrically arranged with ...
Adam, Christoph
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