Results 271 to 280 of about 89,296 (306)

Elastic Behavior of Box Beams

Journal of the Aeronautical Sciences, 1937
] \ / f ANY studies have been made of the elastic be^-*havior of the structure of airplane wings and a number of theories have been advanced as a result of these studies. In general, however, it may be said that too little attention has been directed in these studies to the properties of the shear webs and their relative importance in defining the ...
openaire   +1 more source

LONGITUDINAL CRACK IN PRESTRESSED BOX BEAM

PCI Journal, 1969
A WIDE AND DEEP LONGITUDINAL CRACK DEVELOPED IN THE BOTTOM OF A BRIDGE BOX BEAM AND EXTENDED FROM ONE SUPPORT ALMOST TO MID-SPAN. A DETERMINATION OF THE MOST PROBABLE CAUSE OF THE CRACK AND AN EVALUATION OF THE ULTIMATE AND RESERVE STRENGTH OF THE BEAM BY LOAD TESTING TO FAILURE WERE MADE.
Edward G. Nawy, Herbert Goodkind
openaire   +1 more source

Diaphragms for Curved Box Beam Bridges

Journal of the Structural Division, 1975
A finite difference procedure is used to determine the response of a single span curved single box beam bridge with any number of interior diaphragms. The bending and torsional distortions as well as cross-sectional distortions can then be determined throughout the curved box girder. The forces that are determined include bending moment and shear, pure
James C. Oleinik, Conrad P. Heins
openaire   +1 more source

Aeroelastic tailoring of composite box beams

35th Aerospace Sciences Meeting and Exhibit, 1997
Aeroelastic instabilities are an important factor in the design of modern high-speed, flexible aircraft. The current trend is toward the creative use of composites to delay these instabilities. To obtain an optimum design, an accurate as well as efficient model is required.
Mayuresh Patil, Mayuresh Patil
openaire   +1 more source

Formulation and Evaluation of an Analytical Model for Composite Box‐Beams

Journal of the American Helicopter Society, 1990
A direct method for determining the effective elastic stiffnesses and deformation behavior of composite box-beam (BB) structures is developed analytically, validated, and demonstrated. The BB walls are modeled as orthotropic-ply laminated plates, so that the elastic properties vary both through the thickness and around the BB contour; deformation is ...
EDWARD SMITH, INDERJIT CHOPRA
openaire   +1 more source

Box-Beam Active Rotor Blades

2015
The previous chapter clearly showed that shear-based piezoceramic actuation using \(d_{15}\) is feasible for obtaining active twist. The current chapter dwells more on the development and validation of the concept of induced-shear-based piezoceramic actuation in helicopter rotor blades considering a simple two-cell box cross section.
Ranjan Ganguli, Dipali Thakkar, Sathyamangalam Ramanarayanan Viswamurthy   +2 more
openaire   +1 more source

Box beam shear stresses and deflections

1989
The simple beam with loading in one plane was considered in Chapter 4. This type of beam has many applications, such as floor beams for buildings and bridges. However, there are many applications such as airplane wings and fuselages where the beam must take bending in two directions as well as torsional moments. This type of beam which can take all six
openaire   +1 more source

Some Theoretical Considerations on Box Beams

The Journal of the Royal Aeronautical Society, 1941
SummaryBox beams, built up essentially with flanges and webs are widely used in aircraft construction and much has been written about their calculation. But often assumptions are implicitly made without reason. The first aim of this paper is to point out which assumptions must be chosen and why, and to show what results may be expected from them.
openaire   +1 more source

Tests on reinforced plywood box beams

Building Research and Practice, 1973
Traditional plywood box beams depend to a considerable extent on the strength of natural timber for their flanges, and for reasons of safety only the highest grade of timber should normally be used, particularly when it is not laminated or when there is an abrupt change of direction at midspan.
openaire   +1 more source

Joint Structures of Box Beams

2023
Yoon Young Kim, Gang-Won Jang, Soomin Choi   +2 more
openaire   +1 more source