Results 71 to 80 of about 121 (103)
Some of the next articles are maybe not open access.
Une technique nouvelle dans le domaine des fours de réchauffage : le four à longerons décalés
Revue De Metallurgie, 1984Y. Braud, H. Pierrard
exaly +2 more sources
Finite Elements Analysis on the Impact Absorption Behavior of Composite Vehicle Longeron
Advanced Materials Research, 2011In this paper, an experimental model was built in the nonlinear finite element software LS-DYNA. A metal tube wrapped fiberglass epoxy composite outside (called “composite tube” for short) was impacted in its axial direction in the simulation. The key problems about building the model were discussed later.
Gui Fan Zhao +2 more
openaire +1 more source
Stress intensity factors for an arbitrarily oriented crack near a hole in longeron web
Theoretical and Applied Fracture Mechanics, 1999Damage-tolerant design of composite components in aerospace structures requires computationally effective stress and failure analysis methods. This study introduces an analytical/numerical method to determine the stress field and the stress intensity factors in a composite longeron web with an arbitrarily oriented straight crack near a hole. Typical of
B. Sergeev, E. Madenci, D.R. Ambur
openaire +1 more source
Symbolic Equations for the Stiffness and Strength of Straight Longeron Trusses
47th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference<BR> 14th AIAA/ASME/AHS Adaptive Structures Conference<BR> 7th, 2006Abstract : Symbolic equations for the effective continuum stiffness and strength properties of several periodic beam-like trusses have been previously derived and are well documented in the literature. These equations are useful because they allow for rapid design and assessment of structures that would otherwise require a more time-consuming analysis.
openaire +1 more source
F/A-18 Dorsal Longeron EMI Gasket System
CORROSION 1989, 1989Abstract This paper describes the evolution of the electromagnetic interference (EMI) gasket system installed at the dorsal longeron to dorsal cover interface of the F/A-18 fighter aircraft. It describes a corrosion problem which surfaced in 1984 and the design efforts undertaken to solve it.
openaire +1 more source
Composite patch reinforcement of cracked aircraft upper longeron: analysis and specimen simulation
Theoretical and Applied Fracture Mechanics, 1990Abstract The use of composite patches on cracked portions of metallic aircraft structures is an accepted means of improving fatigue life and attaining high structural efficiency. As more and more advanced composite materials are beng developed, the wider use of the repair technology is anticipated even for the reinforcement of primary aircraft ...
C.L. Ong, R.C. Chu, T.C. Ko, S.B. Shen
openaire +1 more source
Use of Longeron Anchored Cables in Multilobed Liquid Booster Tanks
The Journal of the Royal Aeronautical Society, 1965The use of multilobed pressure vessels is not new. Such structures have been used in civil engineering applications for many years. It has been recognised that substantial weight savings are possible by reducing the radius of curvature by lobing. Usually the resulting discontinuity stresses at the junctions of the lobes have been balanced by attaching ...
openaire +1 more source
Advanced simulation and testing of composite TRAC longerons
2020The simulation of deployable composite longerons is not trivial. An appropriate mathematical model should account for large rotations/displacements and an accurate (eventually layer-wise) description of strains and stresses in the far nonlinear regime. In this context, the present work proposes a novel modelling technique for the nonlinear analysis of ...
A. Pagani +3 more
openaire +1 more source
29th Structures, Structural Dynamics and Materials Conference, 1988
The significant design variables of a deployable three longeron truss beam, designed for minimum member loads during deployment, are identified and the sensitivity of the load level in the members of the truss beam due to variations of the design variables is established.
DIRK WARNAAR, JERROLD HOUSNER
openaire +1 more source
The significant design variables of a deployable three longeron truss beam, designed for minimum member loads during deployment, are identified and the sensitivity of the load level in the members of the truss beam due to variations of the design variables is established.
DIRK WARNAAR, JERROLD HOUSNER
openaire +1 more source
Vulnerability diagnosis of the AAC du Longeron watershed. Transposability to other sites?
2016Protection des captages en eaux de surface. Diagnostic de vulnérabilité de l’AAC du barrage du Longeron Transposabilité sur d’autres sites ?
Le Hénaff, G., Buys, C.
openaire +1 more source