Results 111 to 120 of about 2,165 (141)
Bulletin of Belgorod State Technological University named after. V. G. Shukhov, 2017 Tatyana Duyun +3 more
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Materials Today: Proceedings, 2022
Abstract A substantial amount of parametric analysis and testing is carried out in the design and construction process for a large transport aircraft to achieve an optimal structure. One of the damage tolerance design objectives of any large transport aircraft is a two bay crack arrest in a circumferential direction. In this crack arrest ability, the
Vishwantha J.S. +3 more
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Abstract A substantial amount of parametric analysis and testing is carried out in the design and construction process for a large transport aircraft to achieve an optimal structure. One of the damage tolerance design objectives of any large transport aircraft is a two bay crack arrest in a circumferential direction. In this crack arrest ability, the
Vishwantha J.S. +3 more
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Folding simulation of TRAC longerons via unified one-dimensional finite elements
Materials Research Proceedings, 2023Abstract. This paper proposes a simulation of the folding phase of TRAC deployable booms using refined one-dimensional finite elements in the framework of the Carrera Unified Formulation. The mathematical model involves standard beam finite elements placed along the length of the longeron, and Lagrange polynomials as expansion functions for the cross ...
Augello R. +3 more
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Development of Coilable Longerons Using Elastic Memory Composite Material
43rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2002Elastic Memory Composite (EMC) materials can accommodate very high packaging strains without damage and have significant potential for application to deployable space structures that rely on stored strain energy for deployment. The key difference between EMC materials and traditional carbon-fiber-reinforced composites is a shape memory polymer matrix ...
Mark Lake +3 more
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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
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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
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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
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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.
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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 ...
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