Results 121 to 130 of about 23,202 (223)

Design and optimization of a self-deploying single axis tracking PV array [PDF]

open access: yes
This study was performed in order to design a tracking photovoltaic (PV) array and optimize the design for maximum specific power. The design considerations were minimal deployment time, high reliability, and small stowage volume.
Colozza, Anthony J.
core   +1 more source

Friction and wear behavior of aluminum and composite airplane skins [PDF]

open access: yes
Friction and wear behavior was determined for small skin specimens under abrasive loading conditions typical of those occurring on the underside of a transport airplane during emergency belly landing. A test apparatus consisting of a standard belt sander
Jackson, K. E.
core   +1 more source

Concepts for the development of light-weight composite structures for rotor burst containment [PDF]

open access: yes
A set of hypotheses is established as to what variables might control the design of a weight-efficient protective device. A particular experiment for evaluating the hypotheses and materials was designed. The design and methods for the analysis of results
Holmes, A. G.
core   +1 more source

Effect of Environmental Exposures on the Aramid Fibre Kevlar [PDF]

open access: yes, 2000
The effects of exposure of Kevlar 49 fibres to thermal, ultrasonic and chemical environments have been analysed. Both the tensile strength and the tensile modulus deteriorate with thermal exposures . However, the former is more sensitive than the latter.
Kalyani, Vijayan
core   +1 more source

Attachment system for silica tiles [PDF]

open access: yes, 1982
An improved method for markedly increasing the bond strength between a rigid, porous refractory material and non-rigid substrate by densifying the face of the rigid material opposing the substrate is discussed.
Dotts, R. L., Holt, J. W.
core   +1 more source

Design of internal support structures for an inflatable lunar habitat [PDF]

open access: yes
NASA has a long range goal of constructing a fully equipped, manned lunar outpost on the near side of the moon by the year 2015. The proposed outpost includes an inflatable lunar habitat to support crews during missions longer that 12 months.
Cameron, Elizabeth A.   +2 more
core   +1 more source

Analysis of LDEF micrometeoroid/debris data and damage to composite materials [PDF]

open access: yes
This report presented published LDEF micrometeoroid/debris impact data in a nomogram format useful for estimating the total number of hits that could be expected on a space structure as a function of time in orbit, angular location relative to ram, and ...
Manuelpillai, G., Tennyson, R. C.
core   +1 more source

Design philosophy issues of fiber reinforced polymer reinforced concrete structures

open access: yes, 2002
The conventional design philosophy for reinforced concrete (RC) relies heavily on the ductile properties of steel. These ductile properties are used as a "fuse" and conceal the large uncertainty in the determination of modes of failure caused ...
Guadagnini, M.   +2 more
core  

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