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Nonlinear Analysis of Stiffened Laminated Cylindrical Shells Using the Layerwise Theory of Reddy
The layerwise shell theory of Reddy is used to develop the buckling and the postbuckling equations of circular cylindrical shells reinforced by means of axial and ring stiffeners and subject...

Large Deformation Theory Using Truncated Rotations
Today's aerospace industry has advanced to the point of using optimum design techniques in virtually all applications. In structural elements, orthotropic fiber composite materials have...

A Membrane Structure for a Lunar Assembly Building
This paper describes potential design options and construction approaches for the development of an inflatable membrane structure of non-circular cross section. This structure could be...

Analysis of Inflating Habitable Space Structures with neomass (near-Earth-object mass)
The discovery of near Earth objects (NEOs), during August 1992, and that one of them is a dormant comet, dramatically changed the potential availability of near-Earth resources. NEOs provide...

Inelastic Response of Metal Matrix Composite Tubes
An analytical method which exactly satisfies the equations of the boundary value problem for the inelastic response of laminated metal matrix composite tubes on a point-wise basis is presented....

Mechanics of Curved Fiber Bundles in Composites
Fiber undulations are inherent to manufacturing processes like braiding and filament-winding, and sometimes occur as defects in other composite structures. This paper summarizes the status...

Behavior of Bolted Joints in 3-D Braided Composites
As composites are used more as replacements for metals in space structures, the question arises as to the most efficient way to join the components. Mechanical fasteners are a common joining...

Hygrothermal Effects in Composite Sandwich Panels
The macromechanical analysis of a composite panel with laminate facings and a honeycomb core is carried out by taking into account mechanical and hygrothermal loads. In this analysis the...

Late Stage Damage in G30-500/PMR-15 Laminates
Damage progression has been studied experimentally under tension using [0₂/90₆]_s...

Thermal Cycling of Thin and Thick Ply Composites
An experimental study was conducted to determine the effects of ply thickness in composite laminates on thermally induced cracking and changes in the coefficient of thermal expansion (CTE)....

Development, Testing and Modeling of Ceramic Composites for Lunar Applications
The procedure referred to as thermal liquefaction allows production of Intermediate Ceramic Composites (ICC) from lunar simulants with various admixtures. For their use as structural materials...

Update of the Implications of Recent Space Resource Discovery
Immense resources have been discovered in the space near Earth during the last decade. Last August, 1992, one of the resource objects was discovered to contain a key ingredient that might...

Resource Recovery Facilities for Earth Approaching Comets
Mankind's next large resource location may be off the planet. The facilities required for mining and material processing offer interesting concepts for the development of mankind's first...

Remote Sensing of Astrofuel^TM
A direct, high-resolution measurement from lunar orbit of the location of high concentrations of ³He in the lunar regolith is needed for the initiation...

The Challenge of Mining He-3 on the Lunar Surface: How All the Parts Fit Together
After the initial confirmation of the existence of He-3 on the lunar surface in 1985, there has been a flurry of activity both in the U.S. and abroad to find the best method of garnering...

Helium-3 on the Moon: Model Assumptions and Abundances
Solar-wind particles are present in the outer few 100 angstroms of each soil particle of the Moon. Of particular interest, are the volatiles hydrogen (40-100 ppm) and helium (5-45 ppm)....

In-situ Extraction of Lunar Soil Volatiles
Techniques for their recovery and utilization of the potentially valuable solar-wind elements embedded in the lunar regolith have been proposed. In order to acquire quantities of ³He...

Nuclear Propulsion: Safety Measures and Concerns
Since nuclear fission was discovered, many potential uses for it have been found. One such application of fission is nuclear propulsion systems in space ships; however, the elements resulting...

A Discussion of Nuclear Propulsion in Space Travel
Nuclear thermal propulsion (NTP) is gaining popularity as a safe alternative to conventional propulsion. Such alternatives are desirable to meet the goals of lunar colonization and manned...

A Space Station of Mars
While we are putting stations on the moon and in orbit in this fast changing world of growing scientific knowledge we must look past the step we are currently on to the steps beyond. The...

 

 

 

 

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