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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Metal tube configuration reduces the section modulus to that of a thin plate, thus permitting the section to be bent into a coil for stowage in limited space without destructive yielding of the material. It is readily released to serve as a rigid fluid transportation conduit or structural member.
Tungsten fiber-reinforced copper composites have tensile strength, yield strength, and modulus of elasticity proportional to fiber content. The composites form high strength electrical conductors.
Symmetric formulation of linear theory of viscoelastic materials - creep compliance and stressing viscosity, retardation fluidity and relaxation modulus, and basic operators
Time dependent small-strain modulus of styrene- butadiene rubber, noting predictability from selected molecular parameters
Field-polar forces interaction effect on viscoelastic properties of polypropylene oxide, measuring dilatometric, modulus and damping constants
Blood vessel axial wave propagation measurements to determine modulus of elasticity
Asbestos reinforcement of polymeric structures, discussing tensile modulus and strength relationships to chemical nature of polymeric matrix
Pulse method for rapid determination of internal friction and dynamic modulus of materials
Imbedded moire technique for determining strain distributions on internal plane of model simulating pull-out of rigid fiber from low modulus matrix
Adiabatic elastic constants of molybdenum-rich rhenium alloys, studying concentration effects on bulk modulus, Debye temperatures and interatomic forces
Direct chemical bonding effect on flexural strength and flexural modulus of glass fiber reinforced plastics, noting degradation reactions
Stress graphitizing and boron codeposition effect on dynamic mechanical properties of pyrolytic carbon, noting increase in internal friction and dynamic modulus
Internal friction, Young modulus and resistivity measurements for stage I interstitials in electron irradiated tungsten
Preparation of glass fibers with high Young modulus for reinforced plastics
Dopant effect on dislocation mobility in elastically loaded silicon crystal using internal friction and modulus defect measurements
Fiber-metal matrix composites for gas turbine blades, discussing stress rupture strength, modulus of elasticity, fabrication, etc
Thin metal matrix composite rods elastic properties, examining Al-W system by Young and shear modulus measurements
Lightweight composite has high specific strength and stiffness and remains effective under extreme environmental conditions. Use as engineering material is feasible because it has excellent mechanical properties and is easily produced within small tolerances on constituent volume fractions. Main benefit of composite is its improved longitudinal strength and modulus.