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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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Plastic material combined with stainless-steel fibers and molded under heat and pressure into a desired configuration is both soft enough to deform under a load and resilient enough to return to its original shape when the load is removed.
Device generates an acoustic signal whose frequency changes disclose the presence of delaminated or unbonded areas in plastic laminates. A microphone makes the frequency change audible.
Birefringent polycarbonate polymer for use in photoelasto-plastic studies
Stability of small cellulose acetate plastic cylinders subjected to internal pressure and axial compression
Commercially available plastic scintillators are attached to the glass windows of standard photomultiplier tubes for detection of ultraviolet radiation.
Rotating mandrel permits the accurate cutting, forming, and sealing of plastic gores for assembly of an inflatable surface of revolution. The gores remain on the mandrel until the final seam is reached. Tolerances are tightly controlled by the mandrel configuration.
Flexible copper purge and coolant hoses is covered with a high-temperature shrinkable plastic for protection against severe vibration during rocket engine tests. This type of tubing is being used on all flexible water tubes used in F-1 engine tests.
Gasket of a commercially available plastic material is interposed between the mating surfaces in axial joints where a hard and a soft metal are in intimate contact under stress conditions. This eliminates the fretting problem and is quicker and less expensive than the plating process.
Cyclic plastic stresses in notched aluminum alloy sheets under constant-amplitude repeated tension and reversed loading - fatigue life data
Cyclic plastic stresses at notch roots of aluminum alloy sheets under repeated tension and reversed loading
Projectile-impact-induced fracture of liquid filled, filament-reinforced plastic or aluminum tanks
Mechanical and tensile properties of polyethylene films for prototype plastic space erectable structures
Bending analysis of elastic-plastic circular plates under arbitrary axisymmetric loading
Stress wave propagation in elastic-plastic solid with cylindrical or spherical symmetry and expanding core
Cyclic plastic stresses at notch roots in aluminum alloy sheet specimens under constant- amplitude repeated tension and reversed loading
A mix of borax powder and a chlorinated anhydrous polyester resin yields a plastic composition that is fire-retardant, yields a minimum of toxic gases when heated, and exhibits high thermal insulating properties. This composition can be used as a coating or can be converted into laminated or cast shapes.
New class of thermosetting plastics has high hydrocarbon content, high stiffness, thermal stability, humidity resistance, and workability in the precured state. It is designated cyclized polydiene urethane, and is applicable as matrices to prepare chemically stable ablative materials for rocket nose cones of nozzles.
Polarized light applied to drilled laminated plastic components exposes to the human eye the locked-in stresses that will result in fractures and delaminations when the soldering procedure takes place. This technique detects stresses early in the production cycle before appreciable man-hours are invested in an item destined for rejection.