SEARCH · Search NASA
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.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Thermal neutron moisture detection system detects entrapped moisture in intercellular areas of bonded honeycomb sandwich structures. A radium/beryllium fast neutron source bombards a specimen. The emitted thermal neutrons from the target nucleus are detected and counted by a boron trifluoride thermal neutron detector.
Heavy-gage bonded honeycomb sandwich is used as a primary load-bearing structural material in large-diameter boosters. Theoretical investigations based on a small deflection theory for prediction of stress fields and buckling loads, and structural testing were made. This structure is a potential weight saver for compression load-critical components.
Turbopump disk life increased by thin, relatively rigid metal backing ring installed to the honeycomb seal. The aerodynamic and friction damping provided by this modification eliminates first-stage disk cracking.
Computer program for near optimum structural designs of ring stiffened honeycomb sandwich nose fairings
Titanium alloy honeycomb with blackened walls as absorber of solar energy
Hypervelocity impact effect on structural honeycomb spacecraft wall configurations, stressing design and wall thickness parameters
Damaged metallic honeycomb panels can be repaired by drilling holes and welding breakaway studs to both facing sheets. Minimal heat required for welding reduces distortion of highly stressed panels. Repairs can be made without the use of doublers and with greater strength when doublers are used.
Program develops instrumentation for nondestructive testing of adhesive-bond strength in honeycomb materials and air coupled inspection methods suitable for large tankage.
Hexagonal and nonhexagonal cell phenolic honeycomb structures as energy dissipating material for spacecraft construction
Fabrication and testing of lightweight honeycomb sandwich structures
Determination of bond strength of adhesive in honeycomb materials and development of air coupled inspection methods suitable for large tankage
Wind tunnel study of open-face honeycomb to reduce temperature of hypersonic aircraft structure
Photographic study on bromine jet boundary shape in coaxial airstream with honeycombs at injection plane
Hypervelocity impact effect on structural honeycomb spacecraft wall configurations, stressing design and wall thickness parameters
Nondestructive tests for determining braze bond quality of open face honeycomb seal rings, using low viscosity liquids with fluorescent additives
Hexagonal and nonhexagonal cell phenolic honeycomb design as energy dissipating material noting processing, composite constituents, cell configuration and usage environment
Lap-shear strengths of Mg-Al alloy bonded with nylon-epoxy adhesive, including anodized coating rolling schedule and honeycomb core fabrication
Cookie cutter device initiates production of identical, double-contoured fiber glass elements used as shock absorbers. Three-bladed edges convert triangular honeycomb elements into hexagonal shapes which are then stamped to desired length by concave and convex dies. Sandpaper smoothing completes the process.