Engineering topics
Publications and source records attributed to Johnson, R. L..
Paraffinic resins, in high temperature applications, improve strength of thin lubricant film in Hertzian contacts even though they do not increase bulk oil viscosity. Use of resin circumvents corrosivity and high volatility problems inherent with many chemical additives.
Friction wear of human hip joint prostheses made from cobalt molybdenum and cobalt molybdenum chromium alloys
Two types of polyimide seals are developed for hydraulic actuator rod in low pressure second stage of two-stage configuration. Each seal melts test objectives of twenty million cycles of operation at 534 K. Analytical and experimental study results are discussed. Potential applications are given.
Sliding friction and wear tests of polyimide, pyrrone, and poly/amide-imide/ resin seals on steel rotating disks at 260 C in dry air for hydraulic actuator boundary lubrication
Bearings, lubricants, and seals for lubricated and hydraulic components for space shuttle with high temperature and vacuum operating capabilities
Design of shaft face seal with self-acting lift augmentation for gas turbine engines
Aircraft parts lubrication friction and wear problems, discussing failure modes, solid and liquid lubricants, component damage and lubrication systems
Compressible flow across shaft face seals and narrow slots, examining fluid inertia, viscous friction and entrance losses
Investigating wear processes in hip prostheses after brief use
Analysis of compressible flow across shaft face seals
Lubrication by boundary, elastohydrodynamic, and fluid films, wear due to fretting, erosion, scuffing, and pitting, and friction in aircraft
Human orthostatic tolerance measurement via leg and lower body negative pressure, discussing heart rate and stroke volume variations
Sealing dam analysis for design of shaft face seal with self-acting lift augmentation for advanced gas turbine engines
Real time contourogram for monitoring ECG waveform data, describing cardiac measurement and data display
Filled polytrifluorochloroethylene /PTFCE/ shows better thermal stability, less creep, and higher compressive moduli than filled polytetrafluoroethylene /PTFE/. Bearing and seal materials exhibiting the best characteristics contain a high percentage of PTFCE.
Computerized analysis of seal temperature, elastic displacements and seal force balance in iterative design method for gas turbine mainshaft seals
Aircraft high temperature polyimide hydraulic actuator rod seals, discussing design and performance tests
Lubrication technology for space shuttles, discussing vehicles and airbreating and rocket engines