Composite Stress Rupture: A New Reliability Model Based on Strength Decay [PDF]
A model is proposed to estimate reliability for stress rupture of composite overwrap pressure vessels (COPVs) and similar composite structures. This new reliability model is generated by assuming a strength degradation (or decay) over time.
Reeder, James R.
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Tapered Roller Bearing Accelerated Life Test Rig Design and Fabrication [PDF]
, 2016 L10 bearing fatigue life testing is a costly and prolonged process, as the bearing is characteristically designed for durability and reliability. Within the current testing methods, faulty materials still have the potential of passing the test.
Naeem, Laith +3 more
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Advanced Rotorcraft Transmission (ART) program-Boeing helicopters status report [PDF]
The Advanced Rotorcraft Transmission (ART) program is structured to incorporate key emerging material and component technologies into an advanced rotorcraft transmission with the intention of making significant improvements in the state of the art (SOA).
Lenski, Joseph W., Jr., Valco, Mark J.
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Tests regarding parameters of several independent gamma populations [PDF]
Gamma distribution has been used with considerable success in reliability studies and life testing experiments. This distribution assumes various forms as its shape parameter varies which makes it suitable for analyzing a variety of lifetime data.
Ram Tripathi
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Helicopter transmission research at NASA Lewis Research Center [PDF]
A joint helicopter transmission research program between NASA Lewis Research Center and the U.S. Army Aviation Systems Command has existed since 1970. Program goals are to reduce weight and noise and to increase life and reliability.
Coe, Harold H. +3 more
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Evaluation of the concept of pressure proof testing fuselage structures [PDF]
The FAA and NASA have recently completed independent technical evaluations of the concept of pressure proof testing the fuselage of commercial transport airplanes. The results of these evaluations are summarized. The objectives of the evaluations were to
Harris, Charles E., Orringer, Oscar
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Research Present Status and Outlook of Harmonic Reducer Testing Technology
Jixie chuandong, 2018 As a kind of high-performance and precision transmission device with large transmission ratio,high transmission efficiency,high transmission precision,smooth transmission and low noise,harmonic reducer is more and more widely used in industrial robots ...
Tao Menglun +6 more
doaj
Cryostatless high temperature supercurrent bearings for rocket engine turbopumps [PDF]
The rocket engine systems examined include SSME, ALS, and CTV systems. The liquid hydrogen turbopumps in the SSME and ALS vehicle systems are identified as potentially attractive candidates for development of Supercurrent Bearings since the temperatures ...
Dill, James F., Rao, Dantam K.
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Lifetime Reliability Prediction of Ceramic Structures Under Transient Thermomechanical Loads [PDF]
An analytical methodology is developed to predict the probability of survival (reliability) of ceramic components subjected to harsh thermomechanical loads that can vary with time (transient reliability analysis).
Gyekenyesi, John P. +2 more
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Helicopter transmission testing at NASA Lewis Research Center [PDF]
The helicopter has evolved into a highly valuable air mobile vehicle for both military and civilian needs. The helicopter transmission requires advanced studies to develop a technology base for future rotorcraft advances.
Coy, John J., Lewicki, David G.
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