Results 71 to 80 of about 17,100 (191)

Index to 1984 NASA Tech Briefs, volume 9, numbers 1-4 [PDF]

, 1987
Short announcements of new technology derived from the R&D activities of NASA are presented. These briefs emphasize information considered likely to be transferrable across industrial, regional, or disciplinary lines and are issued to encourage ...

core   +1 more source

Machine tools and fixtures: A compilation [PDF]

Innovations developed by NASA, AEC, and their contractors concerning tools, adaptors, jigs, and fixtures useful in machining a wide variety of materials are ...

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Evolution law of corona bond of non-magnetic drill rod weld by friction welding

Hanjie xuebao
In this paper, experiments and numerical simulations were conducted to study the evolution law of the corona bond at the interface of non-magnetic steel by continuous drive friction welding and the reasons for the appearance of banded structures at the ...
Tiantian XUE, Shiqing WANG, Guodong WEN, Junlei QI, Wang GAO, Xiaowei LUO, Yongxin LU   +6 more
doaj   +1 more source

Friction pull plug welding: dual chamfered plate hole [PDF]

, 2001
Friction Pull Plug Welding (FPPW) is a solid state repair process for defects up to one inch in length, only requiring single sided tooling (OSL) for usage on flight hardware.
Cantrell, Mark A., Coletta, Edmond R.
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Adhesion between atomically clean surfaces [PDF]

Adhesion mechanisms between solid metal ...
Keller, D. V., Jr.
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Automotive Stirling Engine Development Program [PDF]

Mod I engine testing and test results, the test of a Mod I engine in the United States, Mod I engine characterization and analysis, Mod I Transient Test Bed fuel economy, Mod I-A engine performance are discussed.
Antonelli, M., Ernst, W., Nightingale, N., Richey, A., Simetkosky, M., Smith, G.   +5 more
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Marshall Space Flight Center Research and Technology Report 2019 [PDF]

Today, our calling to explore is greater than ever before, and here at Marshall Space Flight Centerwe make human deep space exploration possible. A key goal for Artemis is demonstrating and perfecting capabilities on the Moon for technologies needed for ...
Dankanich, John W., Morris, Heather C.
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An overview of welding in solid state [PDF]

, 2008
The importance of the Solid State Processes (SSP) has increased in the last decade due to the industry demands of improved properties of joined/surfaced materials, combined with cost reduction and energy saving.
Iordachescu, Mihaela, Scutelnicu, Elena
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Studies of interface damping Summary technical report, 25 Aug. 1967 - 25 Mar. 1968 [PDF]

Air flow and vacuum effects on damping between solid-solid sliding interfaces in aluminum space structures in relation to surface oxide ...
Brown, R. D., Lindholm, U. S., Yeakley, L. M.   +2 more
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Experimental and FEM Studies of Continuous Drive Friction Welding of Ferritic Spheroidal Graphite Cast Iron

Processes
Experimental and FEM studies of the friction welding process of spheroidal graphite cast iron (SGCI) are presented. A coupled thermal and mechanical 2.5 D FEM model was used to simulate the continuous drive friction welding (CDFW) process. The FE model predicted the peak temperature of the joint, effective stress, axial shortening, and the weld flash ...
Radosław Winiczenko, Andrzej Skibicki
openaire   +1 more source