Composite fiber/metal Space Station tankage - Applications, material/process/design trades, and subscale manufacturing/test results

1987 ◽  
Author(s):  
TONY PEARCE ◽  
DALE NEVERMAN ◽  
FRED DARMS ◽  
EDGAR MORRIS
Keyword(s):  
Process Design ◽  
Space Station ◽  
Composite Fiber ◽  
Test Results ◽  
Manufacturing Test ◽  
Material Process ◽  
Fiber Metal

Production of Diffusion Flames in the Near Extinction Limit Regime Using a Hele-Shaw Apparatus in a Simulated Low Gravity Environment

2001 ◽  
Author(s):  
Lisa M. Oravecz-Simpkins ◽  
Indrek S. Wichman
Keyword(s):  
Diffusion Flames ◽  
Space Station ◽  
Scaling Analysis ◽  
Test Results ◽  
Low Gravity ◽  
Flame Instability ◽  
Extinction Limit ◽  
Maximum Test ◽  
Near Extinction ◽  
Flame Instabilities

Abstract A Hele-Shaw apparatus that produced spreading diffusion flames in the near extinction limit was designed and constructed. A scaling analysis was used to determine the maximum test section height for which effects of gravity could be neglected. Preliminary results showed that this apparatus could be used to produce flame instabilities which resemble drop tower test results from NASA [1,2] and other diffusion flame instability studies [3,4,5,6]. Therefore, the Hele-Shaw apparatus is useful for studying flames in a simulated low gravity environment. Additional unstable behaviors seen in the device, such as flame pulsing and spreading blue cusps, not in the NASA testing further supported the need for investigations during longer microgravity times on the International Space Station. The initial testing was only used to gain an observable region of unstable flames. Further studies will be directed at explaining and quantifying specific behaviors with test conditions.

Multilayer and Fiber Metal Laminate Materials Hydro-Bulging

2018 ◽  
Vol 941 ◽  
pp. 1996-2005
Author(s):  
Ehsan Sherkatghanad ◽  
Li Hui Lang ◽  
Shi Chen Liu
Keyword(s):  
Thickness Distribution ◽  
Single Layer ◽  
Experimental Tests ◽  
Middle Layer ◽  
Composite Fiber ◽  
Advanced Materials ◽  
Carbon Cloth ◽  
Stress Strain ◽  
Aluminum Composite ◽  
Fiber Metal

Advanced materials such as aluminum alloys and composites offer great potential for weight reduction applications in automotive and aerospace vehicles construction. In order to investigate the feasibility of using such materials in the form of laminates, sheet bulging with single-layer aluminum and the aluminum/Composite laminate with the carbon cloth as the middle layer is investigated under uniform liquid pressure conditions. The aluminum sheet stress-strain, wall thickness distribution, carbon fiber radius stress-strain distribution and the effect of die entrance radius etc. are discussed and compared in details. FE results validate that the numerical method can predict the same fracture regions for bulging-blank as observed in experimental tests. Furthermore, the study validates that multi-layer sheet hydro-bulging process with composite fiber as a middle layer is not feasible to form laminates due to rupture of composite fibers near edge regions. Further study is needed to improve the methodology.

Active Mass Auto-Balancing System for Centrifuge Rotor Providing an Artificial Gravity in Space

2001 ◽  
Author(s):  
Koichi Ohtomi ◽  
Fumio Otsuki ◽  
Hirohiko Uematsu ◽  
Yasuhiro Nakamura ◽  
Yuichi Chida ◽  
...  
Keyword(s):  
International Space Station ◽  
Centrifugal Force ◽  
Life Science ◽  
Space Station ◽  
Artificial Gravity ◽  
Experimental Facility ◽  
Test Results ◽  
Active Mass ◽  
International Space ◽  
Centrifuge Rotor

Abstract The Centrifuge Rotor (CR) is an artificial gravity generator, which is aiming at launch in 2006 as a portion of the life science experimental facility of the International Space Station (ISS). The CR rotates habitats located radially around the axis and generates centrifugal force, imposing artificial gravity of arbitrary magnitude up to 22.0 m/s2 (about 2.2 g) on the specimens housed in the habitats. The imbalance is caused by the asymmetry of two habitats opposite each other, which brings about change in the mass of the habitats as well as the quasi-static change of the CG of plants and fluids and the dynamic rodent motions in the habitats. The active mass Auto-Balancing System (ABS) is provided for automatic canceling of the above-mentioned imbalance of the rotor. This paper presents the concept and the test results of the ABS.

Superconducting monolithic Nb/sub 3/Sn magnetic system with ceramic insulation, technology of manufacturing-test results

1992 ◽  
Vol 28 (1) ◽  
pp. 877-879 ◽  
Author(s):  
S.A. Lelekhov ◽  
S.I. Novikov ◽  
A.N. Zyravlev ◽  
G.K. Kyznetsov ◽  
V.V. Tanevcki ◽  
...  
Keyword(s):  
Magnetic System ◽  
Test Results ◽  
Manufacturing Test

A New Method about Port Scan of Network Hosts

2011 ◽  
Vol 480-481 ◽  
pp. 190-194
Author(s):  
Xin Chao Han ◽  
Yong Qiang Ma
Keyword(s):  
Process Design ◽  
Design Thinking ◽  
Data Packet ◽  
Assessment System ◽  
New Method ◽  
Security Assessment ◽  
Test Results ◽  
Data Link ◽  
Link Layer ◽  
Data Link Layer

To resolve the question: accurately scanned the port of remote network host through firewall, researched deeply on the existing scan methods, found their weakness, provided a new method about port detection through firewall. Described the design thinking and scan process, design the first part of ETHERNET, send out and receive of the data packet was turned from the IP layer to data link layer. delivered the data packet directly to network hosts. At last, developed the network security assessment system based on this way. Test results show that this method can penetrate firewall and accurately scan the port of remote network host.

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