269 Hits in 9.5 sec

Shock Wave Attenuation Using Foam Obstacles: Does Geometry Matter?

Hongjoo Jeon, Jonathan Gross, Sarah Estabrook, Stylianos Koumlis, Qian Wan, Gauri Khanolkar, Xingtian Tao, David Mensching, Edward Lesnick, Veronica Eliasson
2015 Aerospace (Basel)  
., the side where the incident shock wave impacts, were cut in geometries with one, two, three or four convergent shapes, and the results were compared to a foam block with a flat front face.  ...  Results were obtained by pressure sensors located upstream and downstream of the foam obstacle, in addition to high-speed schlieren photography.  ...  Acknowledgments The authors gratefully acknowledge the support of the National Science Foundation through Grant Number CBET-1437412.  ... 
doi:10.3390/aerospace2020353 fatcat:blnkdnjzd5fmdb3nrt37dyirv4

The Veloce Pulsed Power Generator for Isentropic Compression Experiments

T. Ao, R. Hickman, C. Hall, J. Asay, S. Chantrenne
2007 2007 IEEE Pulsed Power Plasma Science Conference  
Examples of recent ICE studies on aluminum are presented.  ...  Since the compact pulsed power technology used for dynamic material experiments has not been previously used, it is necessary to examine several key issues to ensure that accurate results are obtained.  ...  Also, valuable feedback on this work was provided by Marcus Knudson, Jean-Paul Davis, Dan Dolan, Tom Haill, and Wayne Trott.  ... 
doi:10.1109/ppps.2007.4345509 fatcat:wmaoblaxnbbpxamaogq6trgzti

A review of numerical analysis of friction stir welding

Xiaocong He, Fengshou Gu, Andrew Ball
2014 Progress in Materials Science  
The main methods used in numerical analysis of friction stir welding are discussed and illustrated with brief case studies.  ...  To overcome these problems, numerical analysis has frequently been used since the 2000s.  ...  Acknowledgements This study is partially supported by National Natural Science Foundation of China (Grant No. 50965009) and Special Program of the Ministry of Science and Technology, China (Grant No. 2012ZX04012  ... 
doi:10.1016/j.pmatsci.2014.03.003 fatcat:37o25l3ccfee7gwnaogemkrwdm

Compiled by the American Ceramic Society

1952 Journal of The American Ceramic Society  
to 150° to 300°C. under superatmospheric pressure to form a basic aluminum acid salt.  ...  —A process of forming cellular glass having high resistance to per- meation by water at elevated temperatures and pressures is de- scribed.  ... 
doi:10.1111/j.1151-2916.1952.tb13047.x fatcat:aare67h4ojex5m3u3kyg5doxju


2008 Journal of The American Ceramic Society  
sheet, forming the partially dehydrated and heating the shaped product to D.J.B LEON MERKER Lead Co 1956 4.  ...  Both wire and straps were top of the second sheet a forming die having a bottom recess con considered T.H.E forming to the shape of the tile to be formed, subjecting the two Practical modifications of  ... 
doi:10.1111/j.1151-2916.1957.tb12539_ca.x fatcat:dubvnbsqundapgytzx2zht7jga


1957 Journal of The American Ceramic Society  
sheet, forming the partially dehydrated and heating the shaped product to D.J.B LEON MERKER Lead Co 1956 4.  ...  Both wire and straps were top of the second sheet a forming die having a bottom recess con considered T.H.E forming to the shape of the tile to be formed, subjecting the two Practical modifications of  ... 
doi:10.1111/j.1151-2916.1957.tb12539.x fatcat:4uynw2rulnhjdlnud6i3al5vju

Detection of Submarines

Harvey C. Hayes
1920 Proceedings of the American Philosophical Society  
One form of "C-Tube " developed at the Nahant Station. PLATE XI. a. One form of Double M-F Tube.  ...  Plate VIII. a shows one form of the C-Tube developed at Nahant.  ... 


1956 Journal of The American Ceramic Society  
Weak hydrogen bonding operates within individual water sheets. The water sheets are held together by the exchangeable cations, around which the water molecules tend to form hydration shells.  ...  lattice and thus facilitate the loss of water on drying and the absorption of water on wetting.  ... 
doi:10.1111/j.1151-2916.1956.tb15596.x fatcat:kg736dguljc7zczhpxctcopzsi

Recent Progress in Active Mechanical Metamaterials and Construction Principles

Jixiang Qi, Zihao Chen, Peng Jiang, Wenxia Hu, Yonghuan Wang, Zeang Zhao, Xiaofei Cao, Shushan Zhang, Ran Tao, Ying Li, Daining Fang
2021 Advanced Science  
Considering the controllability and efficiency of the stimuli-responsive materials, physical fields such as, the temperature, chemicals, light, electric current, magnetic field, and pressure have been  ...  The micro and macro structures of the AMMs are designed based on structural construction principles such as, phase transition, strain mismatch, and mechanical instability.  ...  And the iconic spikes will form on the free surface of MRFs.  ... 
doi:10.1002/advs.202102662 pmid:34716676 pmcid:PMC8728820 fatcat:52xnoslwurghpbve4gnepk3yja

Potential of laponite incorporated oxidized alginate–gelatin ( ADA‐GEL ) composite hydrogels for extrusion‐based 3D printing

Fei‐Fan Cai, Susanne Heid, Aldo R. Boccaccini
2020 Journal of Biomedical Materials Research. Part B - Applied biomaterials  
The concept of adding inorganic fillers into hydrogels to form hydrogel nanocomposites often provides advantageous properties which can be exploited for successful 3D biofabrication.  ...  The results showed that the addition of 0.5% (wt/vol) laponite nanoplatelets improved the printability of ADA-GEL hydrogels enabling the fabrication of detailed structures since a low effect of material  ...  CONFLICT OF INTEREST The authors declare no potential conflict of interest.  ... 
doi:10.1002/jbm.b.34771 pmid:33277973 fatcat:a6pe6iytb5cwjgpoimypedlqtm

Global analysis and constructional aspects in the redesign of bearing elements for a movable storm surge barrier

P. Samyn, W. Van Paepegem, J.S. Leendertz, E. Suister, L. Van Schepdael, J. Degrieck, P. De Baets
2007 Engineering structures  
Through the application of an elastic bearing layer, the frictional momentum on the ball-joint is influenced by the stiffness, the thickness and the friction coefficient of the sliding material.  ...  Due to the high forces transmitted between the convex and concave sliding surfaces originating from the hydraulic storm head, waves and wind, a design with thin films consisting of solid lubricants failed  ...  Acknowledgements The authors express their gratitude to the Ministry of Transport, Public Works and Water Management (The Netherlands) and Solico B.V., allowing us to present the test results and to be  ... 
doi:10.1016/j.engstruct.2007.01.012 fatcat:gantdh3lcbettk5wrpwcu3zpce


1956 Journal of The American Ceramic Society  
For use, the dry mixture is stirred with water to form a paste and then brought to about equal parts of water and powder to form a paintlike consistency. D.J.B.  ...  482° to about 705°F. at a sufficient pressure tc maintain a liquid phase of water, and agitating the mixture at the temperature and pressure for a sufficient time to react substantial portions of the aluminum  ... 
doi:10.1111/j.1151-2916.1956.tb15605.x fatcat:lkdqkeucw5c6xcp3tq4rz7uoru


1929 Journal of The American Ceramic Society  
subject- ing the sheets while traveling to pressure to unite them to form a composite sheet.  ...  on the flexible sheet to clamp the series of sheets tightly against the flat rigid bottom of the tray, and a pressure chamber for receiving the tray, with means for applying fluid pressure thereto on  ... 
doi:10.1111/j.1151-2916.1929.tb17059.x fatcat:wmmkmwcerfgotoli37epusl6pa


1955 Journal of The American Ceramic Society  
.— The process makes it possible to briquette glass charge without the use of water glass and without high pressure.  ...  PATENTS Apparatus for controlling the placement or removal of an elas- tic sheet on the forms of a mold. L. Bonner. Fr. 1,075,291, April 14, 1954.  ... 
doi:10.1111/j.1151-2916.1955.tb14552.x fatcat:wkhzltp2v5evxpqkfmbq25gl74

Influence of coal dust on premixed turbulent methane–air flames

Scott R. Rockwell, Ali S. Rangwala
2013 Combustion and Flame  
This work ultimately aims to improve the knowledge on fundamental aspects of dust flames which is essential for the development of mathematical models.  ...  and integral length scale) are systematically analyzed in a spatially uniform cloud of volatile particles forming a stationary flame.  ...  An empirical correlation of the form Turning on HFA: Start water cooling -~10 lph (to much more will rupture water cooling fittings) The water is controlled using the sink taps.  ... 
doi:10.1016/j.combustflame.2012.10.025 fatcat:wvn7qonmqngujinjlcm6uf5bre
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