An Antenna Characterization Demo System Using an RFID Hemispherical Dome [Education Corner]

2020 ◽  
Vol 62 (3) ◽  
pp. 107-123
Author(s):  
Yasmine Abdalla ◽  
Monica Wasfy ◽  
Samar Elmeadawy ◽  
Nada Abdelhadi ◽  
Hany F. Hammad
Keyword(s):  
Hemispherical Dome

Influence of thickness of hemispherical dome on aerodynamic thermal radiation

2018 ◽  
Vol 47 (12) ◽  
pp. 1204002
Author(s):  
王 惠 Wang Hui ◽  
党凡阳 Dang Fanyang ◽  
张荣达 Zhang Rongda ◽  
明 月 Ming Yue ◽  
范志刚 Fan Zhigang
Keyword(s):  
Thermal Radiation ◽  
Hemispherical Dome

scholarly journals Application of fast-responding pressure-sensitive paint to a hemispherical dome in unsteady transonic flow

2010 ◽  
Vol 50 (6) ◽  
pp. 1495-1505 ◽  
Author(s):  
Shuo Fang ◽  
Kevin J. Disotell ◽  
Samuel R. Long ◽  
James W. Gregory ◽  
Frank C. Semmelmayer ◽  
...  
Keyword(s):  
Transonic Flow ◽  
Pressure Sensitive Paint ◽  
Pressure Sensitive ◽  
Hemispherical Dome

scholarly journals Cracking Patterns of Brittle Hemispherical Domes: an Experimental Study

2021 ◽  
Vol 16 (59) ◽  
pp. 265-310
Author(s):  
Siwen Cao ◽  
Andras A. Sipos
Keyword(s):  
Experimental Study ◽  
Tensile Strength ◽  
Size Distribution ◽  
Crack Formation ◽  
Fragmentation Model ◽  
Track Record ◽  
Hemispherical Dome ◽  
3D Printed ◽  
Loading Tests ◽  
Cracking Pattern

Crack formation in hemispherical domes is a distinguished problem in structural mechanics. The safety of cracked domes has a long track record; the evolution of the cracking pattern received less attention. Here, we report displacement-controlled loading tests of brittle hemispherical dome specimens, including the evolution of the meridional cracking pattern. The 27 investigated specimens, 20 cm in diameter, were prepared in 3D printed molds, and their material is one of the three mixtures of gypsum and cement. We find that neither the (limited) tensile strength nor the exact value of the thickness significantly affects the statistical description of the cracking pattern, i.e., the cracking phenomenon is robust. The maximal number of the meridional cracks never exceeds seven before the fragments’ disintegration (collapse). We find that the size distribution of the fragments exhibits a lognormal distribution. The evolution is reflected in the load-displacement diagrams recorded in the test, too, as significant drops in the force are accompanied by an emergence of one or more new cracks, reflecting the brittle nature of the phenomenon. A simple, stochastic fragmentation model, in which a segment is fragmented at either in the middle or at the fourth point, fairly recovers the observed size distribution.

Discrete tubular supports on pressure vessels

1967 ◽  
Vol 2 (1) ◽  
pp. 17-27 ◽  
Author(s):  
R Kitching ◽  
B E Olsen
Keyword(s):  
Stress Analysis ◽  
Pressure Vessels ◽  
Cylindrical Vessel ◽  
Experimental Stress ◽  
Experimental Stress Analysis ◽  
Hemispherical Dome

An experimental stress analysis has been carried out on three tubular supports welded to the lower hemispherical dome of a cylindrical vessel having its axis vertical and being subjected to vertical loads. A procedure (based an a method previously used for webbed brackets) for calculating shell stresses in the vicinity of the supports was examined and was found to be reliable.

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