Relevant bibliographies by topics / Hemispherical dome

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers
  5. Reports

Academic literature on the topic 'Hemispherical dome'

Author: Grafiati
Published: 4 June 2021
Last updated: 2 February 2022

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Journal articles on the topic "Hemispherical dome"

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Krishna, S. Chenna, Satish Kumar Singh, S. V. S. Narayana Murty, Ganji Venkata Narayana, Abhay K. Jha, Bhanu Pant, and Koshy M. George. "Closed Die Hammer Forging of Inconel 718." Journal of Metallurgy 2014 (December 1, 2014): 1–7. http://dx.doi.org/10.1155/2014/972917.

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A method for the production of Inconel 718 (IN-718) hemispherical domes by closed die hammer forging is proposed. Different combination of operations employed for production are as follows: (i) preforging + final forging + air cooling, (ii) preforging + final forging + controlled cooling, (iii) direct forging + controlled cooling, and (iv) direct forging + air cooling. Last three combinations yielded a crack free hemispherical dome. The forged hemispherical domes were solution annealed at 980°C for 1 h and air cooled. The grain size of the domes at all locations was finer than ASTM No 4. Mechanical properties of the forged dome in solution treated and aged condition (STA) were better than feedstock used.
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Taylor, T. J. "Wind pressures on a hemispherical dome." Journal of Wind Engineering and Industrial Aerodynamics 40, no. 2 (June 1992): 199–213. http://dx.doi.org/10.1016/0167-6105(92)90365-h.

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Stathopoulos, T. "Wind pressures on a hemispherical dome." Journal of Wind Engineering and Industrial Aerodynamics 57, no. 1 (June 1995): 111. http://dx.doi.org/10.1016/0167-6105(94)00096-v.

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Abdi, Behzad, Hamid Mozafari, Ayob Amran, and Roya Kohandel. "Thermal Effect on Buckling of General Dome Ends Using Finite Element Method." Applied Mechanics and Materials 121-126 (October 2011): 340–45. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.340.

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In this study, the elastic buckling behavior of general dome ends under presumed temperature distribution and external pressure was studied. The Finite Element Method (FEM) was used to predict the elastic buckling pressure behavior when the domes were subjected to various operating temperatures. The freedom of the edges of the dome ends was completely restricted to simulate clamped end conditions. The four-centered ellipse method was used to construct the geometry of the dome ends. The influence of geometrical parameters such as thickness, knuckle radius, and the ratio of minor axis to the major axis of dome ends and the effect of temperature on critical buckling pressure of hemispherical, ellipsoidal, and torispherical dome ends were studied. It has been found that the under thermal condition, the thickness and the shape of the domes have the most significant effect on the critical buckling pressure. Two models of torispherical and ellipsoidal dome ends are analyzed by using finite element analysis.
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Kharoua, N., and L. Khezzar. "Large eddy simulation study of turbulent flow around smooth and rough domes." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 227, no. 12 (January 22, 2013): 2686–700. http://dx.doi.org/10.1177/0954406212474211.

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Large eddy simulation of turbulent flow around smooth and rough hemispherical domes was conducted. The roughness of the rough dome was generated by a special approach using quadrilateral solid blocks placed alternately on the dome surface. It was shown that this approach is capable of generating the roughness effect with a relative success. The subgrid-scale model based on the transport of the subgrid turbulent kinetic energy was used to account for the small scales effect not resolved by large eddy simulation. The turbulent flow was simulated at a subcritical Reynolds number based on the approach free stream velocity, air properties, and dome diameter of 1.4 × 105. Profiles of mean pressure coefficient, mean velocity, and its root mean square were predicted with good accuracy. The comparison between the two domes showed different flow behavior around them. A flattened horseshoe vortex was observed to develop around the rough dome at larger distance compared with the smooth dome. The separation phenomenon occurs before the apex of the rough dome while for the smooth dome it is shifted forward. The turbulence-affected region in the wake was larger for the rough dome.
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Skuratov, Sergei V., and Sergei V. Shchutsky. "Constructive Solutions of Rod Elements of a Polyhedral Wooden Dome." Materials Science Forum 931 (September 2018): 300–303. http://dx.doi.org/10.4028/www.scientific.net/msf.931.300.

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The method for the formation of a spatial construction of a hemispherical dome in the form of an icosahedral-type 320-gon is considered. The description of pentagonal pyramidal fragments, included in the structure of the dome frame, is described. Constructive solutions of nodal connections of the dome core rods are presented. The results of the design are shown in the illustrations.
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Menna, F., E. Nocerino, and F. Remondino. "FLAT VERSUS HEMISPHERICAL DOME PORTS IN UNDERWATER PHOTOGRAMMETRY." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2/W3 (February 23, 2017): 481–87. http://dx.doi.org/10.5194/isprs-archives-xlii-2-w3-481-2017.

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Underwater photogrammetry, like its counterpart in 'air', has gained an increasing diffusion thanks to the availability of easy-to-use, fast and often quite inexpensive software applications. Moreover, underwater equipment that allows the use of digital cameras normally designed to work in air also in water are largely available. However, for assuring accurate and reliable 3D modelling results a profound knowledge of the employed devices as well as physical and geometric principle is even more crucial than in air. This study aims to take a step forward in understanding the effect of underwater ports in front of the photographic lens. In particular, the effect of dome or flat ports on image quality in 3D modelling applications is investigated. Experiments conducted in a semi submerged indust rial structure show that the tested flat port performs worse than the dome, providing higher image residuals and lower precision and accuracy in object space. A significant different quality per colour channel is also observed and its influence on achievable processing results is discussed.
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Blachut, J., and G. D. Galletly. "Externally Pressurized Hemispherical Fibre-Reinforced Plastic Shells." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 206, no. 3 (May 1992): 179–91. http://dx.doi.org/10.1243/pime_proc_1992_206_114_02.

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The results of external pressure tests on ten 0.8 m diameter torispherical shells made from FRP (fibre-reinforced plastic) were discussed in a recent paper by the authors. In the present paper, the results of similar tests on six hemispherical FRP shells are given. Four of the hemispheres were made from single sheets of woven pre-preg (three of carbon-fibre-reinforced plastic and one of glass-fibre-reinforced plastic): two of those made from carbon-fibre-reinforced plastic (CFRP) were petalled, that is they were made by butt-jointing together pieces of composite cloth. The diameter-average thickness (D/tav) ratios of the hemispherical domes varied from 66 to 108. The BOSOR 4 program was used to predict the stresses in the composite shells and their buckling pressures; the Tsai-Wu equation (in stress space) was utilized for the material failure criterion. For all the shells in this investigation, the controlling failure mode appeared to be first-ply failure (FPF). The latter is, of course, influenced by the compressive strength of the composite. Assuming a reasonable value for this (for example 570 N/mm2 for CFRP) gave ratios of Pexpt/PFPF which were in the range 1.05–1.19. In all cases, the experimental result was higher than the theoretical prediction, that is it was on the safe side. The authors measured the compressive strength of the CFRP composite experimentally. They obtained values in the range 510 ± 100 N/mm2. These were less than values obtained at Imperial College (664 ± 44 N/mm2). At the moment, it is not known why this wide variation in compressive strength was obtained. More work needs to be done on this aspect of the problem. Each of the butt-jointed CFRP hemispherical domes was weaker than its unjointed counterpart. In part, this is due to the increase in thickness of the unjointed hemispheres near the clamped edge, where the failures originated. With the CFRP torispherical domes, the failure location was at the spherical cap/knuckle junction (that is away from the clamped edge) and the butt-jointed torispherical dome turned out to be stronger than its unjointed counterpart. The 30-ply CFRP hemisphere (D/tav = 66) was 1.4 times as strong as the 36-ply GFRP hemisphere (D/tav = 73). In addition, the 30-ply CFRP hemisphere had the same collapse pressure as a geometrically similar welded steel hemisphere which had D/t ≈ 113 and a = σYP = 645 N/mm2. The CFRP dome would be much ligher than the steel one, in the ratio 1:2.8.
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Tiwari, Rajanish N., Wei-Chun Chen, Jitendra N. Tiwari, Wei-Lin Wang, and Li Chang. "Diamond plates on dome-like particles: preparation, characterization and field emission properties." Journal of Applied Crystallography 43, no. 4 (June 19, 2010): 883–89. http://dx.doi.org/10.1107/s0021889810018340.

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Thin diamond microplates have been grown on dome-like/hemispherical carbon particles on titanium carbide by a microwave plasma chemical vapour deposition (MPCVD) method using a gas mixture of methane and hydrogen. The diamond microplates have a thickness of about 200 nm. A thin (300 nm) film of titanium carbide was formed during carburization of sputtered titanium on an Si(100) substrate in MPCVD. The hemispherical carbon particles were covered with diamond microplates. The diamond microplates are isolated electron-emitting spherules and exhibit a low threshold (50 V µm−1) and high current density (0.92 mA cm−2) in their field emission properties. A possible mechanism for the formation of the diamond microplates and hemispherical carbon particles is presented.
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Gohari, Soheil, Abolfazl Golshan, Amin Bassiri Nia, and Mohammadhassan Hashemzadeh. "Prediction of Failure in Thin-Walled Hemispherical GRP Dome Subjected to Static Internal Pressure Based on a Failure Factor." Advanced Materials Research 488-489 (March 2012): 358–66. http://dx.doi.org/10.4028/www.scientific.net/amr.488-489.358.

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Failure analysis of one-ply thin-walled hemispherical GRP dome internally pressurized was checked via analytical approach and finite element simulations using ABAQUS and MATLAB software. Tsai-Wu failure criterion was employed during analysis. The failure factor against changes of dome’s geometrical parameters was investigated. Subsequently, laminated hemispherical GRP dome failure behavior was theoretically analyzed using MATLAB software. During the analysis some geometrical parameters were assumed to be constant. Moreover, symmetrical laminations were taken into account. The Tsai-Wu failure factor was checked based on changes of applied internal pressure, ply thickness, dome’s internal radius and ratio of dome’s internal radius over ply thickness. The behavior was determined to be linear and quadratic both.
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Dissertations / Theses on the topic "Hemispherical dome"

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Platt, Gerald D. "Wind effects on a hemispherical dome." Thesis, Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/101360.

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A review of the past wind tunnel experiments involving the measurement of pressures over the surface of a hemispherical dome is made, and the flow parameters of these experiments are compared. A hemispherical dome is subjected to a flow in the open-throat wind tunnel at VPI&SU, and the resulting pressure measurements are given. An experiment utilizing the 6-ft square stability wind tunnel at VPI&SU to measure the pressures over the surface of a hemispherical dome is organized but not conducted. ABAQUS, a nonlinear finite element program, is used to analyze a hemispherical, lamella dome subjected to a wind load. The dome is first modeled by using truss elements and then beam elements. A comparison of the two models is made.
M.S.
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Fang, Shuo. "Application of Fast-Responding Pressure-Sensitive Paint to a Hemispherical Dome in Unsteady Transonic Flow." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1293736583.

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Koopman, Andrew Ernest. "USING PATTERNED SURFACE WETTABILITY TO ENHANCE AIR-SIDE HEAT TRANSFER THROUGH FROZEN WATER DROPLET VORTEX GENERATORS." Miami University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=miami1578672613073125.

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Lin, Hong-Ming, and 林鶴鳴. "The wind effect on hemispherical dome in turbulence boundary layer." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/28329379179396803763.

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碩士
淡江大學
水資源及環境工程所
82
The study applies the wind tunnel experiment to explore the wind load of a round top of a giant dome structure in an open - field atmospheric boundary layer . The mean pressure corfficient、drag coefficient and fluctuating pressure coefficient , and the mean velocity profile and turbulence intensity in the near wake of the structure will be used as reference for the reseach and design of a giant dome gymnasium . The four experimental models have different surface corresponding roughness for each , and the flow field Reynolds numbers are limited between 1.1x10^5 ~5.7x10^5 . From the results the largest positive pressure coefficient of the round top of the smooth-surface model in the open-field atmospheric boundary layer is 0.5 and appears to be at the adjoining point of the round top in wind direction and the bottom of the cylinder ; the least negative pressure coefficient is -1.3 and near is the place of the elevation angle 80 degrees of the round top ; and the scattered separation point on the round top are around 145 degrees . However the possitive pressure corfficient of the roungh-surface models decreases to 0.45 ; while it appears at the same location compared to the smooth and the upper stream of the place of the elevation angle of 75 degree . At this time , the place of the separation point in the boundary layer of the round top also rises back to the elevation angle of 110 degree .
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Liu, Hao-Ju, and 劉皓汝. "Les Simulation of Aerodynamic Characteristic of Hemispherical Dome in Smooth Approaching Flow." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/92744857383846658917.

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碩士
淡江大學
土木工程學系碩士班
101
This study uses LES to simulate the aerodynamic characteristics of hemispherical dome in a smooth approaching flow field. The accuracy of numerical simulation was verified firstly by comparing with the wind tunnel measurements. Then the details of the aerodynamics of the dome were presented in this thesis. Prior to study the dome aerodynamics, several schemes of the grid system and numerical parameters were examined to determine the optimal ones for this study. The numerical simulation in this thesis can be categorized into two parts: the aerodynamics of dome in two Reynolds numbers, Re=6.6×104 and 2×106. In the case of Re=6.6×104, the mean and RMS pressure coefficients on the center meridian are noticeably deviated from experiment data. The numerical error may be caused by two reasons. The first probable source of error is that the separation bubble in the wake region extent beyond the mesh refined area. The second one is more subtle. At subcritical Reynolds number, the boundary layer developed over the dome surface is of laminar nature; it transits to become turbulent flow after separated from dome surface. Whether the basic setting of CFD tool, ANSYS-FLUENT, is apt to such a complex numerical simulation is to be confirmed. As for the second case, Re=2×106, the mean and RMS pressure coefficients on the center meridian agree well with experiment data except near the front stagnation area. The power spectral densities of the numerical simulated pressure fluctuations also agree with wind tunnel measurements satisfactory. Only the probability densities of the numerical simulation exhibit deviations from the wind tunnel data. It indicates that although the current numerical simulation scheme can reproduce the hemi-spherical dome’s aerodynamic quite well; it is still insufficient to generate the small scale turbulence that contributes to the pressure peaks. The lift force spectrum exhibits multiple peaks; which indicate the complexity of the vortex shedding in the horizontal plane. The time history of the vorticity further demonstrate that there exists no clear interaction between two separated free shear layers of the two opposite side of the dome; however, the wake flow show rather periodic sway synchronized with the variation of lift force coefficient.
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Combley, James Harold. "Stress concentrations around an axisymmetrically attached nozzle on a glass reinforced plastic hemispherical dome." Thesis, 2015. http://hdl.handle.net/10539/16527.

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Fu, Chung-Lin, and 傅仲麟. "characteristic of wind load on a hemispherical dome in smooth flow and tubulent boundary layer flow." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/46688379016301767458.

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博士
淡江大學
土木工程學系博士班
98
Due to the structural efficiency and economic benefit, the hemispherical dome is a common structural geometry shape for large span sports stadiums or for storage purposes. The curved shape makes the accurate estimation of the wind pressure fluctuations on a hemispherical dome a difficult task due to the Reynolds number effects. A series of wind tunnel tests were performed to investigate the effects of Reynolds number on the aerodynamic characteristics of hemispherical dome in smooth and turbulent boundary layer flows. Reynolds number of this study varies from 5.3 × 104 to 2.0 × 106. Instantaneous pressures were measured through high frequency electronic scanner system. Mean and RMS pressure coefficients on the center meridian and the overall pressure patterns of domes were calculated for comparative study. The results indicate that, In the smooth flow, the transition phenomenon of separated free shear layer occurs near Re=1.8×105 ~ 3.0×105；The separation/reattachment occurs in this Reynolds number region. The mean and R.M.S. pressure distributions become relatively stable after Re>3.0×105. The mean meridian drag coefficient decreases with Reynolds number for Re<3.0×105, and then increase monotonically up to Re=2.0×106; RMS meridian drag coefficient shows maximum and minimum values at Re≒1.5×105 and 3.0×105, respectively. The correlation coefficients of mean and RMS pressure contours indicate that, the pressure distributions become relatively stable at Re=2.0~3.0×105. In turbulent flow, the transition phenomenon of separated free shear layer occurs at a lower Reynolds number, Re<1.1×105, and both mean and RMS pressure distributions approach Reynolds number independent when Re=1.2~1.5×105. The mean and RMS meridian drag coefficients, Cd and Cd’, become invariant when Re>2×105. The correlation coefficients of mean and RMS pressure contours indicate that, in turbulent boundary layer flow, the pressure distributions become Reynolds number independent at Re=1.0~2.0×105. The Proper Orthogonal Decomposition (POD) was then applied to the pressure measurements of the uniformly distributed dome to study the wind load patterns of the hemisphere dome in both smooth and turbulent boundary layer flows. For a hemisphere dome submerges in a turbulent flow, the fluctuating energy concentrated the few POD mode. For the dome in smooth flow, however, the fluctuating energy is spread over large number of POD modes.
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Book chapters on the topic "Hemispherical dome"

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Ogawa, T., and T. Suzuki. "Finite Element Simulation of Three-Dimensional Wind Flow Around A Hemispherical Dome." In Computational Mechanics ’88, 1497–500. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-61381-4_394.

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Patil, Jeet P., Yogesh S. Gaikhe, Vilas Nandedkar, and Sushil Mishra. "Effect of Sheet Temperature on Thickness Distribution of the Thermoformed Hemispherical Dome." In Lecture Notes in Mechanical Engineering, 479–87. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-7779-6_42.

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Barik, Saibal Kanchan, Niranjan Sahoo, and Nikki Rajaura. "Deformation Assessment of Stainless Steel Sheet Using a Shock Tube." In Applications and Techniques for Experimental Stress Analysis, 134–52. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-1690-4.ch009.

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In the present study, a high-velocity sheet metal forming experiment has been performed using a hemispherical end nylon striker inside the shock tube. The striker moves at a high velocity and impacts the sheet mounted at the end of the shock tube. Three different velocity conditions are attained during the experiment, and it helps to investigate the forming behavior of the material at different ranges of velocity conditions. Various forming parameters such as dome height, effective strain distribution, limiting strain, hardness, and grain structure distribution are analysed. The dome height of the material increases monotonically with the high velocity. The effective-strain also follows the similar variation and a bi-axial stretching phenomenon is observed. The comparative analysis with the quasi-static punch stretching process illustrates that the strain limit is increased by 40%-50% after the high-velocity forming. It is because of the inertial effect generated on the material during the high-velocity experiment, which stretches the sheet further without strain localization.
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Kosick, Rebecca. "Lyrical Matters and Posthuman Poetics in Anne Carson’s Nox." In Material Poetics in Hemispheric America, 171–200. Edinburgh University Press, 2020. http://dx.doi.org/10.3366/edinburgh/9781474474603.003.0006.

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Focused on Anne Carson’s Nox, this chapter address the relationships between lyric and matter, person and poem. It argues that Nox, an accordion-fold book in a box composed as an elegy to the poet’s brother Michael, constitutes a materialisation of the famous Roman lyric, Catullus 101. Rather than antagonising or excising the lyric, as prior approaches to material poetics had done, Nox turns 101’s described relations into material ones. The poem and its translations join with the textual remnants left behind by Carson’s brother – letters, photographs, recounted speech – to constitute a posthuman elegy, made from the matters of lyric and life. This chapter argues that contemporary material poetry, as Nox represents it, counters the assumption that practices akin to concrete poetry died after the mid-twentieth century, or were resurrected solely as a reaction to the digital age. As the examples in this book show, practices in material poetry continued steadily through the decades and went on to demonstrate elasticity and endurance. Nox, in particular, exhibits an ability to materially incorporate apparently antagonistic poetic types as the very matter of its poetics.
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Conference papers on the topic "Hemispherical dome"

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Shiri, Ron, Patrick L. Coronado, Emily L. Lunde, and Manuel A. Quijada. "Hemispherical optical dome for underwater communication." In Laser Communication and Propagation through the Atmosphere and Oceans VI, edited by Alexander M. van Eijk, Stephen M. Hammel, and Jeremy P. Bos. SPIE, 2017. http://dx.doi.org/10.1117/12.2274100.

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David Bourke, Paul, and Dalai Quintanilha Felinto. "Blender and Immersive Gaming in a Hemispherical Dome." In Annual International Conferences on Computer Games, Multimedia and Allied Technology. Global Science & Technology Forum (GSTF), 2010. http://dx.doi.org/10.5176/978-981-08-5480-5_003.

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Park, Byounghun, Kyungmook Kwon, and Kyoungsik Yu. "Non-imaging fluorescence detection system with hemispherical dome reflectors." In 2012 IEEE Photonics Society International Conference on Optical MEMS and Nanophotonics. IEEE, 2012. http://dx.doi.org/10.1109/omems.2012.6318870.

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Bourke, Paul. "Omni-directional Stereoscopic Fisheye Images for Immersive Hemispherical Dome Environments." In Annual International Conferences on Computer Games, Multimedia and Allied Technology. Global Science & Technology Forum (GSTF), 2009. http://dx.doi.org/10.5176/978-981-08-3190-5_453.

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Menna, Fabio, Erica Nocerino, and Fabio Remondino. "Optical aberrations in underwater photogrammetry with flat and hemispherical dome ports." In SPIE Optical Metrology, edited by Fabio Remondino and Mark R. Shortis. SPIE, 2017. http://dx.doi.org/10.1117/12.2270765.

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Siefers, Timothy M., Randy J. Frost, Sangmin Lim, and Thomas E. McLaughlin. "Wind Induced Forces on a Hemispherical Observatory Dome with Open Shutter Doors." In 55th AIAA Aerospace Sciences Meeting. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2017. http://dx.doi.org/10.2514/6.2017-1216.

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Chandra, K. Ravi, and Satadal Ghosh. "Hu-Moment-Based Autonomous Landing of a UAV on a Hemispherical Dome." In 2019 International Conference on Unmanned Aircraft Systems (ICUAS). IEEE, 2019. http://dx.doi.org/10.1109/icuas.2019.8797936.

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Bender, Michael J., Robert C. Guyer, and Thomas E. Fenton. "Design and test of an airborne IR countermeasures hyper-hemispherical silicon dome." In Optical Engineering + Applications, edited by Alson E. Hatheway. SPIE, 2007. http://dx.doi.org/10.1117/12.735701.

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Al-Hashimi, H., A. C. Seibi, and A. Molki. "Experimental Study and Numerical Simulation of Domes Under Wind Load." In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77801.

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Dome structures are of architectural significance in many applications ranging from building decorations to fluid confinement usage such as pressure vessels and storage tanks in the petrochemical industry. Most domes are subjected to severe external loads caused by wind flow. Therefore, careful material selection and structural design of domes is imperative to avoid any unexpected failure. This paper presents the design of an experimental set-up to study the flow behavior around ABS dome models of hemispherical and elliptical shapes and their structural integrity under wind loads. The objective of this paper is to determine the dome’s wall thickness for various geometrical shapes. The domes were placed inside a wind tunnel where the wind speed was varied from 60 to 100 km/hr and pressure distribution on the surface of the dome roof was measured. Pressure measurements were carried out for various attack angles with respect to its centerline using a data acquisition system programmed in LabVIEW™. In addition, flow visualization of the air flow around the dome was carried out using a smoke generator. The experimental study was supplemented by a numerical simulation of the air flow around domes to mimic experiments using Computational Fluid Dynamics (CFD) techniques. The effect of wind on the dome structural integrity was studied using finite element analysis. The experimental results were used to validate the CFD models from which pressure distribution around domes were obtained. Results related to the pressure distribution around domes obtained from the CFD analysis were used as loading conditions to study the structural integrity of the domes using ANSYS™. Preliminary experimental results of wind speed effect on a hemispherical/elliptical dome revealed pressure variations for various angles of attack and height inclination along the dome roof surface.
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Nikhare, Chetan P., Emmett Vorisek, John Nolan, and John T. Roth. "Understanding the Differences in Hemispherical Dome and Biaxial Test During Equi-Biaxial Tension on Cruciform." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-67117.

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One metal manufacturing process which uses thousands of processes to trim, stretch, draw, bend etc. under a big umbrella is sheet metal forming. Using heavy equipment, the sheet metal parts are deformed into complex geometries. The complexity in these parts produces multi-axial stress and strain, a state for which it is critical to analyze using conventional tools. Traditionally, the mechanical properties of materials have been characterized using the uniaxial tension test. This test is considered adequate for simple forming operations where single axis loading is dominant. Previous studies, however, have noted that the data acquired from this type of testing is not enough and additional details in other axes under simultaneous deformation conditions are important. To analyze the biaxial strain, some studies have suggested using the limiting dome height test and bulge test. However, these tests limit the extent of using multi-axial loading and the resulting stress pattern due to contact surfaces. Therefore, researchers devised the biaxial machine which is designed specifically to provide biaxial stress components using multiple and varying loading conditions. The idea of this work is to evaluate the relationship between the dome test data and the biaxial test data. For this comparison, cruciform specimens with a diamond shaped thinner gage in the center were deformed with biaxial stretching on the biaxial testing machine. In addition, the cruciform specimens were bi-axially stretched with a hemispherical punch in a conventional die-punch setting. Furthermore, in each case, the process was simulated using a 3D model generated on ABAQUS. These models were then compared with the experimental results. The forces on each arm, strain path, forming and formability was analyzed. The differences between the processes were detailed. It was found that biaxial tests eliminated the pressurization effect which could be found in hemispherical dome tests.
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Reports on the topic "Hemispherical dome"

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Hollins, Richard A., Linda F. Johnson, Mark Moran, Lee Cambrea, and Daniel C. Harris. A Fixture to Measure Optical Transmission of Hemispheric Domes. Fort Belvoir, VA: Defense Technical Information Center, September 2009. http://dx.doi.org/10.21236/ada512344.

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