scholarly journals Influence of the geometrical researches of surfaces of revolution and translation surfaces on design of unique structures

2019 ◽  
Vol 15 (4) ◽  
pp. 308-314 ◽  
Author(s):  
Gérard Léopold Gbaguidi Aisse
Keyword(s):  
Computer Modeling ◽  
Real Structure ◽  
Building Structures ◽  
Surfaces Of Revolution ◽  
Translation Surfaces ◽  
Fractal Surfaces ◽  
Thin Walled Structures ◽  
The World ◽  
Thin Walled ◽  
The Relationship

Aims of research. The use, design and analysis of architectural and building structures in the form of smooth and composite surfaces have become relevant and in demand lately, which determined the purpose of this article - to analyze the use of analytical surfaces given vector, parametric or explicit equations in real structures. Methods. The relationship between studies on the geometry of surfaces of revolution and transport and the creation of new forms of thin-walled structures and buildings is determined. An example of a real structure is given on each surface. The article does not consider composite, multifaceted, fractal surfaces, as well as surfaces that are not defined analytically. Results. It turned out that only a small number of considered surfaces of these two classes have found application in the world. At the end of the article, a bibliography is presented, which sets out the mathematical side of the design of analytical surfaces, their computer modeling, more detailed information about real structures in the form of the surfaces under consideration.

Deformation Analysis Method for Aeronautical Thin Walled Structures with Automated Riveting

2012 ◽  
Vol 271-272 ◽  
pp. 1526-1530
Author(s):  
Hui Cheng ◽  
Yuan Li ◽  
Kai Fu Zhang ◽  
Feng Guo
Keyword(s):  
New Method ◽  
Deformation Analysis ◽  
Analysis Method ◽  
Thin Walled Structures ◽  
Final Assembly ◽  
Thin Walled ◽  
The Relationship

The assembly variation of Aeronautical Thin Walled Structure (ATWS) with automated riveting is inevitable. The deformations of drilling, riveting and releasing are ralated to the final assembly variation. This paper represents a new method for deformation analysis of ATWS with automated riveting. Drilling deformation is modeled by the relationship among deflexion, strain and stress, riveting deformation is modeled by uilibrium equation, and releseaing deformation is modeled by releasing force. The comparison between computing result and expriment proves that the purposed deformation analysis method can solve the problem for ATWS automated riveting efficiently.

A characteristic type of instability in the large deflexions of elastic plates. I. Curved rectangular plates bent about one axis II. Flat square plates bent about all edges

1952 ◽  
Vol 214 (1116) ◽  
pp. 98-118 ◽  
Keyword(s):  
Bending Moment ◽  
Rectangular Plates ◽  
Elastic Plates ◽  
Surfaces Of Revolution ◽  
Characteristic Type ◽  
Axis Ii ◽  
Curved Structures ◽  
Thin Walled Structures ◽  
Instability Characteristic ◽  
Thin Walled

Part I . From a general equation governing the bending of thin elastic plates into certain types of surfaces of revolution are derived expressions for the behaviour of rectangular plates with initial curvatures, subjected to pure bending about one axis. It is found that such plates exhibit the type of instability characteristic of thin-walled structures which depend for their stiffness on curvature. Curves are drawn showing the deformation suffered by such plates, and an expression for the critical bending moment at which instability occurs is obtained. Experimental results show satisfactory agreement. Part II . The analysis of part I is extended to deal with the case of flat square or rectangular plates loaded by distributed bending moments applied to all four edges. Curves are drawn to describe their behaviour, and they are found to exhibit the characteristic instability displayed by thin-walled curved structures. Experimental verification is satisfactory.

Spherical shape stability of shells and cavities

2007 ◽  
Vol 5 ◽  
pp. 38-59 ◽  
Author(s):  
M.A. Ilgamov
Keyword(s):  
Spherical Shape ◽  
Past Century ◽  
Shape Stability ◽  
Thin Walled Structures ◽  
The World ◽  
Thin Walled ◽  
The Stability ◽  
Working Media ◽  
Reliable Methods ◽  
Spherical Shape Stability

Thin-walled shells characteristic of their light weight and strength are used everywhere – in household items to ocean liners and space rockets. Their applications are so diversified and uncountable that one can safely say, ”The world consists of shells; the world rests on shells.” After all, the Earth’s crust is also a shell. The wide application of thin-walled structures has triggered the need for developing reliable methods to calculate their strength and stability, and this is just the research subject of the shell theory, a new branch of mechanics arisen in the past century. The important role is found to be played by their interaction with working media. The present paper discusses the issues on the stability of spherical thin-walled shells and gas cavities in liquid.

Influence of Boundary Conditions on the Critical and Failure Load in the GFPR Channel Cross-Section Columns Subjected to Compression

2015 ◽  
Vol 240 ◽  
pp. 212-217 ◽  
Author(s):  
Mariusz Urbaniak ◽  
Andrzej Teter ◽  
Tomasz Kubiak
Keyword(s):  
Boundary Conditions ◽  
Cross Section ◽  
Failure Load ◽  
Channel Cross Section ◽  
Building Structures ◽  
Composite Columns ◽  
Beam Columns ◽  
Thin Walled Structures ◽  
Sport Industry ◽  
Thin Walled

Thin-walled structures are widely used in building structures such as thin-walled vessels or storage tower, beam-columns of houses and halls, as components for cars, boats or airplanes and in sport industry. These types of structures are made not only as steel, but nowadays of composite materials.This paper deals with buckling and postbuckling behaviour and presents the experimental results for thin-walled composite columns with channel cross-section subjected to compression.

Investigation on a Relationship Between Hemodynamics and Wall-Thinning in an Unruptured Human Cerebral Aneurysm

2012 ◽  
Author(s):  
Yasutaka Tobe ◽  
Takanobu Yagi ◽  
Sara Takahashi ◽  
Yuki Iwabuchi ◽  
Momoko Yamanashi ◽  
...  
Keyword(s):  
Blood Flow ◽  
Cerebral Aneurysm ◽  
Medical Images ◽  
Cerebral Aneurysms ◽  
Flow Simulation ◽  
Patient Specific ◽  
Thin Walled Structures ◽  
Aneurysm Wall ◽  
Thin Walled ◽  
The Relationship

Recent studies of cerebral aneurysms are held using the blood flow simulation with patient-specific luminal geometries. In the study of development of cerebral aneurysms, wall shear stress (WSS) is focused as one of the key factors1–2. But the answer to the relationship between the extension of aneurysm and the theory of low WSS and high WSS still remains a question. One reason this question remains unsolved is because the current research about the cerebral aneurysms are held only using the vascular geometry developed from the medical images. From the intra-operative observation of cerebral aneurysms, the appearance of the cerebral aneurysm is not unified. Certain parts of the cerebral aneurysm have thin-walled structures where the blood flow of the aneurysm can be observed through the aneurysm wall. These differences in the wall structures cannot be predicted from the medical images. The purpose of this study is to see the relationship between hemodynamic patterns and thin-walled structure in human cerebral aneurysms.

Kazakhstan’s Economic Growth in the Context of the World Economy

2006 ◽  
pp. 133-146 ◽  
Author(s):  
K. Arystanbekov
Keyword(s):  
Economic Growth ◽  
Economic Policy ◽  
World Economy ◽  
World Ocean ◽  
Direct Access ◽  
Crude Petroleum ◽  
Nation States ◽  
The World ◽  
The Relationship

Kazakhstan’s economic policy results in 1995-2005 are considered in the article. In particular, the analysis of the relationship between economic growth and some indicators of nation states - population, territory, direct access to the World Ocean, and extraction of crude petroleum - is presented. Basic problems in the sphere of economic policy in Kazakhstan are formulated.

Virginia Woolf and Being-in-the-world

2017 ◽  
Author(s):  
Emma Simone
Keyword(s):  
Virginia Woolf ◽  
Historical Context ◽  
The Political ◽  
Cartesian Dualism ◽  
Self And Other ◽  
The World ◽  
Binary Oppositions ◽  
The Individual ◽  
The Relationship ◽  
Existential Perspective

Virginia Woolf and Being-in-the-world: A Heideggerian Study explores Woolf’s treatment of the relationship between self and world from a phenomenological-existential perspective. This study presents a timely and compelling interpretation of Virginia Woolf’s textual treatment of the relationship between self and world from the perspective of the philosophy of Martin Heidegger. Drawing on Woolf’s novels, essays, reviews, letters, diary entries, short stories, and memoirs, the book explores the political and the ontological, as the individual’s connection to the world comes to be defined by an involvement and engagement that is always already situated within a particular physical, societal, and historical context. Emma Simone argues that at the heart of what it means to be an individual making his or her way in the world, the perspectives of Woolf and Heidegger are founded upon certain shared concerns, including the sustained critique of Cartesian dualism, particularly the resultant binary oppositions of subject and object, and self and Other; the understanding that the individual is a temporal being; an emphasis upon intersubjective relations insofar as Being-in-the-world is defined by Being-with-Others; and a consistent emphasis upon average everydayness as both determinative and representative of the individual’s relationship to and with the world.

A Māori Girl Watches, Listens, and Learns – Coming of Age from an Indigenous Viewpoint: Mauri (Merata Mita, 1988)

2018 ◽  
Author(s):  
Alistair Fox
Keyword(s):  
Indigenous People ◽  
Coming Of Age ◽  
Natural World ◽  
Feature Film ◽  
Indigenous Woman ◽  
Spiritual Dimension ◽  
The World ◽  
Life Force ◽  
Relationship Of ◽  
The Relationship

This chapter examines Merata Mita’s Mauri, the first fiction feature film in the world to be solely written and directed by an indigenous woman, as an example of “Fourth Cinema” – that is, a form of filmmaking that aims to create, produce, and transmit the stories of indigenous people, and in their own image – showing how Mita presents the coming-of-age story of a Māori girl who grows into an understanding of the spiritual dimension of the relationship of her people to the natural world, and to the ancestors who have preceded them. The discussion demonstrates how the film adopts storytelling procedures that reflect a distinctively Māori view of time and are designed to signify the presence of the mauri (or life force) in the Māori world.

On Metaphysics and the Political: A Polemics of Reading Baudelaire in the 1930s

2019 ◽  
Vol 58 (2) ◽  
pp. 249-259
Author(s):  
Joseph Acquisto
Keyword(s):  
Twentieth Century ◽  
Political Crisis ◽  
The Political ◽  
Modern Poetry ◽  
Progressive Politics ◽  
The World ◽  
Relationship Of ◽  
The Relationship ◽  
Insight Into

This essay examines a polemic between two Baudelaire critics of the 1930s, Jean Cassou and Benjamin Fondane, which centered on the relationship of poetry to progressive politics and metaphysics. I argue that a return to Baudelaire's poetry can yield insight into what seems like an impasse in Cassou and Fondane. Baudelaire provides the possibility of realigning metaphysics and politics so that poetry has the potential to become the space in which we can begin to think the two of them together, as opposed to seeing them in unresolvable tension. Or rather, the tension that Baudelaire animates between the two allows us a new way of thinking about the role of esthetics in moments of political crisis. We can in some ways see Baudelaire as responding, avant la lettre, to two of his early twentieth-century readers who correctly perceived his work as the space that breathes a new urgency into the questions of how modern poetry relates to the world from which it springs and in which it intervenes.

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