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Artykuły w czasopismach na temat „Geometry and type of section”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Sowmiya, K.R. "Behaviour of Welded Connections in Square and Circular Hollow Sections." International Journal of Advances In Scientific Research and Engineering (IJASRE) 3, no. 4 (2017): 125–35. https://doi.org/10.5281/zenodo.583836.

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<em>Hollow Structural Section (HSS) members are known to possess many advantages over equivalent open sections, including better resistance to torsion as well as tension and compression loading, aesthetic appearance and economy in terms of material cost. Connections between HSS members could be made simple by cutting the ends and welding together. However, depending on joint configuration and number of members connected, this may result in complex and expensive connections. This paper presents the results of an analytical investigation done in ANSYS Software. Special attention was paid to T-jo

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2

Treagus, J. E. "The Loch Tay Fault: type section geometry and kinematics." Scottish Journal of Geology 39, no. 2 (2003): 135–44. http://dx.doi.org/10.1144/sjg39020135.

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Boykov, A. A. "BUILDING MODELS OF DYNAMIC CANAL SURFACES VIA GEOMETRY CONSTRUCTIONS LANGUAGE." Vestnik komp'iuternykh i informatsionnykh tekhnologii, no. 220 (October 2022): 15–29. http://dx.doi.org/10.14489/vkit.2022.10.pp.015-029.

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Building computer models of dynamic canal surfaces is a special case when implemented in CAD-systems since existing methods of surface modeling of such type are concentrated mostly on obtaining analytical expressions such as equations for the surface itself or its sections. The article introduces a constructive method of building models based on plane and spatial geometric constructions. The paper provides the analysis of given surface parameters, constructive algorithms for setting up a geometric correspondence between the graph of the cross-sectional area and the directrix, constructing of c

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4

Paul, Makesh A., and S. Arivalagan. "Case Study of Element Types on Cold Formed Steel Angle Sections Under Tensile Using Ansys." International Journal of Trend in Scientific Research and Development 3, no. 1 (2018): 792–96. https://doi.org/10.31142/ijtsrd19078.

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The effective sectional area concept was adopted to conduct the analysis of cold formed tension members. Ansys software was utilized to simulate the behavior of cold formed steel angle under tension load. Structural steel members are extensively used in structures such as bridges, roof trusses, transmission line towers, multistoried buildings etc. It gives high strength to weight ratio, resulting in the reduction of dead weight. The paper describes the case study of element types on cold formed steel angle sections under tensile using ansys. ANSYS Workbench capabilities include a unique and ex

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5

Ábel, József. "Analysis of the mathematical correlation between post-sharped hob and worm gear tooth surface." Multidiszciplináris tudományok 11, no. 4 (2021): 278–86. http://dx.doi.org/10.35925/j.multi.2021.4.32.

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The production geometry development of the worm gear drives with circle arched profile in axial section requires the combined management of complex mathematical, geometric and manufacturing knowledge. In this paper has been presented an analysis of the relation between the post-sharpening of the cylindrical hob with circle arched profile in axial section and gear tooth surface error according to the functions determined by previous research work, that fits to the Dudás type ProMAT general mathematical model, which is suitable for the analysis of technological processes in manufacturing. During

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6

Nakamura, Yasuharu, and Katsuya Hirata. "Critical geometry of oscillating bluff bodies." Journal of Fluid Mechanics 208 (November 1989): 375–93. http://dx.doi.org/10.1017/s0022112089002879.

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Measurements are presented of the mean pressures around rectangular and D-section cylinders, with a flat front face normal to the flow, forced to oscillate transversely at an amplitude of 10% of the length of the front face. The ratio of depth (streamwise dimension) to height (cross-stream dimension) of the cross-section ranges from 0.2 to 1.0 for rectangular cylinders and from 0.5 to 1.5 for D-section cylinders. The range of reduced velocities investigated, 3 to 11, includes the vortex-resonance region. When increasing the depth, an oscillating bluff cylinder shows a critical depth where base

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7

Конишев, Д. С. "ІНТЕГРОВАНЕ ПРОЄКТУВАННЯ ХВОСТОВОЇ ЧАСТИНИ ФЮЗЕЛЯЖУ ЛІТАКІВ ТРАНСПОРТНОЇ КАТЕГОРІЇ". Open Information and Computer Integrated Technologies, № 101 (9 грудня 2024): 4–21. https://doi.org/10.32620/oikit.2024.101.01.

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For the first time, when designing transport category aircraft with a tail cargo hatch, a method of integrated design and construction of the fuselage tail section has been developed and presented, which, using mathematically described parameters, allows the creation of a particular master geometry of the fuselage tail section for a specifically selected cargo door scheme. The method has been improved to allow the design of transport aircraft not only at the stage of creating a fundamentally new aircraft concept, but also as a means of modifying an existing passenger aircraft type through deep

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8

Marotta, Vincenzo Emilio, and Richard J. Szabo. "Algebroids, AKSZ Constructions and Doubled Geometry." Complex Manifolds 8, no. 1 (2021): 354–402. http://dx.doi.org/10.1515/coma-2020-0125.

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Abstract We give a self-contained survey of some approaches aimed at a global description of the geometry underlying double field theory. After reviewing the geometry of Courant algebroids and their incarnations in the AKSZ construction, we develop the theory of metric algebroids including their graded geometry. We use metric algebroids to give a global description of doubled geometry, incorporating the section constraint, as well as an AKSZ-type construction of topological doubled sigma-models. When these notions are combined with ingredients of para-Hermitian geometry, we demonstrate how the

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9

Mus’ifah, Iflatul, and Raekha Azka. "Etnomatematika: Eksplorasi Geometri pada Tradisi Meron di Sukolilo Kabupaten Pati." Circle: Jurnal Pendidikan Matematika 4, no. 2 (2024): 148–58. https://doi.org/10.28918/circle.v4i2.7398.

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Mathematics learning can be realized by collaborating with the culture found in the community. The meron tradition is one of the cultures in Sukolilo Pati with a religious theme aimed at commemorating the birthday of the Prophet Muhammad. This study aims to explore more deeply the geometry of the meron tradition in Sukolilo. The research method used in this study is a qualitative method with an ethnographic approach. This type of research is explorative research. The data analysis techniques used in the research are data reduction, data presentation (data display), and drawing conclusions. The

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10

Volkova, V., and V. Kovrova. "THE IMPACT OF CHANGING THE TYPE OF CROSS-SECTION OF COLUMNS OF FRAME BUILDINGS." Modern construction and architecture, no. 10 (December 30, 2024): 17–26. https://doi.org/10.31650/2786-6696-2024-10-17-26.

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Nowadays, the construction of multi-storey buildings is becoming increasingly important, leading to an increasing building density and the development of transport infrastructure. Recently, the volume of construction in areas exposed to vibrations of various nature has been steadily increasing. Constant impact of vibrations caused by external factors, such as traffic flows or industrial plants, on buildings can cause significant displacements of structural elements and increase noise levels, which is an additional negative effect on the safe operation of the building. Thus, the problem of cont

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11

Abdulsalam Mustafa, Sumayah, Mohd Zulham Affandi bin Mohd Zahid, and Md Hadli bin Abu Hassan. "Cross Section Optimization of Plane Truss among Different Spans." Applied Mechanics and Materials 679 (October 2014): 1–5. http://dx.doi.org/10.4028/www.scientific.net/amm.679.1.

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Cross sectional areas optimization is to be implemented to study the influence of the cross section shape on the optimum truss weight. By the aid of analysis and design engines with advanced finite element analysis that is the steel design software STAAD. Four rolled steel sections (angle, tube, channel, and pipe) which are used in industrial roof trusses are applied for comparison. Many previous studies, use the areas of cross sections as design variables without highlight to the shape of cross section at the start of the process, consequently the result area will be adequate if the designer

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12

Kirkin, Andrey M., Anton V. Kuryndin, Sergey V. Sinegribov, Arsenii O. Smirnov, and Valerii M. Khlobystov. "The Problem of Modeling the Geometry of Twisted Fuel Rods with X-Type Cross Section in the Performance of Thermohydraulic Calculations." Global Nuclear Safety, no. 1 (February 21, 2023): 23–35. http://dx.doi.org/10.26583/gns-2023-01-03.

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For creating computational models of processes affecting the safety of nuclear facilities, in accordance with the federal rules and regulations in the field of atomic energy use, the selected modeling methods, as well as the accepted approximations and assumptions shall be justified. The paper considers the issues of taking into account the specifics of modeling the geometry of twisted fuel rods with x-type cross section using nodalization software, as well as possible approaches to describing the geometry of such fuel rods during thermohydraulic calculations. The paper defines a preferred met

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13

De Cataldo, M. A., and M. Palleschi. "A note on threefolds with a hyperplane section of general type." Geometriae Dedicata 61, no. 2 (1996): 169–79. http://dx.doi.org/10.1007/bf00151581.

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14

Vázquez, Carlos Renato, and Alejandro Guajardo-Cuéllar. "Prediction of Vertical Vibrations of a CNC Router Type Geometry." Applied Sciences 14, no. 2 (2024): 621. http://dx.doi.org/10.3390/app14020621.

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Mechanical vibrations represent an important problem in machining processes performed by machine tools. They affect surface quality, tool life, and productivity. In extreme situations, chattering may appear, which can dramatically reduce the tool life. CNC router machines are particularly sensitive to vibrations, with their structure bearing resemblance to a composition of beams that are uniform in cross-section. These CNC machines are commonly used for different tasks, like engraving, cutting, and 3D printing. This work proposes a modeling methodology for vibration systems that consist of cou

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15

ZIBRAT, ZACHARY H., and ANDREW J. SZERI. "SADDLE-TYPE TORUS BRAIDS IN QUASIPERIODICALLY DRIVEN SYSTEMS: CROSSOVER MAPS OF TRANSVERSALLY INTERSECTING MANIFOLDS." International Journal of Bifurcation and Chaos 18, no. 10 (2008): 3001–12. http://dx.doi.org/10.1142/s0218127408022214.

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In [Spears et al., 2005] it was demonstrated that insight into the geometry and topology of attractors for nonlinear oscillators driven by n incommensurate frequencies may be obtained from the study of n Poincaré maps defined on global cross-sections. The attractors take the form of stable torus braids. Here, attention is focused on saddle-type torus braids in similar systems. Transverse intersections of stable and unstable manifolds are computed using the phase slice method, along with the application of the crossover map. This neatly maps from one global Poincaré section to another. As such,

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16

Shahriari, D., J. Jodaki, V. Jandaghi Shahi, and J. Darban Falak. "Development of an Expert Engineering Module for Determination of Ultrasonic Probe Position on the Weld Joint of Plate." Advanced Materials Research 83-86 (December 2009): 1306–14. http://dx.doi.org/10.4028/www.scientific.net/amr.83-86.1306.

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Ultrasound based inspection techniques are used extensively throughout industry for detection of flaws in engineering materials. The range and variety of imperfections encountered is large and critical assessment of location, size, orientation and type is often difficult. The research presented in this paper has resulted in a knowledge-based engineering module, which was developed software for determining ultrasonic probe location precisely and detecting of the welded sections completely. The criteria for diagnosing these positions, which have been classified into different groups, included in

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17

Hu, Sen, and Zhi Hu. "On geometry of the (generalized) G2-manifolds." International Journal of Modern Physics A 30, no. 20 (2015): 1550112. http://dx.doi.org/10.1142/s0217751x15501122.

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In this paper, we first understand the classical [Formula: see text]-structure and [Formula: see text]-geometry from the viewpoint of spinor, which is a more familiar framework for physicists. Explicit construction of invariant spinor is given via the Dirac gamma matrices. We introduce a notion of multispinor bundle associated with invariant spinor and differential operator on the section of this bundle. Then we study the vector fields satisfy some additional properties on [Formula: see text]-manifold, more precisely, we prove some no-go theorems corresponding to the vector field preserving th

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18

Ajiboye, J. S., and S. T. Oyinbo. "Load Prediction for the Extrusion from Circular Billet to Symmetric and Asymmetric Polygons Using Linearly Converging Die Profiles." Key Engineering Materials 622-623 (September 2014): 119–28. http://dx.doi.org/10.4028/www.scientific.net/kem.622-623.119.

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The deformation load is the most important parameter in the press design as it affects the structure and the general integrity of the final product. Therefore, every other parameter such as die shape, friction, type of process (hot or cold), and speed considered in modeling is optimized to cut back on the metal forming load. The flow of metal is largely influenced by the geometry of the die and hence the geometric shape of the tools is the main factor by which an optimum load can be evaluated. In extrusion process the strain distribution, resulting from deformation load, and other important va

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19

Carroll, William M. "Cross Sections of Clay Solids." Arithmetic Teacher 35, no. 7 (1988): 6–11. http://dx.doi.org/10.5951/at.35.7.0006.

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This geometry exercise for intermediate and junior high school tudents has three goals for students: (1) to create three-dimensional clay figures; (2) to think in three dimension; and (3) to develop vocabulary. Working individually from pictures, students first construct geometric solids out of clay. Second, they attempt to visualize what happens when a solid is sliced at a particular location and angle. The type of solid and how it is sliced will determine the plane figure that will result—trapezoid, ellipse, and so on (see fig. 1). Third, students develop a geometry vocabulary by naming the

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20

Chen, Jungkai A., and Meng Chen. "Explicit birational geometry of 3-folds and 4-folds of general type, III." Compositio Mathematica 151, no. 6 (2014): 1041–82. http://dx.doi.org/10.1112/s0010437x14007817.

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Nonsingular projective 3-folds $V$ of general type can be naturally classified into 18 families according to the pluricanonical section index${\it\delta}(V):=\text{min}\{m\mid P_{m}\geqslant 2\}$ since $1\leqslant {\it\delta}(V)\leqslant 18$ due to our previous series (I, II). Based on our further classification to 3-folds with ${\it\delta}(V)\geqslant 13$ and an intensive geometrical investigation to those with ${\it\delta}(V)\leqslant 12$, we prove that $\text{Vol}(V)\geqslant \frac{1}{1680}$ and that the pluricanonical map ${\rm\Phi}_{m}$ is birational for all $m\geqslant 61$, which greatly

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21

Izumiya, Shyuichi, and Farid Tari. "Projections of surfaces in the hyperbolic space along horocycles." Proceedings of the Royal Society of Edinburgh: Section A Mathematics 140, no. 2 (2010): 399–418. http://dx.doi.org/10.1017/s0308210509000213.

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We study orthogonal projections of embedded surfaces M in H3+ (−1) along horocycles to planes. The singularities of the projections capture the extrinsic geometry of M related to the lightcone Gauss map. We give geometric characterizations of these singularities and prove a Koenderink-type theorem that relates the hyperbolic curvature of the surface to the curvature of the profile and of the normal section of the surface. We also prove duality results concerning the bifurcation set of the family of projections.

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22

Wiley, Sean, and Huei-Ping Huang. "The Effect of Bifurcated Geometry on the Diodicity of Tesla Valves." Fluids 9, no. 12 (2024): 294. https://doi.org/10.3390/fluids9120294.

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The Tesla valve is a fluidic diode that enables unidirectional flow while impeding the reverse flow without the assistance of any moving parts. Conventional Tesla valves share a distinctive feature of a bifurcated section that connects the inlet and outlet. This study uses computational fluid dynamic (CFD) simulations to analyze the importance of the bifurcated design to the efficiency of the Tesla valve, quantified by diodicity. Simulations over the range of the Reynolds number, Re = 50–2000, are performed for three designs: the T45-R, D-valve, and GMF valve, each with two versions with and w

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Mallipaddi, Venkata, and Michael Anderson. "Evaluating Safety of Type-A Weaving Sections Using Geometric and Traffic Operational Factors." International Journal of Statistics and Probability 9, no. 6 (2020): 21. http://dx.doi.org/10.5539/ijsp.v9n6p21.

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The efficiency and safety of type-A freeway weaving sections in urban areas are constrained by recurrent bottlenecks. Limited space in freeway weaving sections cause traffic congestion and crashes during peak-hours. Various factors, including length of weaving section, continuity of lanes, and number of lanes will have significant effects on the level of service and safety performance of the weaving sections. Eight years (2010-2017) of crash data in the type-A weaving sections was used in this analysis. The objective of this study aims to evaluate geometric design factors and operational facto

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24

Ye, Gangfeng, Kelvin Shi, Robert Burke, Joan M. Redwing, and Suzanne E. Mohney. "Ti/Al Ohmic Contacts to n-Type GaN Nanowires." Journal of Nanomaterials 2011 (2011): 1–6. http://dx.doi.org/10.1155/2011/876287.

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Titanium/aluminum ohmic contacts to tapered n-type GaN nanowires with triangular cross-sections were studied. To extract the specific contact resistance, the commonly used transmission line model was adapted to the particular nanowire geometry. The most Al-rich composition of the contact provided a low specific contact resistance (mid10−8 Ωcm2) upon annealing at 600 °Cfor 15 s, but it exhibited poor thermal stability due to oxidation of excess elemental Al remaining after annealing, as revealed by transmission electron microscopy. On the other hand, less Al-rich contacts required higher anneal

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Yerkisheva, Zh, and D. Yerboluly. "Formation of students' mental activity by improving the applied focus of learning a geometric." Q A Iasaýı atyndaǵy Halyqaralyq qazaq-túrіk ýnıversıtetіnіń habarlary (fızıka matematıka ınformatıka serııasy) 24, no. 1 (2023): 28–41. http://dx.doi.org/10.47526/2023-1/2524-0080.03.

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Prerequisites for the study the problems of implementing the applied direction of teaching the topic of geometric construction in the geometry course of secondary school are most relevant, since there are no clear basic methods for the formation of students' thinking activities in this direction. This article discusses the results of a scientific study aimed at obtaining theoretical knowledge in any section of school geometry, which aims to give the student the skills to use the means of drawing the properties of geometric shapes and relationships. For this purpose, students were given a revie

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26

Pedrero, J. I., A. Fuentes, and M. Estrems. "Approximate Method for the Determination of the Bending Strength Geometry Factor for External Spur and Helical Gear Teeth." Journal of Mechanical Design 122, no. 3 (1999): 331–36. http://dx.doi.org/10.1115/1.1287508.

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The methods currently available for the determination of the AGMA J-factor require iterative procedures in order to compute the value of the critical section parameter, which is necessary to compute the tooth thickness at the critical section and the height of the Lewis parabola. This paper presents an approximate, non-iterative method for the determination of the AGMA J-factor for involute, external gear teeth, which is based on the approximate determination of the critical section. The method is valid for any tool geometry, including rack-type or pinion-type generation, and considers tool of

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27

Syifa Fauziah Rahmani, Nanda, Sugianto Sugianto, and Deden Masruri. "Airflow Velocity Measurement Of Turbular Test Section Based On Rpm Setting Configuration In Open Circuit Subsonic Wind Tunnel." Journal of Applied Mechanical Engineering and Renewable Energy 4, no. 2 (2024): 46–54. https://doi.org/10.52158/jamere.v4i2.914.

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Speed measurements in the test section based on the RPM setting configuration of the open-type subsonic wind tunnel with a turbular test section to obtain the properties of the airflow in the test section based on the RPM setting configuration in the open-type subsonic wind tunnel. The simulation process is carried out using software Computational Fluid Dynamics (CFD) , ANSYS Fluent. The simulation process is carried out by the method Moving Reference Frame (MRF) that the fluid phenomenon is moved to move the fan in the wind tunnel to obtain airflow properties in the turbular test section, ope

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Seyed, Ali Mousavi Davoudi, and Naghipour Morteza. "Studying the Buckling Behavior of Composite Columns (CFST) by Cyclic Loading." Journal of Civil Engineering and Materials Application 3, no. 4 (2019): 203–13. https://doi.org/10.22034/JCEMA.2019.101787.

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One of the most sensitive decisions a structural designer should consider is choosing the type of consumables in the structure. This decision is in many cases dependent on the type of structure, financial issues also the experience and skill of the designer. The main aim pursued in the design is to obtain highly secure, economical structures. Concrete and steel are materials that are widely used in construction. The benefits of both materials are well known today. The clever combination of these two materials, an effective explosion-proof system, will have the effect of exploding explosions in

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Junior, N. Brambatti, M. Walber, and A. D. de Meira Junior. "Initial Geometric Imperfections: A Robust, Closed-Section Cold-Formed Box Profile Application Subject to Local Buckling." International Journal of Applied Mechanics and Engineering 26, no. 1 (2021): 18–44. http://dx.doi.org/10.2478/ijame-2021-0002.

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Abstract Initial geometric imperfections are important for simulating local buckling in numerical models. References are found in the technical literature regarding open-section cold formed profiles. This work presents new procedures applied to a robust and closed-section cold formed profile subject to local buckling, and the use of procedures described in the technical literature already successfully used for open section profiles. The difference of this work in relation to the research already carried out is in the type of profile studied, in the mode of failure of the same and in the form o

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Kozono, Tomofumi, Hidemi Ishibashi, Satoshi Okumura, and Takahiro Miwa. "Conduit Flow Dynamics During the 1986 Sub-Plinian Eruption at Izu-Oshima Volcano." Journal of Disaster Research 17, no. 5 (2022): 754–67. http://dx.doi.org/10.20965/jdr.2022.p0754.

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We investigated conduit flow dynamics during the 1986 sub-Plinian eruption of Izu-Oshima volcano, Japan, using a 1-D steady conduit flow model. Following observations that the magma plumbing system beneath Izu-Oshima, characterized by the feeding of a dyke, generated a fissure-type sub-Plinian eruption, we considered a dyke-like conduit geometry by applying a pseudo-dyke conduit with an ellipsoidal horizontal cross-section. Under appropriate parameter settings constrained by geological, petrological, and geophysical observations, we identified a conduit geometry that enables steady solutions o

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Yan, Dong, Yong Jun Kang, Dan Zhang, and Shao Peng Ma. "Experimental Study on the Process of the Three-Dimensional Rock Crack Growth Influenced by the Pre-Crack Profile Geometry." Applied Mechanics and Materials 109 (October 2011): 165–69. http://dx.doi.org/10.4028/www.scientific.net/amm.109.165.

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The difference of the pre-crack profile geometry could have a certain influence on the surface crack growth in rock materials. In this paper, an experimental study on the failure process of rock specimen with a non-penetrated crack in two different profiles is performed. Profile of the pre-crack on the specimen type I is trapezoidal and profile of the pre-crack on the specimen type II is arc. The surface crack growth of the two types of specimen is analyzed and compared in detail by using the digital speckle correlation measurement (DSCM) techniques and the virtual extensometer (VE) based on D

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Zhang, Z. Y., and X. W. Luo. "Numerical investigation on cavitation performance for centrifugal pumps with different impeller inlet geometry." Journal of Physics: Conference Series 2707, no. 1 (2024): 012045. http://dx.doi.org/10.1088/1742-6596/2707/1/012045.

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Abstract In the centrifugal pump, cavitation often leads to the noise and pressure pulsation, further affects the performance and operation of the pump. Therefore, it is essential to improve cavitation performance at the stage of pump design. In this paper, three centrifugal pump impellers are designed by using different inlet geometry, where one is the conventional type and has cross section diffusion of flow passage along flow direction, and other two impellers are proposed and have cross section contraction of flow passage from impeller inlet to exit. For comparison of cavitation performanc

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Freitas, Arlene M. S., Marcílio S. R. Freitas, Flávio T. Souza, Guilherme G. Silva, and Vinícius O. Faria. "Theoretical and experimental analysis of perforated rack columns." Rem: Revista Escola de Minas 66, no. 3 (2013): 289–94. http://dx.doi.org/10.1590/s0370-44672013000300004.

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Industrial Storage Systems are usually built with cold-formed profiles, and their sections, called "rack section", are specially designed to make its assemblage easier, having perforations throughout their elements to fit connections. This section geometry with holes induces unexpected behavior in other sections. The analysis of these columns is quite complex, and is usually done by computational methods. The main objective is to develop a finite element model to determine the buckling load and mode failure in cold-formed perforated columns. This analysis is carried out using commercial ANSYS

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Muzzulini, Daniel. "The Geometry of Musical Logarithms." Acta Musicologica 87, no. 2 (2015): 193–216. https://doi.org/10.5281/zenodo.5541790.

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The aim of this essay is to create a geometrical link between the music theory and the mathematics of the early seventeenth century by studying and comparing diagrams which directly or indirectly refer to mathematical logarithms. The focus is on the relationships between ratios of numbers referring to sounds and related concepts of perception. The relationship between frequency and pitch is a paradigmatic case of theWeber-Fechner law of psychophysics, stating that equal frequency ratios are perceived as equally sized musical intervals. The Weber-Fechner law maintains that many perceptual pheno

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Ampangallo, Bastian A., Herman Parung, Rita Irmawaty, and Arwin Amiruddin. "Effective Stiffness and Damping Analysis of Steel Damper to Lateral Cyclic Loading." Civil Engineering Journal 10, no. 7 (2024): 2344–56. http://dx.doi.org/10.28991/cej-2024-010-07-017.

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Steel dampers are components used in building structures to reduce vibration and energy generated by dynamic loads such as earthquakes. Several factors affect the effectiveness of steel dampers in reducing energy, including the cross-sectional area, mass distribution, cross-sectional geometry, and material stiffness. The cross-sectional geometry or shape of the steel damper can affect how energy is absorbed and dissipated in the structural system. Cross sections with different geometric variations can have different mechanical responses to dynamic loads. This study aims to analyze which type o

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Klyukin, D. A. "Computer Modeling and Structuraland Parametric Optimization of the Artillery Gun Barrel with Non-circular Cross Section." Intellekt. Sist. Proizv. 23, no. 1 (2025): 73–81. https://doi.org/10.22213/2410-9304-2025-1-73-81.

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The article presents the results of modeling longitudinal and transverse vibrations of the artillery gunbarrel with a non-circular cross section being loaded with internal pressure and thermal effects of powder gases. The barrel shape was taken into account by means of the inertia moments of the barrel cross sections and internal forces. An algorithm for structural and parametric optimization of the barrel geometry has been developed. The external barrel diameters, the cutoutdiameters and the distances from the center of the cross section to the center of the cutout in key cross sections are s

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Dragoni, E. "Fatigue Testing of Metric Bolts Fitted With Lip-Type Nuts." Journal of Offshore Mechanics and Arctic Engineering 117, no. 3 (1995): 200–204. http://dx.doi.org/10.1115/1.2827090.

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The paper addresses the effect of the external shape of lip-type nuts on the fatigue strength of commercial M10 bolts loaded in tension. Evolving from the standard configuration, six nut geometries are compared, characterized by lips of different shape (cylindrical or tapered) and length. Testing and statistical treatment of the data are performed in accordance with a JSME standard involving 14 specimens for each geometry. Within the class of merely cylindrical lips, only limited advantages over the standard assembly are detected. In particular, the bolt strength remains mostly unaffected by l

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BERNAD, ELENA S., SANDOR I. BERNAD, IZABELLA SARGAN, and MARIUS L. CRAINA. "SAPHENOUS VEIN GRAFT PATENCY AFTER GEOMETRY REMODELING." Journal of Mechanics in Medicine and Biology 15, no. 06 (2015): 1540051. http://dx.doi.org/10.1142/s0219519415400515.

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Tortuous saphenous vein graft (SVG) hemodynamics was investigated using computational fluid dynamics (CFD) techniques. Computed tomography (CT) technology is used for noninvasive bypass graft assessment seven days after surgery. CT investigation shows two regions with severe shape remodeling, one is an angle type contortion and the other one is a sharp curvature with tortuous area reduction. The numerical analysis carefully examines the effect of an SVG geometry remodeling through flow separation, particle deposition, and wall shear stress (WSS). During the cardiac cycle, overall pressure drop

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Das, JN, A. Dey, and K. Chakrabarti. "Schwinger Variational Calculation for Ionisation of Hydrogen Atoms by Electrons." Australian Journal of Physics 47, no. 6 (1994): 751. http://dx.doi.org/10.1071/ph940751.

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The Schwinger variational principle has been used to calculate the triple differential cross section for ionisation of hydrogen atoms by electrons at intermediate and high energies for Ehrhardt-type asymmetric geometry. The results are somewhat better in the recoil peak regions compared with those of the second Born and other similarly successful calcula

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Aleyaasin, Majid. "Protective and Blast Resistive Design of Posttensioned Box Girders Using Computational Geometry." Advances in Civil Engineering 2018 (2018): 1–7. http://dx.doi.org/10.1155/2018/4932987.

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The optimal tendon profile and its associated duct geometry for posttensioned box girders are investigated. A computational algorithm has been developed to determine an ideal shape for the tendon and duct. The algorithm is based on a diagonal cross point in the Magnel quadrilateral and uses computational geometry instead of graphical drawing. Thereafter, an ideal parabolic and linear tendon profiles can be calculated from which the covering duct could be shaped. To check the optimality of the results, an automatic examination of Magnel diagrams in various cross sections is incorporated in the

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Eremin, V. I. "Effect of sample cross-section geometry and loading type on low temperature unstable plastic deformation." Scripta Metallurgica et Materialia 25, no. 10 (1991): 2215–19. http://dx.doi.org/10.1016/0956-716x(91)90003-j.

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Parvanova, Irena, and Vencislav Radulov. "The Method of Auxiliary Parallel Planes when Studying the Type of Sections of a Torus with a Plane." Mathematics and Informatics 67, no. 6 (2024): 628–39. https://doi.org/10.53656/math2024-6-4-the.

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The article discusses the study and determination of the type of curves that result from the intersection of a torus with a plane using the methods and tools used in descriptive geometry. The method used is a universal method in descriptive geometry – method of auxiliary parallel planes.

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Adjamskiy, S. V., R. V. Podolskyi, G. A. Kononenko, E. S. Klemeshov, and O. A. Safronova. "Development of rational heat treatment regimes to reduce residual stresses in parts of complex cross-section made of 316L steel using SLM technology." Fundamental and applied problems of ferrous metallurgy, no. 38 (2024): 501–16. https://doi.org/10.52150/2522-9117-2024-38-501-516.

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Residual internal stresses are one of the features of metallic materials manufactured by layer-by-layer fusion using SLM technology, but they can significantly affect mechanical properties and geometric parameters, therefore, it is necessary to take measures to reduce residual stresses. According to the results of analytical studies, it was found that the most effective way to reduce residual stresses is heat treatment. Purpose of the study. To investigate the influence of heat treatment under different regimes on the change in internal stresses of the first kind using calculations and direct

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Golzari, Elaheh, and Péter Rabb. "Revisiting the Geometry of the Transition Zone Using Filposh Squinches in Ardeshir Palace." Építés - Építészettudomány 50, no. 3-4 (2022): 351–64. http://dx.doi.org/10.1556/096.2022.00079.

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Iranians invented squinches to cover a square-plan space with a dome. Filposh, a type of squinch first found in Sasanian architecture, is a conical vault constructed in the transition zone’s corners to transmit the dome’s forces and weight. This technique can be seen in three halls of the Sasanian palace of Ardeshir. In this paper, the geometry of the transition zone using filposh squinches between a spherical dome and the square supporting walls in Ardeshir Palace was re-examined. A historical descriptive method was employed to analyse the main drawings of the halls from the nineteenth centur

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Guntur Indra Prahasta, Yuliadi, and Elfida Moralista. "Redesign Geometri Lereng Penambangan Batugamping Kuari C di PT X Kecamatan Palimanan Kabupaten Cirebon Provinsi Jawa Barat." Jurnal Riset Teknik Pertambangan 1, no. 1 (2021): 30–38. http://dx.doi.org/10.29313/jrtp.v1i1.30.

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Abstract. PT X is a cement producer which has a limestone mine in Palimanan District, Cirebon Regency, West Java Province. In the Quarry C limestone mining area there has been an landslide that has resulted in the inoperation of mining activities in the area. This research was conducted on the slopes of the Quarry C mine which had experienced a landslide. This study aims to determine the causes of landslides that occur, determine the value of cohesion, deep friction angles and safety factors when landslides occur, and recommend safe slope geometry with the input parameters results of back anal

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Gnitetska, Tetjana, Galyna Gnitetska, and Dmitriy Motulyov. "APPLICATION OF PARAMETRIZATION OF CHARACTERISTIC CROSS SECTIONS OF OBJECTS FOR INDIRECT PARAMETRIZATION OF THEIR 3D MODELS IN AUTOCAD CAD." APPLIED GEOMETRY AND ENGINEERING GRAPHICS, no. 100 (May 24, 2021): 99–107. http://dx.doi.org/10.32347/0131-579x.2021.100.99-107.

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The developed algorithm of indirect parametrization of 3d model of a typical part by means of parametrization of its longitudinal section is presented in the work. Controlling the shape of 3d objects by parameterizing their 2d cross-sections allows, using AutoCAD CAD, to create variants of electronic models of parts, the same type in geometry and different in size characteristics. This saves resources that are spent on design work. The proposed algorithm for creating parameterized 3d models in the CAD environment AutoCAD can be used in engineering practice. Currently, methodological developmen

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Mu, Jing, Yi Bo Du, Rui Li, Jie Tian, and Miao Wu. "Study on the Section's Extreme Position of Roadheader's Cutting Arm in Coal Mine Laneway." Applied Mechanics and Materials 88-89 (August 2011): 5–9. http://dx.doi.org/10.4028/www.scientific.net/amm.88-89.5.

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Directional excavation technology in the coal mine laneway is the important research direction of integrated excavation project. This paper studies the changes of cutting section shape and boundary values caused by the swing of boom-type roadheader's cutting arm to calculate the maximum values of compensable pose deviation when cutting, as the research basis for the accuracy analysis of boom-type roadheader's directional excavation. This paper gives the calculation method of cutting arm control, spatial modeling and analysis of cutting head position changes caused by cutting arm in thought o

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Turan, Raziye Befru, and Ayşe Okur. "Variation of the yarn cross-section in fabric." Textile Research Journal 82, no. 7 (2012): 719–24. http://dx.doi.org/10.1177/0040517511435009.

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The aim of this study is to investigate the cross-sectional shape and size variation of the yarn in fabric depending on the structural parameters of fabric. For this reason, the dimensions of the yarns that are in the different regions of the weave unit have been determined by achieving the cross-sectional images of the fabrics, which were woven with different weave types and at different weft settings. The variation in the cross-section of the yarn has been evaluated by using the flattening ratio. Consequently, it has been observed that the structural factors which determine the geometry of t

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Tak, Sehyun, Sari Kim, Hwapyeong Yu, and Donghoun Lee. "Analysis of Relationship between Road Geometry and Automated Driving Safety for Automated Vehicle-Based Mobility Service." Sustainability 14, no. 4 (2022): 2336. http://dx.doi.org/10.3390/su14042336.

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Various mobility services have been proposed based on the integration of automated vehicle (AV) and road infrastructure. Service providers need to identify a set of road sections for ensuring the driving safety of an AV-based mobility service. The main objective of this research is to analyze the safety performance of AVs on the road geometrical features present during this type of mobility service. To achieve the research goal, a mobility service is classified by a combination of six road types, including expressway, bus rapid transit (BRT) lane, principal arterial road, minor arterial road,

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Joseph, Taïsha V., Signe Caksa, Madhusmita Misra, and Deborah M. Mitchell. "Hip Structural Analysis Reveals Impaired Hip Geometry in Girls With Type 1 Diabetes." Journal of Clinical Endocrinology & Metabolism 105, no. 12 (2020): e4848-e4856. http://dx.doi.org/10.1210/clinem/dgaa647.

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Abstract Context Among patients with type 1 diabetes (T1D), the risk of hip fracture is up to 6-fold greater than that of the general population. However, the cause of this skeletal fragility remains poorly understood. Objective To assess differences in hip geometry and imaging-based estimates of bone strength between youth with and without T1D using dual-energy x-ray absorptiometry (DXA)-based hip structural analysis. Design Cross-sectional comparison. Participants Girls ages 10 to 16 years, including n = 62 with T1D and n = 61 controls. Results The groups had similar age, bone age, pubertal

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