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Journal articles on the topic 'Axial section'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Khaleel, Nashwan I., Muna A. G. Zghair, and Qays A. Hassan. "Value of Combination of Standard Axial and Thin-Section Coronal Diffusion-weighted Imaging in Diagnosis of Acute Brainstem Infarction." Open Access Macedonian Journal of Medical Sciences 7, no. 14 (2019): 2287–91. http://dx.doi.org/10.3889/oamjms.2019.336.

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AIM: To determine the value of the combination of thin-section 3 mm ‎coronal and standard ‎axial DWI and their impact in facilitating the diagnosis of ‎‎acute brainstem infarction. METHODS: A cross-sectional study conducted from the 1st of April 2017 to the end of February 2018 on 100 consecutive patients (66% were male, and 34% were female) with isolated acute ischemic infarction in the ‎brainstem. The abnormal MRI findings concerning the ischemic lesions were interpreted on standard axial 5 mm and thin-section coronal 3mm DWI. RESULTS: The mean age of the studied group was 69.2 ±

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Foroughi, Saeid, and Süleyman Bahadır Yüksel. "Investigation of moment-curvature and effective section stiffness of reinforced concrete columns." Challenge Journal of Structural Mechanics 7, no. 3 (2021): 135. http://dx.doi.org/10.20528/cjsmec.2021.03.003.

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In determining the seismic performance of reinforced concrete (RC) structures in national and international seismic code, it is desired to use effective section stiffness of the cracked section in RC structural elements during the design phase. Although the effective stiffness of the cracked section is not constant, it depends on parameters such as the dimension of the cross-section, concrete strength and axial force acting on the section. In this study, RC column models with different axial load levels, concrete strength, longitudinal and transverse reinforcement ratios were designed to inves

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3

Savi´, D., A. Jašović, and D. Djerić. "The value of computerized tomography (CT) in the evaluation of the anatomic structure of the attic." Journal of Laryngology & Otology 101, no. 11 (1987): 1118–24. http://dx.doi.org/10.1017/s0022215100103354.

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AbstractBy the use of computerized tomography (CT) the authors have examined and precisely defined the radiological anatomical characteristics of the attic and its relation to other structures of the middle and inner ear. The identification of individual morphological structures has been made on axial, semi-axial and frontal CT sections. Each type of original CT section has been compared with the corresponding original anatomical section.

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Keintjem, Militia, Riza Suwondo, and Made Suangga. "Efficiency Assessment of Cruciform Steel Columns: Balancing Axial Capacity and Weight." Engineering, Technology & Applied Science Research 15, no. 2 (2025): 21342–47. https://doi.org/10.48084/etasr.10107.

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Cruciform steel columns, also known as king and queen cross sections, have gained attention in structural engineering for their ability to overcome the limitations of traditional I-sections and H-sections. These limitations include reduced stability due to slenderness effects and excessive material usage in tall columns. Designed to enhance axial load capacity while minimizing weight, cruciform sections offer a more efficient, cost-effective, and sustainable alternative for modern construction. This study assesses the efficiency of cruciform steel columns by comparing their design axial capaci

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Yin, Lingfeng, Tianyang Deng, Yu Niu, and Zhanjie Li. "Free-Form Shape Optimization of Advanced High-Strength Steel Members." Buildings 12, no. 12 (2022): 2101. http://dx.doi.org/10.3390/buildings12122101.

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The high yielding strength of advanced high-strength steel (AHSS) provides great opportunities for cold-formed steel (CFS) members with much higher load-carrying capability. However, if manufactured into the traditional cross-section shapes, such as C and Z, the material advantage cannot be fully exploited due to the cross-section instabilities. The purpose of this study was to establish a shape optimization method for cold-formed sections with AHSS and explore the potentially material efficiency that AHSS could provide to these sections in terms of their axial strength. In this study, the ins

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Li, Weiteng, Zijian Wang, Zhaoshun Jing, Yuanzhen Li, Yuchun Mei, and Chunqing Liu. "A Method for Calculating the Bearing Capacity of Basic Members of an Underground Concrete-Filled Steel Tube Supporting Arch with a D-Shaped Cross Section." Buildings 14, no. 12 (2024): 4014. https://doi.org/10.3390/buildings14124014.

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High-strength concrete-filled steel tube (CFST) arches have been widely applied in underground engineering, among which there are special-shaped arches such as D-shaped sections. At present, most studies have concentrated on members with square or circular sections, while relatively few studies have been conducted on D-shaped section members. In this study, firstly, D-shaped sections were initially transformed into sections with a part square and part elliptical shape using an equivalent section method. The formulas for the axial compression and pure bending bearing capacities of the basic D-s

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Connor, Steve, Kate Hulley, Christian Burd, Nikul Amin, and Irumee Pai. "Which is the optimally defined vestibular cross-section to diagnose unilateral Meniere’s disease with delayed post-gadolinium 3D fluid-attenuated inversion recovery MRI?" British Journal of Radiology 94, no. 1119 (2021): 20200996. http://dx.doi.org/10.1259/bjr.20200996.

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Objectives:Delayed post-gadolinium 3D fluid-attenuated inversion recovery (FLAIR) MRI is used to support a diagnosis of Ménière’s disease (MD) with the ratio of the endolymphatic space (ES) to the sum of the endolymphatic and perilymphatic spaces (SEPS) on a cross-section through the vestibule being a key diagnostic criterion. It was hypothesised that the exact definition of the vestibular cross-section would influence the ES: SEPS ratio, its ability to diagnose MD, and its reproducibility.Methods:Following institutional approval, 22 patients (five male, 17 female; mean age 52.1) with unilater

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Fang, Lin, Min Yang, and Chengming Li. "Equivalent uniaxial constitutive relationship for core concrete of cross-shaped RC short columns." Advances in Engineering Technology Research 6, no. 1 (2023): 459. http://dx.doi.org/10.56028/aetr.6.1.459.2023.

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Based on the experimental results of seven cross-shaped RC short columns subjected to axial load and reasonable assumptions, the core concrete in cross-shaped section was divided into several regions, the analytic derivation of the effective transverse confined pressure was provided, and the equivalent uniaxial constitutive relationship was constructed for core concrete of the divided regions. The load versus strain curves of the specimens were calculated by the proposed constitutive relationship. The calculated results agreed well with the experimental results. The effects of the tie spacing,

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9

Chattopadhyay, S. "Allowable Stresses for Nonrectangular Sections Under Combined Axial and Bending Loads." Journal of Pressure Vessel Technology 110, no. 2 (1988): 188–93. http://dx.doi.org/10.1115/1.3265585.

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The design stress allowables for various loading conditions involving bending in Section III, Division 1 and Section VIII, Division 2 of the ASME Boiler and Pressure Vessel Code are based on the assumption of a rectangular cross section of the structural members. These allowables do not necessarily provide the same level of safety for all general cross sections. In this work, stress allowables have been proposed for design, level C and test condition loadings to provide adequate safety for all combinations of axial and bending loads. The limits are based on an in-depth study of the interaction

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Mohamed Ali, Jaffar S., Kassim A. Abdullah, and Yulfian Aminanda. "Effect of Cross Sectional Shape on the Energy Absorbing Characteristics of a Tube under Quasi-Static Loading." Applied Mechanics and Materials 315 (April 2013): 334–38. http://dx.doi.org/10.4028/www.scientific.net/amm.315.334.

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In this study, numerical simulation of tubes of various cross section under axial compression is carried out using LS-DYNA. The effect of varying configurations of tube cross-section shape on the deformation response, collapse mode and energy absorption characteristics of tubes under quasi-static axial compression have been studied. The validation of the finite element tube model was made by comparison with the experimental results of the square tube subjected to quasi-static axial compression. Tabulated results are presented and plots have been included for the specific energy absorption for

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11

Hsu, Wei Hsun, Hsiao Chi Chung, and Wei Ting Hsu. "Analysis of the Effect of Slenderness Ratio on Axial Force in T-Section." Key Engineering Materials 986 (August 29, 2024): 111–17. http://dx.doi.org/10.4028/p-ttp4kg.

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This study extensively investigates T-shaped axial compression members with varying wing-flange width-to-thickness ratios, focusing primarily on the influence of section width-to-thickness ratio and effective width on the sectional resistance. Based on the AISC 2017 specifications, assuming the overall component is a stable member, the study analyzes the impact of varying the wing-flange width-to-thickness ratio on the sectional stability and resistance of the structure. Especially for slender sections that exceed the width-to-thickness ratio limits specified in AISC 2017, it is necessary to c

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Zhang, Junfeng, Bo Li, Anqi Li, and Shiyun Pang. "Critical Stress Determination of Local and Distortional Buckling of Lipped Angle Columns under Axial Compression." Buildings 12, no. 6 (2022): 712. http://dx.doi.org/10.3390/buildings12060712.

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In recent years, cold-formed steel has been widely used in prefabricated steel structures, and the common cross-section forms are mainly complex lipped angle sections. However, there is a lack of design guidance for such a cross-section due to the complex geometric property. The restraint between adjacent plates cannot be considered proper for the traditional analytical method. Therefore, it is particularly important to study the stability bearing capacity of angle sections with complex edges under axial compression. In this paper, the finite strip software (CUFSM5) was used to analyze the cri

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13

Chiêm, Đặng Tứ Quốc, та Hùng Cường Bùi. "Công thức xác định ứng suất ổn định cục bộ của thép tiết diện chữ I chịu nén đều". Vietnam Institute for Building Science and Technology 2024, vi.vol2 (2024): 32–39. http://dx.doi.org/10.59382/j-ibst.2024.vi.vol2-4.

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The I-shaped steel sections should be checked for local buckling conditions during design. When local buckling occurs, there is interaction between thin-walled components of the section. Design codes have provided formulas to determine local critical stress for I-shaped steel sections, but they do not account for this interaction. This paper proposes equations for determining the local ultimate stress of I-shaped sections under axial compression, considering web and flange interaction when ratios between the height and width of the section, the flange thickness and web thickness change. The lo

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Makki, Russul O., and Mohammed K. Fakhraldin. "Modeling and Analysis Variable Cross Section Pile Driven in Sandy Soil using Finite Element." E3S Web of Conferences 318 (2021): 01005. http://dx.doi.org/10.1051/e3sconf/202131801005.

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This study focuses on the finite element simulation of piles with different models in sandy soils using the software PLAXIS 3D V20. The parametric study has conducted to investigate the influence of multiple parameters on the axial capacity of steel piles in sandy soil, including the cross-section variables in two cases: open and close-ended piles. The typical circular and square cross-section open and close-ended piles were selected as the reference for comparison with variables cross-section piles. The open-ended tapered pile 3b showed an increase in the maximum load capacity about 210% more

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15

Jasim, Al Mashhadani D. A., Leong Sing Wong, Ahmed W. Al-Zand, and Sih Ying Kong. "Evaluating Axial Strength of Cold-formed C-Section Steel Columns Filled with Green High-performance Concrete." Civil Engineering Journal 10 (December 16, 2024): 271–90. https://doi.org/10.28991/cej-sp2024-010-014.

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Concrete-filled steel tube (CFST) columns that experience outward local buckling under high axial stress remain a significant concern, particularly when thin steel sections are used, as opposed to semi-compact and compact sections. This study investigated the performance of column systems by comparing single- and double-C-section configurations with both hollow and concrete-filled designs. Two types of infill materials were investigated: normal concrete and recycled material concrete, which included 10% waste glass powder as a cement replacement, 8% black high-density polyethylene beads as a s

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Grigusevičius, Andrius, and Gediminas Blaževičius. "NUMERICAL INVESTIGATION OF THE ELASTIC-PLASTIC LINEAR HARDENING STRESS-STRAIN STATE OF THE FRAME ELEMENT CROSS-SECTION." Engineering Structures and Technologies 8, no. 3 (2016): 94–100. http://dx.doi.org/10.3846/2029882x.2016.1217796.

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The aim of this paper is to present a solution algorithm for determining the frame element crosssection carrying capacity, defined by combined effect of bending moment and axial force. The distributions of stresses and strains inside a cross-section made of linearly hardening material are analysed. General nonlinear stress-strain dependencies are composed. All relations are formed for rectangular cross-section for all possible cases of combinations of axial force and bending moment. To this end, five different stress-strain states are investigated and four limit axial force values are defined

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17

Luo, Su, Xu, Ou, and Peng. "Axial Compression Performance of Post-Fire Concrete Columns Strengthened Using Thin-Walled Steel Tubes." Sustainability 11, no. 18 (2019): 4971. http://dx.doi.org/10.3390/su11184971.

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For concrete columns damaged by fire, a strengthen technique using thin-walled steel tubes is proposed. To investigate the axial compression capacity of post-fire concrete columns strengthened using thin-walled steel tubes, considering tube thickness, the strengthening method, and section geometry, 12 specimens were fabricated, of which two were control columns and 10 were exposed to fire in accordance with the ISO834 temperature curve. Subsequently, eight specimens were strengthened. Axial compression tests were conducted to provide a better understanding of the strengthening technique. The e

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18

Bodzás, S., and I. Dudás. "Comparative finite element method analysis of two spiroid worm gear drives having different profiles." International Review of Applied Sciences and Engineering 6, no. 1 (2015): 31–39. http://dx.doi.org/10.1556/1848.2015.6.1.5.

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With the knowledge of the advantageous characteristics of the cylindrical worm gear drives having arched profile in axial section and the conical worm gear drives having linear profile in axial section, a new geometric type conical worm gear drive has been designed and then manufactured, that is the conical worm gear drive having arched profile in axial section. Under same load and boundary conditions in case of the same geometric spiroid worm gear drives having arched profile and having linear profile in axial section we have done comparative finite element method analysis for evaluating the

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19

Hussein, Diyari B., and Ardalan B. Hussein. "Numerical Investigation of the Axial Load Capacity of Cold-Formed Steel Channel Sections: Effects of Eccentricity, Section Thickness, and Column Length." Infrastructures 9, no. 9 (2024): 142. http://dx.doi.org/10.3390/infrastructures9090142.

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Cold-formed steel channel (CFSC) sections have gained widespread adoption in building construction due to their advantageous properties, including superior energy efficiency, expedited construction timelines, environmental sustainability, material efficiency, and ease of transportation. This study presents a numerical investigation into the axial compressive behavior of CFSC section columns. A rigorously developed finite element model for CFSC sections was validated against existing experimental data from the literature. Upon validation, the model was employed for an extensive parametric analy

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20

Wang, Xiangyu, Yongtao Wu, Peng Jia, et al. "Orthogonal Experimental Design Based Nozzle Geometry Optimization for the Underwater Abrasive Water Jet." Machines 10, no. 12 (2022): 1243. http://dx.doi.org/10.3390/machines10121243.

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This paper proposes an orthogonal experimental design based on the optimization method for the nozzle geometry of an underwater abrasive water jet, with the objective of maximizing the cutting capacity and minimizing the nozzle-erosion rate. Parameter effects on the nozzle’s cutting capability and life are analyzed. This analysis shows that while the contraction-section curve, the contraction-section axial length and the focus-section axial length mainly affected the service life of the nozzle, the nozzle-outlet diameter mainly affected the cutting capacity of the nozzle. The effect significan

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Bodzás, Sándor, and Illés Dudás. "Comparative Finite Element Method Analysis of Spiroid Worm Gear Drives Having Arched Profile and Having Linear Profile in Axial Section." Technological Engineering 11, no. 1 (2014): 25–29. http://dx.doi.org/10.2478/teen-2014-0005.

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Abstract With the knowledge of the advantageous characteristics of the cylindrical worm gear drives having arched profile in axial section and the conical worm gear drives having linear profile in axial section, a new geometric type conical worm gear drive has been designed and then manufactured, that is the conical worm gear drive having arched profile in axial section. Beside similar charging and marginal conditions in case of the same geometric spiroid worm gear drives having arched profile and having linear profile in axial section we have done comparative finite element method analysis fo

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Xia, Hui, Yi Hua Dou, Xin He Wang, and Jiang Wen Xu. "Sectionalized Mechanical Models of Drilling Tool of Trenchless Directional Drilling." Applied Mechanics and Materials 268-270 (December 2012): 1190–93. http://dx.doi.org/10.4028/www.scientific.net/amm.268-270.1190.

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There are three working conditions namely drilling a guide hole, expanding the guide hole and pulling back pipeline in trenchless directional drilling. The position of drill string in the wellbore and loads exerted on the drill string varied in different working conditions. The models of buckling analysis of drill strings under compression, mechanical analysis of drill string under axial compression near drill bit in inclined straight section, mechanical analysis of drill string with multi-centralizers under axial compression near drill bit in inclined straight section, mechanical analysis of

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Mughnie, Hidayat, Budiman Budiman, Rachmad Irwanto, and Muhammad Taufiq Al Hafidz. "NUMERICAL STUDY ON BEHAVIOUR OF COLD-FORMED STEEL UNLIPPED CHANNEL SUBJECT TO AXIAL COMPRESSION." International Journal of Civil Engineering and Infrastructure 2, no. 2 (2023): 57. http://dx.doi.org/10.24853/ijcei.2.2.57-65.

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Innovation in obtaining construction materials that are efficient and applicable to various conditions is a challenge for researchers. Cold-formed steel is a material breakthrough in construction that has advantages over hot-rolled steel. Many studies have been carried out on Cold-formedsteel subjected to various loadings to examine the behavior and capacities of the sections. This study aims to investigate the behavior and section capacity of cold-formed steel unlipped channels due to axial compression loads. This research begins with conducting a literature study, then carrying out numerical

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Wang, Zhen Yu, Dai Yu Wang, and Da Gang Lu. "Behavior of Large-Scale Circular and Square RC Columns Confined with Carbon Fiber-Reinforced Polymer under Uniaxial Compression." Advanced Materials Research 163-167 (December 2010): 3686–93. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.3686.

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Most experimental studies concerning the stress-strain behavior of concrete columns confined with carbon fiber-reinforced polymer (CFRP) focused on plain concrete columns with small section. In this study, 34 concrete columns with large-scale circular and square cross section confined with CFRP were tested under axial compression to investigate the influence of sectional dimensions, internal steel reinforcement and thickness of CFRP jackets on the stress-strain behaviors. Test results indicated that the confinement of CFRP resulted in significant increase in axial stress and strain for circula

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Yu, Yang, Yi Hua Dou, Fu Xiang Zhang, and Xiang Tong Yang. "Analysis of Premium Connection of Connecting and Sealing Ability Loaded by Axial Tensile Loads." Applied Mechanics and Materials 268-270 (December 2012): 737–40. http://dx.doi.org/10.4028/www.scientific.net/amm.268-270.737.

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It is necessary to know the connecting and sealing ability of premium connection for appropriate choices of different working conditions. By finite element method, the finite element model of premium connection is established and the stresses of seal section, shoulder zone and thread surface of tubing by axial tensile loads are analyzed. The results show that shoulder zone is subject to most axial stresses at made-up state, which will make distribution of stresses on thread reasonable. With the increase of axial tensile loads, stresses of thread on both ends increase and on seal section and sh

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Lekhov, O. S., and A. V. Mikhalev. "Stress-strain state of metal in deformation zone during production of steel section billets on the unit of combined continuous casting and deformation. Report 2." Izvestiya. Ferrous Metallurgy 63, no. 9 (2020): 730–34. http://dx.doi.org/10.17073/0368-0797-2020-9-730-734.

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Stress state of metal in deformation zone during introduction of the separating collars of the grooved die into continuously casted steel slab was calculated for production of section billets on the unit of combined continuous casting and deformation. Calculation of axial, tangential and equivalent stresses arising in deformation zone of metal was made in four sections of deformation zone and its results are presented in specific points and lines. View of the section of deformation zone and location of specific points are provided. The stress state of metal in zone of cyclic deformation at for

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Hsu, Jia-Lien, Anandakumar Singaravelan, Chih-Yun Lai, et al. "Applying a Deep Learning Model for Total Kidney Volume Measurement in Autosomal Dominant Polycystic Kidney Disease." Bioengineering 11, no. 10 (2024): 963. http://dx.doi.org/10.3390/bioengineering11100963.

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Background: Autosomal dominant polycystic kidney disease (ADPKD) is the most common hereditary renal disease leading to end-stage renal disease. Total kidney volume (TKV) measurement has been considered as a surrogate in the evaluation of disease severity and prognostic predictor of ADPKD. However, the traditional manual measurement of TKV by medical professionals is labor-intensive, time-consuming, and human error prone. Materials and methods: In this investigation, we conducted TKV measurements utilizing magnetic resonance imaging (MRI) data. The dataset consisted of 30 patients with ADPKD a

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Rodríguez Morales, Sergio. "Diagramas de interacción axil-flector en secciones doble “T”. Empleo de programa Matlab en aplicaciones estructurales a nivel de sección (parte I) = Axial-bending interaction diagrams for “I” sections. Structural applications related to section study usin." Anales de Edificación 1, no. 1 (2015): 1. http://dx.doi.org/10.20868/ade.2015.3033.

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El método multicapa es una potente herramienta de cálculo en el campo de la ingeniería para tratar problemas a nivel de sección. Este método permite tratar problemas relacionados con el comportamiento no-lineal de los materiales, el empleo de materiales con diferentes propiedades en una misma sección, o problemas relacionados con gradiente de temperatura, entre otros. Dos aplicaciones serán tratadas en dos artículos independientes. En este documento el método multicapa se empleará para generar un diagrama de interacción axil-momento para secciones tipo doble “T”. La sección de acero se estudia

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AlJallad, Sadjad Amir, and Haitham Al-Thairy. "EFFECT OF WEB OPENING ON THE AXIAL LOAD CAPACITY OF STEEL COLUMNS WITH COLD FORMED THIN WALLED SECTION (CFS)." Kufa Journal of Engineering 7, no. 3 (2016): 13–26. http://dx.doi.org/10.30572/2018/kje/731200.

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In this paper, an experimental study has been presented to investigate the effects of web opening on the behavior and failure of steel columns with cold formed thin walled sections (CFS) subjected to axial compressive load. Twenty small scale steel columns with cold formed box and channel sections and a total length of 500 mm have been considered in the experimental tests. Ten of the tested steel columns specimens have a box section with dimensions of (100×100×2) mm (height × width× thickness), and the other ten columns specimens have a channel sections with dimensions of (100×50×2) mm (height

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Wang, Qian, Xin Xin Wang, Chun Sheng Wang, and Yue Xu. "Experimental Research on Steel-Concrete Composite Bridge Towers with Different Cross Sections." Advanced Materials Research 255-260 (May 2011): 1295–98. http://dx.doi.org/10.4028/www.scientific.net/amr.255-260.1295.

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Steel-concrete composite structure has been applied in bridge tower in recent years. In order to investigate the influence of different cross sections on the mechanical behaviors of composite bridge tower, two composite tower models with different cross sections, including rectangle and rectangle with chamfers, were designed and tested under axial compression. Through analysis of the local buckling modes and axial strain of the panels between the two models, it shows that in composite towers, compared with rectangle section, the section of rectangle with chamfers is more favorable in improving

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Szafran, Jacek, and Kazimierz Rykaluk. "Steel Lattice Tower Under Ultimate Load – Chosen Joint Analysis." Civil and Environmental Engineering Reports 25, no. 2 (2017): 199–210. http://dx.doi.org/10.1515/ceer-2017-0030.

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Abstract The main objective of the presented paper is to discuss chosen lattice tower joint behavior under structure ultimate load. Joint numerical modelling considerations are enriched with comparison to the full-scale tower pushover test results. Two independent load cases were examined: 1) where the L-sections (diagonal bracings) are loaded by the axial force only and that forces are applied in the center of the member cross section, 2) where the L-sections are loaded by the axial force and the bending moment that reproduce the effect of the eccentric connection to the gusset plates by the

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Wu, Sheng. "Mechanical Properties of New Type Cold-Formed Steel Box-Shaped Component Welding Section Members." Applied Mechanics and Materials 351-352 (August 2013): 601–9. http://dx.doi.org/10.4028/www.scientific.net/amm.351-352.601.

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Cold-formed steel box-shaped section has the special features in both its mass center and moment center unification as double symmetry section and its outstanding advantage in moment and torsion rigidity. This paper presents a new kind of cold-formed steel box-shaped component welding sections, that is flanges opposite welding box-shaped component section DS. The mechanical properties such as buckling modes, load carrying capacity, rigidity, ductility and correlation curves of new section members which are subjected to axial compression, flexure, combined compression and bending have been anal

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Wang, Hongbo, and Shimin Dong. "Spatial Transverse Vibration Simulation Model of Axially Moving Sucker Rod String under the Excitation of Curved Borehole." Shock and Vibration 2020 (August 6, 2020): 1–18. http://dx.doi.org/10.1155/2020/3108718.

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The mechanical model of transverse vibration of sucker rod string (SRS) in directional well is simplified to the transverse vibration model of longitudinal and transverse curved beam with initial bending under borehole constraints. In this paper, besides considering the excitation of alternating axial load on the transverse vibration of SRS, it is proposed for the first time that curved borehole is also the main excitation for the transverse vibration when the SRS moves reciprocating axially in the borehole. Based on the elastic body vibration theory, the transverse vibration mathematical mode

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Yang, Huadong, and Hong Xu. "The New Performance Calculation Method of Fouled Axial Flow Compressor." Scientific World Journal 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/906151.

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Fouling is the most important performance degradation factor, so it is necessary to accurately predict the effect of fouling on engine performance. In the previous research, it is very difficult to accurately model the fouled axial flow compressor. This paper develops a new performance calculation method of fouled multistage axial flow compressor based on experiment result and operating data. For multistage compressor, the whole compressor is decomposed into two sections. The first section includes the first 50% stages which reflect the fouling level, and the second section includes the last 5

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Reddy, T. J., V. Narayanamurthy, and Y. V. D. Rao. "Study on Crush Tube Geometric Cross sections and Topology for Axial Crashworthiness." Defence Science Journal 70, no. 3 (2020): 249–59. http://dx.doi.org/10.14429/dsj.70.14345.

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Crush tubes are used as crash impact energy absorbing structure (EAS) and are located in the frontal compartment of road vehicles. Ideal crashworthiness of an EAS mandates that the equivalent decelerations due to impact forces should to be ≤ 20g; and crush force and stroke efficiencies should tend to unity. It is understood from the literature that no single geometric cross-section shape exhibits a near-ideal crashworthiness; and most EAS members exhibit a high initial peak crush force which is detrimental to the occupant safety, and moderate stroke and crush force efficiencies leading to a co

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Xu, Hong, Hua Dong Yang, and Guang Ru Hua. "The Performance Calculation Method of Fouled Axial Flow Compressor Based on the Stage Stacking Method." Advanced Materials Research 915-916 (April 2014): 301–4. http://dx.doi.org/10.4028/www.scientific.net/amr.915-916.301.

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Fouling is the most important performance degradation factor, so it is necessary to accurately predict the effect of fouling on engine performance. This paper develops a performance calculation method of fouled multi-stage axial flow compressor based on experiment result and operating data. For multistage compressor, the whole compressor is decomposed into two sections. In this model, the performance of the first section is obtained by stage stacking method by combining scaling law method, linear progression model with traditional stage stacking method. On the other hand, the performance of th

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Elzeadani, Mohamed, Dan Bompa, and Ahmed Elghazouli. "Axial behaviour of steel tubes infilled with rubberised alkali‐activated concrete." ce/papers 6, no. 3-4 (2023): 154–59. http://dx.doi.org/10.1002/cepa.2453.

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AbstractThis study investigates the axial compressive behaviour of concrete filled steel tubes with rubberised alkali‐activated concrete as infill. A high‐strength slag‐based alkali‐activated concrete mix is chosen as a reference and rubber contents of 0, 30 and 60% replacements by volume of natural aggregates are considered. Steel tubes with circular and square cross‐sections having length‐to‐diameter/width ratios of 2 and 4 are investigated. The maximum axial capacity and the axial load‐shortening response are observed. The results show a reduction in the axial capacity and elastic stiffness

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Zhan, Qinjian, Xigui Zheng, Niaz Muhammad Shahani, Xiao Tan, Tao Li, and Jiping Du. "Analysis of Dynamic Response Mechanism of Roadway Bolt." Advances in Civil Engineering 2021 (July 5, 2021): 1–15. http://dx.doi.org/10.1155/2021/5560075.

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This work elucidates dynamic control equations of the anchoring system and the derivation of displacement equations and corresponding vibration modes. Furthermore, the anchoring system is found to be composed of three different vibration modes: (1) when ω < (k1/ρ1A1)1/2, the vibration mode of the anchoring section is an exponential function; (2) when ω = (k1/ρ1A1)1/2, the vibration mode of the anchoring section is a parabolic function; (3) when ω > (k1/ρ1A1)1/2, the vibration mode of the anchoring section is a trigonometric function, while all the free sections are trigonometric function

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Qu, Fu Lai, Pei Yuan Tian, and Lu Yang Qi. "Axial Compression Ratio Limit of L-Shaped Reinforced Concrete Columns with Different Limb Lengths." Applied Mechanics and Materials 438-439 (October 2013): 522–25. http://dx.doi.org/10.4028/www.scientific.net/amm.438-439.522.

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Axial compression ratios of L-shaped columns with different directions of neutral axis were calculated by numerical method. It can be found that the axial compression ratio reaches the minimum value when neutral axis is parallel to the section edge and the shorter limb is compressed, the section scale has little influence on the axial compression ratio of L-shaped columns. On the base of analysis, axial compression ratios of L-shaped columns with different limb lengths are given out.

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Wu, Ze-Hai, and Edward K. N. Yung. "Axial mode elliptical cross-section helical antenna." Microwave and Optical Technology Letters 48, no. 10 (2006): 2080–83. http://dx.doi.org/10.1002/mop.21878.

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Horlock, J. H. "Secondary Flow in Repeating Stages of Axial Turbomachines." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 209, no. 2 (1995): 101–10. http://dx.doi.org/10.1243/pime_proc_1995_209_020_02.

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In a well-designed multi-stage axial flow compressor, the flow settles down to a repeating condition, in which the axial velocity profile does not deteriorate further; it is more or less unchanged between the entry and the exit of a deeply embedded stage. However, experimental data also show that the flow angles repeat, and it is this flow phenomenon that is discussed in the paper. Secondary flow analysis, coupled with empirical data on clearance flows, is used to give a description of the flow in such a repeating stage. The secondary flow at exit from a row involves both the streamwise vortic

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Zhao, Wen Hui, Zhen Yun Duan, and Zhong Wei Ren. "Study on Machining and Measurement for Borosilicate Glass Conical Ellipsoid." Advanced Materials Research 291-294 (July 2011): 2999–3002. http://dx.doi.org/10.4028/www.scientific.net/amr.291-294.2999.

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Surfaces formed by rotating quadratic curve are widely applied in engineering practice. After having studied machining methods and machines, the CNC grinding method based on macro program B for borosilicate glass elliptical cone surface machine with high precision is proposed. Within the allowable error, the coordinates are calculated according to the equation of axial section curve and the surface is formed with tools moving on axial section curve. Through setting parameters of the lathe, the new canned cycle can be defined to process all different kinds of the elliptical cone surface of same

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Wilson, James F. "Smooth Mixed Geometry Profiles of Nozzles and Transition Ducts." Journal of Mechanical Design 127, no. 6 (2005): 1211–13. http://dx.doi.org/10.1115/1.1913704.

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Parametric equations are derived that characterize smooth surface profiles for two general classes of nozzles and nonbranching transition ducts: straight sections for axial flow and curved sections (elbows) for in-plane or out-of-plane flow. For each profile, the terminal cross sections are specified as rectangular, elliptical, circular, or a combination of those shapes. At each terminal and in line with the flow, the displacement, slope, and curvature with its respective intersecting uniform section is maintained. Included is a design example of a 90deg elbow duct whose cross section remains

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Cantrak, Djordje, Novica Jankovic, and Dejan Ilic. "Investigation of the turbulent swirl flow in pipe generated by axial fans using PIV and LDA methods." Theoretical and Applied Mechanics 42, no. 3 (2015): 211–22. http://dx.doi.org/10.2298/tam1503211c.

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In this paper is presented experimental investigation of the turbulent swirl flow in pipe generated by axial fans. Two various models of industrial axial fans are used. One of these is axial fan W30, model AP 400, Minel, Serbia and has seven blades and outer diameter 0.397m. Second axial fan SP30 is model TGT/2-400-6, S&P, Spain, has six blades and outer diameter 0.386m. This results with greater clearance in the second case. Blades were adjusted for both fans at the angle of 30? at the outer diameter. Test rig length is 27.74-D, where D is average inner diameter app. 0.4 m. Measurements a

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Huang, Yan Bin, Wei Ling Huang, Shou Long Zhang, Liu Gang Du, and Jin He Gao. "Uniaxial Spring and Multi-Axial Spring Model for Structural Nonlinear Analysis." Applied Mechanics and Materials 730 (January 2015): 69–72. http://dx.doi.org/10.4028/www.scientific.net/amm.730.69.

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The paper includes the following models for nonlinear structural analysis purpose: (1) uniaxial spring mode (or one-component model);(2) multi-axial spring model (MS model). Moment-curvature relation model considers distributed nonlinearity as well. By specifying the relation of moment and curvature at critical sections, it is not a discretized-section but similar to the uniaxial model in including no interaction among bending and axial tension/compression. This paper describes the models and presents the related formula.

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Uchisako, H., T. Matsumoto, T. Kuramitsu, et al. "Thin-section oblique CT with 25° cranially tilted images." Acta Radiologica 38, no. 2 (1997): 246–49. http://dx.doi.org/10.1080/02841859709172058.

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Purpose: Thin-section oblique CT with cranially tilted axial scans can provide better visualization of the interlobar fissures than thin-section CT with conventional axial scans. the purpose of this study was to evaluate the usefulness of oblique CT scans for pulmonary tumors adjacent to the interlobar fissures. Material and Methods: Cranially tilted and conventional axial images were obtained by thin-section CT in 10 patients with solitary pulmonary tumors adjacent to the interlobar fissures. Conventional CT with a 2-mm collimation and thin-section oblique CT with a 25° cranial tilt were obta

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Shoeib, Ata El-Kariem, Mohammed Salem, Alaa Sheriff, and Mohammed Abdel-Rahman M. Khalil. "Structural behavior of GFRP-concrete composite columns under axial load." Fracture and Structural Integrity 19, no. 72 (2025): 263–79. https://doi.org/10.3221/igf-esis.72.19.

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Glass Fiber Reinforced Polymer (GFRP) is a promising alternative to steel due to its high strength, lightweight properties, corrosion resistance, and low maintenance requirements. This study examines the effect of internal GFRP I-sections on the axial load capacity and fire resistance of reinforced concrete (RC) columns. The experimental program consisted of two groups: the first group, conventional RC columns, with one exposed to 500°C for 90 minutes and the other unheated, and the second group, GFRP I-section reinforced columns, similarly tested under fire and control conditions. Results sho

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Chen, Jian Feng, Tian Hua Zhou, Lin Feng Lu, and Han Heng Wu. "The Study of Post-Fire Load Bearing Capacity of Steel Column under Axial Compression Exposure to one-Side Fire." Advanced Materials Research 284-286 (July 2011): 330–34. http://dx.doi.org/10.4028/www.scientific.net/amr.284-286.330.

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The section of steel column under axial compression presents heterogeneous material and its load condition changes after experiencing fire damage of one side. Taking H-section steel column under axial compression commonly used in engineering for study object in this thesis in order to study post-fire residual load bearing capacity, the post-fire eccentric effect of steel column under axial compression exposure to one-side fire is analyzed using the method of equivalent section which considering the change of the material strength after high temperature, the influence of non-uniform temperature

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Vipin, V. P., and P. A. Krishnan Dr. "A FINITE ELEMENT STUDY ON THE PERFORMANCE OF CORRUGATED STEEL SECTIONS UNDER COMPRESSION." International Journal of Emerging Technologies and Innovative Research Volume 4, Issue 5 May-2017 eISSN: 2349-5162 (2017): 249–51. https://doi.org/10.5281/zenodo.583727.

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Corrugated steel sections are having a wide variety of applications in engineering fields like civil, mechanical, aviation, etc. The unique properties of corrugated steel sections make them a better option compared to the conventional thin steel sections. In the current study behaviour of thin steel shells with corrugations made of mild steel plates under compression is investigated using finite element software ABAQUS. The corrugated sections and the conventional sections under study are having the same area of cross section. For the corrugated sections, trapezoidal profile was used with corr

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Choudhuri, Anjan Rai. "Retrieval of the trace of the true axial surface on an oblique section through a fold." Journal Geological Society of India 45, no. 3 (1995): 311–16. http://dx.doi.org/10.17491/jgsi/1995/450308.

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Abstract On an oblique section, the line connecting the points of maximum curvature of the bounding surfaces of folded layers may not coincide with the trace of the actual axial surface. Methods have been suggested for construction of the true axial trace on an oblique section.

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