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Journal articles on the topic 'V-shaped model'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Kong, Jianyi, Zhao Huang, Xiaodong Xian, Yingrui Wang, and Puliang Yu. "Generalized model for conic-V-shaped flexure hinges." Science Progress 103, no. 4 (2020): 003685042098121. http://dx.doi.org/10.1177/0036850420981211.

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This paper presents a new class of flexure hinges, namely, conic-V-shaped flexure hinges (CFHs), which can be used as a generalized model for flexure hinges with profiles such as parabolic-V-shape, elliptical-V-shape, and hyperbolic-V-shape. Compliance and precision equations for the CFHs were derived as a set of nonlinear equations using Castigliano’s second theorem. The parameters of the nonlinear equations inputted to the compliance and precision matrices were based on the generalized equations used for conic curves in polar coordinates. Furthermore, the compliance equations were verified b

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Bai, Xiuqin, Xuan Zhang, and Chengqing Yuan. "Numerical Analysis of Drag Reduction Performance of Different Shaped Riblet Surfaces." Marine Technology Society Journal 50, no. 1 (2016): 62–72. http://dx.doi.org/10.4031/mtsj.50.1.9.

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AbstractAiming to investigate the drag reduction performance of an antifouling shell rough surface, six different geometries of shell surface texture are simplified as V-shaped riblet, U-shaped riblet, space-V-shaped riblet, blunt-V-shaped riblet, L-shaped riblet, and ∩-shaped riblet. Five kinds of riblets have the same geometric features: groove height and grooved spacing. SST-k-ω model is adopted for the turbulence model. The flow field structure above the different shaped riblet surfaces as well as shear stress and turbulent kinetic energy are analyzed. Moreover, how the flow is influenced

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3

Zhang, Zhuo, Yueqing Yu, and Xuping Zhang. "Vibration Modes and Parameter Analysis of V-Shaped Electrothermal Microactuators." Shock and Vibration 2018 (August 12, 2018): 1–12. http://dx.doi.org/10.1155/2018/1080652.

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Comprehensive analysis on the modal characteristics of V-shaped electrothermal microactuators is presented in this paper for the first time. Considering the unique geometric characteristics of the V-shaped beam, that is, two inclined beams supporting a movable shuttle, both the lateral and longitudinal deflections are taken into account in the modal analysis. Boundary and continuity conditions are employed to obtain the frequency equation. Natural frequencies are then obtained by solving the frequency equation. Mode shapes corresponding to their natural frequencies are also calculated analytic

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4

Hoang, Kien Trung, Vu Cong Ham, Phuc Hong Pham, and Truong Duc Phuc. "An analytical nonlinear displacement model of electrothermal V-shaped actuator." Vietnam Journal of Mechanics 46, no. 2 (2024): 181–90. http://dx.doi.org/10.15625/0866-7136/20980.

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This work presents an analytical model to determine nonlinear displacements of electrothermal V-shaped actuators. The nonlinear displacement model of V-shaped beams fixed at both ends is established based on considering the axial deformation of the beam. The 3D model of the V-shaped microactuator was established to verify the theoretical nonlinear model. The evaluation shows that the displacement deviation between the analytical nonlinear model and simulation is approximately 7.7% at the driving voltage of 16 V. This confirms the advantages of the proposed model to predict more precisely the d

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Yuan, Wei, Jin Xin Sun, Gai Mei Zhang, Da Zhi Liao, and Ya Jun Wang. "Corrugated Board UV Flute-Shaped Structure Size Optimization Design Based on the Finite Element." Applied Mechanics and Materials 469 (November 2013): 213–16. http://dx.doi.org/10.4028/www.scientific.net/amm.469.213.

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UV-shaped corrugated cardboard Fusion V-shaped and U-shaped structure the advantages made, to make up for the lack of V-type and two U-shaped corrugated cardboard, the higher the compressive strength, good elasticity, is widely used UV type corrugated manufacturing corrugated board. But no strict standards for UV-shaped concrete structure of corrugated board size parameter corresponding corrugating roll no uniform size of the corrugated shape, in order to achieve the best elasticity and compressive strength. First, by mathematical methods, the corrugated structure is analyzed, and analysis to

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Yuan, Wei, Gai Mei Zhang, Da Zhi Liao, and Jing Liu. "Corrugated Board Flute-Shaped Finite Element Analysis and Optimization." Applied Mechanics and Materials 477-478 (December 2013): 1205–9. http://dx.doi.org/10.4028/www.scientific.net/amm.477-478.1205.

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UV-shaped corrugated cardboard Fusion V-shaped and U-shaped structure the advantages made, to make up for the lack of V-type and two U-shaped corrugated cardboard, the higher the compressive strength, good elasticity, is widely used UV type corrugated manufacturing corrugated board. But no strict standards for UV-shaped concrete structure of corrugated board size parameter corresponding corrugating roll no uniform size of the corrugated shape, in order to achieve the best elasticity and compressive strength. First, by mathematical methods, the corrugated structure is analyzed, and analysis to

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7

MEHRABI, REZA, and FATEMEH SALEMIZADEH PARIZI. "INVESTIGATION OF MECHANICAL BEHAVIOR OF NiTi STENT UNDER DIFFERENT LOADINGS." Journal of Mechanics in Medicine and Biology 18, no. 06 (2018): 1850029. http://dx.doi.org/10.1142/s021951941850029x.

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Biocompatible stent implants that have been made of shape memory alloys (SMA) are being used in arteries which are restoring normal blood flow. A high failure rate of stent implants in femoral artery causes the investigation of the mechanical behavior of stent implants, and its design and manufacturing, a necessity study. In this paper, two different stent designs, with different geometries, have been simulated. One is a Diamond-shaped profile stent and the other one is a V-shaped profile stent. These stents have been simulated under different loadings such as tensile and bending loadings that

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8

Charoensuk, Kritchanan, and Thunyaseth Sethaput. "The Vibration Analysis Based on Experimental and Finite Element Modeling for Investigating the Effect of a Multi-Notch Location of a Steel Plate." Applied Sciences 13, no. 21 (2023): 12073. http://dx.doi.org/10.3390/app132112073.

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Vibration is challenging and significant in solving engineering problems. The issue of vibration in loaded objects by utilizing a three-dimensional model and experiments. Typically, an object is subjected to a random frequency, which changes the notch shape depending on the frequency model. The investigations determined the performance difference by conducting modal analysis with the finite element method and examining the various forms of each mode. We simulated metal plates with V notch and multiple notch locations on both sides and one side of the notch. The test kits included an accelerome

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9

Arief, Dodi Sofyan, Galuh Leonardo Sihombing, Amir Hamzah, and Andri Andri. "Design Shape and Dimension of Threshing Station Model Palm Oil Mill in PT. Perkebunan Nusantara V - PKS Sei Galuh Using Autodesk AutoCAD 2014 Software." Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) 39, no. 1 (2017): 1–6. https://doi.org/10.36842/jomase.v39i1.390.

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Palm oil mills in PT. Perkebunan Nusantara V PKS - Sei Galuh is a producer of crude palm oil CPO (Crude Palm Oil), which consists of several stations the processing of palm oil, one of which is the threshing station. Threshing station is the station there is a separation palm kernel process with the cluster in a way slammed into a rotating drum. The purpose of this research is to design the shape and dimension of the station threshing model palm oil mill in PT. Perkebunan Nusantara V - PKS Sei Galuh with scale of 1: 8 using Autodesk Autocad 2014 Software. Design of shapes and dimension threshi

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10

Liu, Gang, Fan Wang, and Guan Xin Hong. "Dynamic Modeling and Dynamic Characteristic Analysis of a New Concept Stratospheric V-Shaped Airship." Applied Mechanics and Materials 145 (December 2011): 37–42. http://dx.doi.org/10.4028/www.scientific.net/amm.145.37.

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It has important scientific and engineering applications for near-space platform to design the buoyancy-lifting aircraft with both bigger volume and higher aerodynamic efficiency. This paper provided a design of a new concept V-shaped airship which has a capacity of buoyancy-lifting configuration than the same-weight class conventional airship. In addition, two engines could provide rolling, yawing and pitching moments for the V-shaped airship by changing directions and creating different thrust. Based on the thick aerofoil, the geometry of this V-shaped configuration was then used to develop

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11

Chen, Ming Dong, and Xue Bing Liu. "The Heat Transfer Model of V Shaped Solar Flat-Plate Air Collector." Advanced Materials Research 594-597 (November 2012): 2171–74. http://dx.doi.org/10.4028/www.scientific.net/amr.594-597.2171.

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The V-shaped solar flat-plate air collector was put forward according to the existing problems of solar flat-plate air collector. V-shaped grid plate is used in the solar flat-plate air collector which can improve the efficiency of a flat-plate solar air collector via increase of solar energy absorption efficiency and heat transfer area. Energy balance model of the V-shaped solar flat-plate air collector is established according to the characteristics of internal structure and air flow way, and vent opening position is optimized using the CFD, the results showed that the temperature distributi

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12

Rizki, Tri, and Ismet Danial Nasution. "Hubungan antara bentuk dengan ukuran linggir alveolar pada model studi pasien edentulus penuh Relationship between the shape and size of alveolar ridge in the study model of an edentulous patient." Jurnal Kedokteran Gigi Universitas Padjadjaran 32, no. 1 (2020): 16. http://dx.doi.org/10.24198/jkg.v32i1.21024.

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Pendahuluan: Kehilangan seluruh gigi menyebabkan perubahan pada linggir alveolar yang disebut dengan resorpsi. Resorpsi yang terjadi dapat mengakibatkan perubahan pada bentuk dan ukuran linggir alveolar. Bentuk linggir alveolar dibagi menjadi U, V, dan flat, sedangkan ukuran linggir alveolar dibagi menjadi besar, sedang, dan kecil. Penelitian ini bertujuan untuk menganalisi hubungan antar bentuk dan ukuran linggir alveolar pada model studi pasien edentulous penuh. Metode: Jenis penelitian cross sectional dengan sampel model studi pasien edentulus pada rahang atas dan rahang bawah sebanyak 100

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13

Yang, Xiao Rong, Xue Jing Shen, Min Zhong, and Jiao Xia Lan. "Research on Dynamic Instability of Irregularly-Shaped Arch Bridge Based on Catastrophe Theory." Applied Mechanics and Materials 99-100 (September 2011): 832–37. http://dx.doi.org/10.4028/www.scientific.net/amm.99-100.832.

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According to the characteristic of poor stiffness of V-shaped beams, transverse dynamic instability model of V-shaped is presented by Catastrophe Theory. Mechanism of stability of V-shaped is analyzed. Coordinates of two cusps and instable bifurcation set is derived. Effect of nonlinear coefficient and frequency ratio on amplitude of V-shaped beams are analyzed. When nonlinear coefficient is , continuous change of can arise abrupt change of amplitude. Then the jumping phenomenon can leads destruction of V-shaped beams.

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14

Zheng, Zhong, Beatrice Soh, Herbert E. Huppert, and Howard A. Stone. "Fluid drainage from the edge of a porous reservoir." Journal of Fluid Mechanics 718 (February 8, 2013): 558–68. http://dx.doi.org/10.1017/jfm.2012.630.

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AbstractWe report theoretical and experimental studies to describe buoyancy-driven fluid drainage from a porous medium for configurations where the fluid drains from an edge. We first study homogeneous porous systems. To investigate the influence of heterogeneities, we consider the case where the permeability varies transverse to the flow direction, exemplified by a V-shaped Hele-Shaw cell. Finally, we analyse a model where both the permeability and the porosity vary transverse to the flow direction. In each case, a self-similar solution for the shape of these gravity currents is found and a p

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15

Zhang, Dongpeng, Anjiang Cai, Yulong Zhao, and Tengjiang Hu. "Macro Modeling of V-Shaped Electro-Thermal MEMS Actuator with Human Error Factor." Micromachines 12, no. 6 (2021): 622. http://dx.doi.org/10.3390/mi12060622.

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The V-shaped electro-thermal MEMS actuator model, with the human error factor taken into account, is presented in this paper through the cascading ANSYS simulation model and the Fuzzy mathematics calculation model. The Fuzzy mathematics calculation model introduces the human error factor into the MEMS actuator model by using the BP neural network, which effectively reduces the error between ANSYS simulation results and experimental results to less than 1%. Meanwhile, the V-shaped electro-thermal MEMS actuator model, with the human error factor included, will become more accurate as the databas

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16

Thomson, Robert, and Jarkko Valtonen. "Vehicle Impacts in V-Shaped Ditches." Transportation Research Record: Journal of the Transportation Research Board 1797, no. 1 (2002): 82–88. http://dx.doi.org/10.3141/1797-10.

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V-shaped ditches represent a significant portion of the roadside environment in Sweden and Finland. The consequences of vehicles leaving the road and entering V-shaped ditches are not well documented in simulation or experimental studies. A series of tests were conducted to document the behavior of passenger cars entering V-shaped ditches. Test conditions ranged from 5° to 20° and 80 to 110 km/h. The tests resulted in many vehicles passing over the backslope, and rollovers were observed in four of the tests. Preliminary simulations of the test conditions were not able to fully reconstruct the

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17

Duc Phuc, Truong, Phuc Hong Pham, Kien Trung Hoang, and Bui Ngoc-Tam. "Nonlinear Displacement of the Electrothermal V-Shaped Actuator." Shock and Vibration 2024 (May 2, 2024): 1–10. http://dx.doi.org/10.1155/2024/7121490.

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This article proposes a formula for calculating the nonlinear displacement of the electrothermal V-shaped actuator aims to determine more accurately its displacement. The nonlinear displacement model is established based on the axial deformation of V-beams with two fixed ends. Hence, the theoretical displacements of a particular V-shaped actuator (i.e. dimension as beam length of 750 μm; beam width of 6 μm; beam thickness of 30 μm; inclined angle of 2°) are compared with the simulation and experimental results. The evaluation shows that our calculation error compared with the simulation and ex

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18

Yuan, Wei, Wen Cai Xu, Gai Mei Zhang, and Li Hua Xie. "The Finite Element Study of the Compressive Strength of Typical Waveform Corrugated Box." Applied Mechanics and Materials 262 (December 2012): 390–94. http://dx.doi.org/10.4028/www.scientific.net/amm.262.390.

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The finite element model of a 0201 V-shaped, U-shaped, and UV-shaped single corrugated board corrugated boxes are established. The stress distribution and strain of the three types of waveform corrugated box to withstand the pressure of the top surface stacking are calculated. Three kinds of corrugated board compression are analyzed. Analysis of the structure shows that the V-shaped corrugated board has good rigidity, U-type corrugated box has good cushioning properties, and the range during which the UV type is a better choice. This is consistent with the experimental results, prove the valid

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19

Othman, Muhammad Zulhaiqal, and Ahmed Al Zand. "Numerical Investigation of the Flexural Performance of Slender CFST Beams with Varied Shapes of External Stiffeners." Knowledge-Based Engineering and Sciences 3, no. 2 (2022): 1–17. http://dx.doi.org/10.51526/kbes.2022.3.2.1-17.

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The concrete-filled steel tube (CFST) beams are recommended for adopting in the modern composite structure since it achieves a higher load capacity and ductility behaviour than the conventional structural members. Using CFST beams with slender steel cross-section led to reduce the overall cost of the structures compared to those with compact cross-sections; however, it is more likable to buckle under the compression stress. Therefore, providing external stiffeners along the four sides of CFST beams expected to reduce the overall self-weight also can provide more stiffening to the steel’s secti

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20

Sandeep, Kaur*. "COMPARATIVE ANALYSIS OF SOFTWARE DEVELOPMENT MODELS." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 6, no. 10 (2017): 611–17. https://doi.org/10.5281/zenodo.1036644.

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No geek is unfamiliar with the concept of software development life cycle (SDLC). This research deals with the various SDLC models covering waterfall, spiral, and iterative, agile, V-shaped, prototype model. In the modern era, all the software systems are fallible as they can’t stand with certainty. So, it is tried to compare all aspects of the various models, their pros and cons so that it could be easy to choose a particular model at the time of need

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21

Jakupović, Selma, Ivica Anić, Muhamed Ajanović, et al. "Biomechanics of cervical tooth region and noncarious cervical lesions of different morphology; three-dimensional finite element analysis." European Journal of Dentistry 10, no. 03 (2016): 413–18. http://dx.doi.org/10.4103/1305-7456.184166.

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ABSTRACT Objective: The present study aims to investigate the influence of presence and shape of cervical lesions on biomechanical behavior of mandibular first premolar, subjected to two types of occlusal loading using three-dimensional (3D) finite element method (FEM). Materials and Methods: 3D models of the mandibular premolar are created from a micro computed tomography X-ray image: model of sound mandibular premolar, model with the wedge-shaped cervical lesion (V lesion), and model with saucer-shaped cervical lesion (U lesion). By FEM, straining of the tooth tissues under functional and no

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22

Liqun, Yuan, Men Yuming, and Liu Hongjia. "The Dynamic Response Simulation Analysis of U-Shaped Metro Tunnel." Applied Mechanics and Materials 470 (December 2013): 857–61. http://dx.doi.org/10.4028/www.scientific.net/amm.470.857.

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In order to make model loading plan reasonably, point loads and moving loads are used in the finite element calculation model of subway tunnel, and the result shows that: the time-history curves of acceleration are uniform under two conditions of point loads and moving loads in the U-shaped Metro tunnel orthogonal with the ground fissure, and they are consistent with the load curve. Under two conditions of point loads and moving loads, the maximum displacement along the tunnel arch bottom are at the end of the tunnel and the minimum displacement are at the middle. In these two conditions, the

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23

Kutyavin, M. A. "A dynamic model of a V-shaped free-piston engine." Journal of Machinery Manufacture and Reliability 40, no. 3 (2011): 222–25. http://dx.doi.org/10.3103/s1052618811020075.

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24

Chen, Shiming, Wenzhuo Chen, Yan Chen, Junze Jiang, Zhaojie Wu, and Shuang Zhou. "Research on Film-Forming Characteristics and Mechanism of Painting V-Shaped Surfaces." Coatings 12, no. 5 (2022): 658. http://dx.doi.org/10.3390/coatings12050658.

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Painting a V-shaped surface, which is widely found in various facilities and equipment, often results in poor coating quality, which may be caused by an insufficient understanding of film-forming characteristics and mechanism. In this study, computational fluid dynamic (CFD) simulations were carried out for in-depth research on the film-forming characteristics and mechanism of painting V-shaped surfaces. The mathematical model of film formation was established with the Euler–Euler method, and the unstructured grids and adaptive-mesh refinement were adopted to discretize the computational domai

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25

Wang, Huan Huan, Fang Zhen Wu, Sha Yan Byrapa, et al. "Study of V and Y Shape Frank-Type Stacking Faults Formation in 4H-SiC Epilayer." Materials Science Forum 778-780 (February 2014): 332–37. http://dx.doi.org/10.4028/www.scientific.net/msf.778-780.332.

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Nomarski optical microscopic, KOH etching and synchrotron topographic studies are presented of faint needle-like surface morphological features in 4H-SiC homoepitaxial layers. Grazing incidence synchrotron white beam x-ray topographs show V shaped features which transmission topographs reveal to enclose 1/4[0001] Frank-type stacking faults. Some of these V-shaped features have a tail associated with them and are referred to as Y-shaped defects. Geometric analysis of the size and shape of the V-shaped faults indicates that they are fully contained within the epilayer and appear to be nucleated

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26

Sadr, Katayoun, and Seyyed Mahdi Vahid Pakdel. "A 3-D finite element analysis of the effect of dental implant thread angle on stress distribution in the surrounding bone." Journal of Dental Research, Dental Clinics, Dental Prospects 16, no. 1 (2022): 53–61. http://dx.doi.org/10.34172/joddd.2022.009.

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Background. This study aimed to evaluate the effect of an increase in fixture thread face angle on the amount and distribution of stresses in the surrounding bone of implants with four different thread shapes by three-dimensional finite element analysis. Methods. Eight different fixture designs, with v-shaped, buttress, reverse buttress, and trapezoid threads, and two face angles of 20 and 35 degrees, were modeled using a software program. Each model was affected by two static forces with different values and angles (200-N axial 0° force and 100-N 45° oblique force) to compare the distribution

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Wang, Mingxian, Zifei Fan, Xuyang Dong, Heng Song, Wenqi Zhao, and Guoqing Xu. "Analysis of Flow Behavior for Acid Fracturing Wells in Fractured-Vuggy Carbonate Reservoirs." Mathematical Problems in Engineering 2018 (2018): 1–20. http://dx.doi.org/10.1155/2018/6431910.

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This study develops a mathematical model for transient flow analysis of acid fracturing wells in fractured-vuggy carbonate reservoirs. This model considers a composite system with the inner region containing finite number of artificial fractures and wormholes and the outer region showing a triple-porosity medium. Both analytical and numerical solutions are derived in this work, and the comparison between two solutions verifies the model accurately. Flow behavior is analyzed thoroughly by examining the standard log-log type curves. Flow in this composite system can be divided into six or eight

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MONAGHAN, JOE J., CATHERINE MÉRIEUX, HERBERT E. HUPPERT, and JOHN MANSOUR. "Particulate gravity currents along V-shaped valleys." Journal of Fluid Mechanics 631 (July 17, 2009): 419–40. http://dx.doi.org/10.1017/s0022112009007174.

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This paper extends previous studies of saline gravity currents at high Reynolds number flowing along a tank with a V-shaped valley. We use experiments and a box model to determine the primary features of the flow. The particulate gravity currents were initiated by releasing a fixed volume of fluid consisting of pure water mixed with silicon carbide particles from a lock at one end of the tank. The resulting motion and deposit pattern differ significantly from those for the propagation of a particulate gravity current along a flat-bottomed tank. The front of the current, seen from above, is app

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Ganesan, Sanchanna, Juliet A. Vimala, and C. Likith Kumar. "Dielectric Modeling of Staphylococcus Aureus Bacteria and Shape Optimization of Electrodes for Isolation in Microfluidic Channel: A Numerical Study." Engineering, Technology & Applied Science Research 14, no. 5 (2024): 16660–67. http://dx.doi.org/10.48084/etasr.8144.

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This study investigates the optimization of the electrode shape to isolate bacteria from the blood within a microfluidic channel, employing the dielectrophoretic technique. The examination focuses on the dielectric modeling of Staphylococcus Aureus bacteria to isolate them from blood components, specifically Red Blood Cells (RBC) and platelets. The numerical study utilized the COMSOL Multiphysics software to model three distinct channels, using standard geometric shapes such as triangles, rectangles, and circles as their electrodes. Numerical analyses were carried out to compare the three mode

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Zhang, Yadong, Jialin Zhang, Jianhua Wang, and Luqing Hu. "An evaluation methodology for the circumferential position error of the V-shaped apex of the double-helical gear." Review of Scientific Instruments 94, no. 3 (2023): 035107. http://dx.doi.org/10.1063/5.0118050.

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Aiming to achieve an accurate evaluation of the circumferential position error of the V-shaped apex of double-helical gear, the definition of the V-shaped apex of double-helical gear and the evaluation method of the circumferential position error is studied based on the geometric characteristics of double-helical gear and the definition of shape error. First, the definition of the V-shaped apex of double-helical gear based on the helix and its circumferential position error is presented based on the (American Gear Manufacturers Association) AGMA940-A09 standard. Second, based on the basic para

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Wei, Tiankuo, Chuanzhong Xu, Wei Lin, Gongyi Huang, and Fei Yu. "A Lumped-Parameter Equivalent Circuit Modeling for S-Shaped I–V Kinks of Organic Solar Cells." Crystals 9, no. 2 (2019): 80. http://dx.doi.org/10.3390/cryst9020080.

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We propose an improved lumped-parameter equivalent circuit model to describe S-shaped I–V kinks observed from organic solar cells. Firstly, to predict the S-shaped I–V kinks accurately in both the first and fourth quadrants, a shunt resistor in parallel with extraction diode is added to our previous model. Secondly, based on the Newton–Raphson method, we derive a solution to our improved circuit. Thirdly, our solution is verified by the method of least squares and experiments. Finally, compared with our previous work, the improved circuit has higher accuracy in demonstrating S-shaped I–V kinks

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Wang, Zhen Lu, Xue Jin Shen, Ling Zhou, and Xiao Yang Chen. "Vibration Characteristic Analysis of V-Shaped Electrothermal Microactuator." Key Engineering Materials 503 (February 2012): 118–21. http://dx.doi.org/10.4028/www.scientific.net/kem.503.118.

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This paper is focused on the finite element analysis (FEA) and theoretical calculation of vibration characterization of V-shaped electrothermal microactuator. A vibration mechanical model about V-shaped electrothermal microactuator is presented. By having a comparison between FEA and theoretical calculation about natural frequencies of V-shaped electrothermal microactuator, the maximum error is within 0.19 %. This paper also analyzes the influences of microactuator geometric parameters on natural frequency. The length and thickness have larger effect on the natural frequency of the actuator, w

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Liu, Dunwen, Jianjun Zhang, Yu Tang, Yinghua Jian, and Caiwu Cai. "Damage Analysis of Concrete Structure under Multidirectional Shaped Charge Blasting Using Model Experiment and Ultrasonic Testing." Advances in Civil Engineering 2021 (March 22, 2021): 1–11. http://dx.doi.org/10.1155/2021/6677041.

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Quantitatively analyzing multidirectional shaped charge blasting energy distribution and improving the rock-fracturing efficiency have been a challenging problem in blasting and civil engineering. In this work, we carry out four groups of concrete model experiments using ultrasonic testing, comparing conventional blasting, and multidirectional shaped charge blasting. Then, the probability and statistics method is used to quantitatively analyze the blasting damage and the energy distribution. The test results show that ultrasonic testing and statistics model can quantitatively evaluate the dama

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Abedi, Hussam Aldin O., and Mohammed M. Rasheed. "Effect of Double Interior Stiffeners on the Flexural Behavior of Concrete Filled Steel Tube Composite Box Girders." Engineering, Technology & Applied Science Research 13, no. 6 (2023): 12175–82. http://dx.doi.org/10.48084/etasr.6282.

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A composite box girder is a type of structural element that possesses strong torsional stiffness and resistance against flexural forces. A new category of bridge structure has been established: one that consists of concrete-filled steel tubes connected to composite slabs by steel trusses. In this study, an experimental and computational analysis of flexural loadings on four different types of composite box girders that are connected to concrete-filled steel tubes is presented. The specimens in this test are subjected to a concentrated load at the span's midpoint. The first model is a concrete-

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Wang, Jinsheng, Lei Luo, Lei Wang, Bengt Ake Sunden, and Songtao Wang. "Thermal performance of angled, V-shaped and leaning-V-shaped ribs in a rotating rectangular channel with 45° orientation." International Journal of Numerical Methods for Heat & Fluid Flow 28, no. 3 (2018): 661–83. http://dx.doi.org/10.1108/hff-04-2017-0139.

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Purpose The fluid flow in a rotating channel is obviously different from that in a stationary channel due to the existence of Coriolis force, which, in turn, enhances the heat transfer on the trailing side and reduces the heat transfer on the leading side. The purpose of this paper is to study various rib configurations combined with channel orientation on heat transfer and frictional loss in a rotating channel. Design/methodology/approach In the present study, the k-ω SST model was used as the turbulence model. The fluid flow direction in the channel is radially outward. The angle between the

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Jia,, Rongguang, Arash Saidi, and, and Bengt Sunden. "Heat Transfer Enhancement in Square Ducts With V-Shaped Ribs." Journal of Turbomachinery 125, no. 4 (2003): 788–91. http://dx.doi.org/10.1115/1.1622708.

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This paper concerns a numerical investigation of the heat and fluid flow in V-shaped ribbed ducts. The Navier-Stokes equations and the energy equation are solved in conjunction with a low Reynolds number k–ε turbulence model. The Reynolds turbulent stresses are computed with an explicit algebraic stress model (EASM) while the turbulent heat fluxes are calculated with a simple eddy diffusivity model (SED). Detailed velocity and thermal field results have been used to explain the effects of the V-shaped ribs and the mechanisms of the heat transfer enhancement.

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Hey, Richard, Fernando Martinez, Ármann Höskuldsson, and Ásdís Benediktsdóttir. "Propagating rift model for the V-shaped ridges south of Iceland." Geochemistry, Geophysics, Geosystems 11, no. 3 (2010): n/a. http://dx.doi.org/10.1029/2009gc002865.

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Enikov, E. T., S. S. Kedar, and K. V. Lazarov. "Analytical model for analysis and design of V-shaped thermal microactuators." Journal of Microelectromechanical Systems 14, no. 4 (2005): 788–98. http://dx.doi.org/10.1109/jmems.2005.845449.

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Annuryanti, Febri, Juan Domínguez-Robles, Qonita Kurnia Anjani, Muhammad Faris Adrianto, Eneko Larrañeta, and Raghu Raj Singh Thakur. "Fabrication and Characterisation of 3D-Printed Triamcinolone Acetonide-Loaded Polycaprolactone-Based Ocular Implants." Pharmaceutics 15, no. 1 (2023): 243. http://dx.doi.org/10.3390/pharmaceutics15010243.

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Triamcinolone acetonide (TA) is a corticosteroid that has been used to treat posterior segment eye diseases. TA is injected intravitreally in the management of neovascular disorders; however, frequent intravitreal injections result in many potential side effects and poor patient compliance. In this work, a 3D bioprinter was used to prepare polycaprolactone (PCL) implants loaded with TA. Implants were manufactured with different shapes (filament-, rectangular-, and circle-shaped) and drug loadings (5, 10, and 20%). The characterisation results showed that TA was successfully mixed and incorpora

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Liew Hui Fang, Rosemizi Abd Rahim, Muhammad Izuan Fahmi, and Vmalen Kupusamy. "Modelling and Characterization Piezoelectric Transducer for Sound Wave Energy Harvesting." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 102, no. 2 (2023): 81–98. http://dx.doi.org/10.37934/arfmts.102.2.8198.

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Energy harvesting system is using ambient energy conversion in the environment. The environmental energy will be converted into usable electrical energy that can be used in controlling wireless electronic devices. The available mechanical vibration from the sound energy will then be converted to electrical energy by using a piezoelectric transducer. The size of the piezoelectric represents the surface area of the electrode on the piezoelectric model. A smaller size piezoelectric transducer is unable to produce a good vibration due to the smaller surface area. The bigger dimension of the piezoe

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Karpouzian, G., G. Spedding, and H. K. Cheng. "Lunate-tail swimming propulsion. Part 2. Performance analysis." Journal of Fluid Mechanics 210 (January 1990): 329–51. http://dx.doi.org/10.1017/s0022112090001318.

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The theory of an oscillating, high-aspect-ratio, lifting surface with a curved centreline (Cheng & Murillo 1984) is applied to a performance analysis of lunate-tail swimming propulsion. Thrust, power and propulsive efficiency are calculated for model lunate tails with various combinations of mode shapes and morphological features to ascertain the viability of the proportional-feathering concept, and to determine the influence of sweep and centreline curvature. One of the principal conclusions concerns the interchangeability of the heaving amplitude of the peduncle (identified with the majo

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Rio, Prabowo, Febrianto Adhi, Tuswan Tuswan, and Dwi Danardono. "Performance evaluation on the designed v-shaped monohull ship models." Journal of Applied Engineering Science 20, no. 2 (2022): 610–24. http://dx.doi.org/10.5937/jaes0-35481.

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A typical ship must operate in extreme conditions in the open coastal zone. Due to the severe operation at sea, comparative research on the design of the hull shape for optimization purposes will be important, specifically in the resistance and movement aspect. In this regard, an investigation was carried out by varying the total of four V-shaped monohull models from the high-built design as the main subject to compare several hull shape designs at the same displacement to obtain better performance at stability, resistance, and seakeeping criteria. Savitsky formula is used to calculate the hul

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Dlamini, M. V. "The Effects of Three Furrow Shapes on Water Advance Characteristics, Application Efficiency, Deep Percolation and Tail Water Run-off." International Journal of Engineering Research & Science 7, no. 12 (2021): 22–29. https://doi.org/10.5281/zenodo.5809752.

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<strong>Abstract</strong><strong>—</strong> Furrow irrigation is considered to be inefficient when compared to most pressurized irrigation systems. The objective of this research was to determine if different furrow shapes have different impacts on water management practices such as application efficiency, deep percolation ratio and tail water runoff. Three furrow shapes, a triangular (V-shaped), rectangular (R) and trapezoidal (T<sub>p</sub>) shaped were evaluated and the results were compared with output from SIRMOD II. The parameters calculated from field data were not very different

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Dzung, Nguyen Tien, Pham Hong Phuc, Nguyen Quang Dich, and Nguyen Doan Phuoc. "Iterative Learning Control for V-Shaped Electrothermal Microactuator." Electronics 8, no. 12 (2019): 1410. http://dx.doi.org/10.3390/electronics8121410.

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The paper introduces a modified version of a Proportional Integral Derivative (PID)-type iterative learning algorithm, which is very simple to implement on a digital control device for tracking control of a continuous-time system. The simulative application of it is for controlling a V-shaped electrothermal microactuator (VEM) and is carried out by using a Simscape model of VEM for the purpose that the asymptotic tracking behavior of system output to desired trajectory will be verified in a virtually real environment. Obtained simulation results confirm that the introduced iterative learning a

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Yang, Yu, Zhang Ming-Ming, and Li Xue-Song. "Numerical investigation of V-shaped riblets and an improved model of riblet effects." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 9 (2017): 1622–31. http://dx.doi.org/10.1177/0954406217705907.

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Symmetric V-shaped riblets are simulated by using the computational fluid dynamic method to understand the riblet effects on the turbulent boundary layer and the skin friction reduction. Three classical turbulence models, namely Spalart–Allmaras, shear stress transport, and re-normalization group k-epsilon models, are investigated under different grid densities. The re-normalization group model produces good results consistent with the experiment, as compared with the existing theoretical and experimental drag results of the flat plate and the V-shaped riblets with different sizes. Simulating

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Huangfu, Shuang-E., Zhong Tao, Zhenglin Zhang, Zihao Wang, and Ji Zhang. "Numerical Study on the Shear Behavior of a Late-Model Cold-Formed Stainless Steel C-Shaped Beam." Materials 18, no. 1 (2024): 91. https://doi.org/10.3390/ma18010091.

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The failure mode of thin-walled C-channel beams typically manifests as premature local buckling of the compression flange, leading to insufficient utilization of material strength in both the flange and the web. To address this issue, this study adopts the approach of increasing the number of bends to reinforce the flange and adding V-shaped stiffeners in the middle of the web to reduce the width-to-thickness ratio of the plate elements, thereby delaying local buckling and allowing for greater plastic deformation. However, the challenge lies in the irregular cross-sectional shape and complex b

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Wang, Meihua, Cheng Li, Honggang Xue, and Fengmin Xu. "A New Portfolio Rebalancing Model with Transaction Costs." Journal of Applied Mathematics 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/942374.

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A portfolio rebalancing model with self-finance strategy and consideration of V-shaped transaction cost is presented in this paper. Our main contribution is that a new constraint is introduced to confirm that the rebalance necessity of the existing portfolio needs to be adjusted. The constraint is constructed by considering both the transaction amount and transaction cost without any additional supply to the investment amount. The V-shaped transaction cost function is used to calculate the transaction cost of the portfolio, and conditional value at risk (CVaR) is used to measure the risk of th

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El, Khazen, H. Benticha, and F. X. Demoulin. "Numerical simulation of a premixed turbulent V-shaped flame." Thermal Science 15, no. 2 (2011): 311–20. http://dx.doi.org/10.2298/tsci090120012e.

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de ROUEN, Saint Etienne du Rouvray, Cedex, France AU Jemni A. AF Laboratoire d?Etudes de Syst?mes thermiques et Energ?tique (LESTE), Monastir, Tunisie KW premixed turbulent combustion % numerical simulation % V-flame KR nema AB In this paper we simulate a turbulent premixed V-shape flame stabilized on a hot wire. The device used is composed of a vertical combustion chamber where the methane-air mixture is convected upwards with a mean velocity of 4ms-1. The flow was simulated running Fluent 6.3, which numerically solved the stationary Favre-averaged mass balance; Navier-Stokes equations; combu

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Fan, Guiju, Siyu Wang, Peng Bai, Dongwei Wang, Wenjie Shi, and Chengqiang Niu. "Research on Droplets Deposition Characteristics of Anti-Drift Spray Device with Multi-Airflow Synergy Based on CFD Simulation." Applied Sciences 12, no. 14 (2022): 7082. http://dx.doi.org/10.3390/app12147082.

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With the increase in orchard areas and the transfer of rural labor, various air-assisted sprayers have been widely used in China. However, the problem of off-target drift still exists, which has caused pesticide waste and environmental pollution. In order to improve the droplet deposition in the canopy of fruit trees, a V-shaped anti-drift spray device with multi-airflow synergy was designed in this paper. A droplet spatial motion model was constructed, and the anti-drift mechanism of multi-airflow synergy was clarified based on particle dynamics analysis. The influences of spray pressure and

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Selvanose, Smitha Mol, Siva Marimuthu, Abdul Waheed Awan, and Kamran Daniel. "NACA 2412 Drag Reduction Using V-Shaped Riblets." Eng 5, no. 2 (2024): 944–57. http://dx.doi.org/10.3390/eng5020051.

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This research focuses on addressing a significant concern in the aviation industry, which is drag. The primary objective of this project is to achieve drag reduction through the implementation of riblets on a wing featuring the NACA 2412 aerofoil, operating at subsonic speeds. Riblets, with the flow direction on wing surfaces, have demonstrated the potential to effectively decrease drag in diverse applications. This investigation includes computational analysis within the ANSYS Workbench framework, employing a polyhedral mesh model. The scope of this research encompasses the analysis of both a

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