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1

Trotea, Mario, Augustin Constantinescu, and Loreta Simniceanu. "Analytical Calculation, Numerical Structural Analysis and Design Optimization of the Diaphragm Spring of a Mechanical Clutch." Applied Mechanics and Materials 896 (February 2020): 151–62. http://dx.doi.org/10.4028/www.scientific.net/amm.896.151.

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This paper considers the diaphragm spring of a mechanical clutch being composed by a conical disk spring and trapezoidal lamellar springs attached to the disk spring. After analytical calculation of the disk spring a numerical structural analysis was performed in order to validate the 3D model of the disk spring. A design optimization with 4 design variables was done for the disk spring and, based on the optimized design, the 3D model of the diaphragm spring was built. A 6 design variables model of the diaphragm spring was proposed for design optimization analysis having as design objective the minimization of the maximum equivalent stress during disengaging the clutch.
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2

Xu, Hai Hua, Yu Chun Ye, and Guang Fu Li. "Experimental Study on Shot Peening to Improve Diaphragm Spring Fatigue Life of Automobile Clutch." Advanced Materials Research 941-944 (June 2014): 1497–500. http://dx.doi.org/10.4028/www.scientific.net/amr.941-944.1497.

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In the modern automotive industry, diaphragm spring clutch is widely used in light-duty and mini cars. Its service life depends on the performance and quality of pressure element-diaphragm spring. Improving diaphragm spring fatigue life and reducing elastic force decay rate will extend service life of diaphragm spring clutch. By comparing the fatigue life through bench test, shot peening on diaphragm spring can observably improve working fatigue life.
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3

Dutta, Trinoy, and Lopamudra Baruah. "Engagement Model of Dry Friction Clutch with Diaphragm Spring." International Journal of Engineering Research 3, no. 11 (November 1, 2014): 704–10. http://dx.doi.org/10.17950/ijer/v3s11/1117.

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4

Hubbard, Mont. "Effects of Diaphragm Compliance on Spring-Diaphragm Pressure Regulator Dynamics." Journal of Dynamic Systems, Measurement, and Control 124, no. 2 (May 10, 2002): 290–96. http://dx.doi.org/10.1115/1.1470174.

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A dynamical model is derived for a spring-diaphragm type automotive pressure regulator containing an annular membrane. Previous studies have generally assumed that the diaphragm was of constant area and that it remained flat. Central features of the model presented are the calculation of the deformed shape of the annular diaphragm and the effects of its resulting fluid compliance and force on the drain orifice cover plate. Elasticity theory is used to derive the diaphragm two-port compliance relation that is integrated into an overall regulator dynamic model. Effects of diaphragm elastic modulus on system dynamic response are studied. The model and its results may be used in other design parameter studies and as a component of a fueling system dynamic model.
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5

Zhiming, Ye, and Yeh Kaiyuan. "A Study of Belleville Spring and Diaphragm Spring in Engineering." Journal of Applied Mechanics 57, no. 4 (December 1, 1990): 1026–31. http://dx.doi.org/10.1115/1.2897621.

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This paper deals with the static response of a Belleville spring and a diaphragm spring by using the finite rotation and large deflection theories of a beam and conical shell, and an experimental method as well. The authors propose new mechanical analysis mathematical models. The exact solution of a variable width cantilever beam is obtained. By using the integral equation method and the iterative method to solve the simplified equations and Reissner’s equations of finite rotation and large deflection of a conical shell, this paper has calculated a great number of numerical results. The properties of loads, strains, stresses and displacements, and the distribution rules of strains and stresses of diaphragm springs are investigated in detail by means of the experimental method. The unreasonableness of several assumptions in traditional theories and calculating method is pointed out.
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6

Guo, Cui Xia, and Hong Zhi Zhang. "Optimization Design for the Diaphragm Spring of Automobile Clutch." Advanced Materials Research 889-890 (February 2014): 268–71. http://dx.doi.org/10.4028/www.scientific.net/amr.889-890.268.

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The diaphragm spring is the key element in modern automobile clutch. Its elastic characteristic affects the overall performance of the clutch. Taking a car as an example, According to the design requirements and characteristics, it was to establish the mathematical model of optimum design of automobile clutch diaphragm spring. It was to optimize the design parameters of the basic structure of the diaphragm spring by using the MATLAB optimization toolbox. It did finite element analysis for the 3D modeling using ANSYS software. The results show that: it can be obtained more reasonably of the diaphragm spring elastic curve by the optimal design, shorten the design cycle, reduce the cost of.
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7

Wang, Ruo Ping, Guo Dong Zhang, Xiang Gao, and Chang Gao Xia. "Study on Probabilistic Optimal Design of Diaphragm Spring." Advanced Materials Research 148-149 (October 2010): 1057–61. http://dx.doi.org/10.4028/www.scientific.net/amr.148-149.1057.

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The mathematical model of probabilistic optimization is established for diaphragm spring. The process and the method of design with an example are presented. The result shows the model and the method of design are feasible, and perfect optimal result is attained. Vehicle has mass production and its conditions of use are changeable, which determine design parameters and operating parameters of its parts have complex randomness. Diaphragm spring clutch is now widely used by many kinds of vehicles. Research of diaphragm spring parameters’ probabilistic and statistics model and the study of its optimal design have great significance for the design, R & D, manufacturing and use of automotive products and parts. Studies in the references[1,2,3] have shown that the root cause of diaphragm spring’s fatigue fracture is the original crackles near the concave inner edge point, so there is a need to do probabilistic optimal design for diaphragm spring’s structural parameters to improve the fatigue life.
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8

Jin, Wei Dong. "Solid Modeling and Finite Element Analysis of Diaphragm Spring Clutch." Advanced Materials Research 452-453 (January 2012): 258–63. http://dx.doi.org/10.4028/www.scientific.net/amr.452-453.258.

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Taking a kind diaphragm spring of automobile clutch as an example, a finite element analysis based on ANSYS WORKBENCH was studied and explained in this paper. Stress and strain variation of diaphragm spring was obtained by using static analysis, and each modal, frequency and amplitude was all achieved by applying modal analysis. And the results may provide a theoretical reference to improving structure design of automotive diaphragm spring clutch
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9

Guo, Gui Mei, and Lin Hong. "Influences of Diaphragm Springs on Operation Performances of Sight-Stabilizing Mechanism." Advanced Materials Research 211-212 (February 2011): 384–88. http://dx.doi.org/10.4028/www.scientific.net/amr.211-212.384.

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Sight-stabilizing mechanisms controlled by diaphragm springs and other damping elements is an important subordinate system of airborne sight stabilizing System. The performances of sight-stabilizing system depend on the characteristics of kinematics and dynamics of the system in a great extent. Among various external moments acting on the rod of the manipulator, such as those moments caused by damper, positioning spring, and restoration spring, the forces by diaphragm springs are most obvious. According to the structure form and motion peculiarity, the rod can be equivalent to a rigid body turning around a fix point. Simulation results reveal that the moment of the restoration spring to the rod is proportional to the angular displacement, and that the moment is the most prominent factor influencing the operating performances among all these moments. Through reasonable adjustments of structural parameters of the restoration spring, the performances of the sight-stabilizing system can be improved greatly; the analysis method provides a basis for guiding the design of concerned structural parameters of sight-stabilizing system.
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10

Afshar, Behrad Habib, and Michel J. F. Digonnet. "Spring-Loaded Diaphragm-Based Fiber Acoustic Sensor." Journal of Lightwave Technology 37, no. 18 (September 15, 2019): 4830–37. http://dx.doi.org/10.1109/jlt.2019.2923369.

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11

Xie, Hai Feng, Zhi Gang Yang, and Meng Jie. "Design and Test of Piezoelectric Resonant Diaphragm Air Pump." Applied Mechanics and Materials 220-223 (November 2012): 539–42. http://dx.doi.org/10.4028/www.scientific.net/amm.220-223.539.

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To improve the driving ability of gas and light fluid which is sensitive to the temperature change, based on the system resonant principle a novel kind of piezoelectric resonant diaphragm air pump has been proposed. Experimental results indicate that the maximum flow rate is 1650ml/min when the sinusoidal AC driving voltage is 200v, the vibrating spring thickness is 0.6mm, the adjusting spring thickness is 1.4mm, and it was 0.5 as the radius ratio of the rigidity transfer vibration piston and the diaphragm.
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12

Pang, W. C., and D. V. Rosowsky. "Beam–spring model for timber diaphragm and shear walls." Proceedings of the Institution of Civil Engineers - Structures and Buildings 163, no. 4 (August 2010): 227–44. http://dx.doi.org/10.1680/stbu.2010.163.4.227.

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13

Sedaghat, Sedighe Babaei, and Bahram Azizollah Ganji. "A novel MEMS capacitive microphone using spring-type diaphragm." Microsystem Technologies 25, no. 1 (May 15, 2018): 217–24. http://dx.doi.org/10.1007/s00542-018-3951-x.

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14

Jiang, Shu Yong, Yan Qiu Zhang, Jin Feng Sun, and Li Hong Zhao. "Analysis of Fracture Failure of Diaphragm of Non-Contact Electronic Horn." Advanced Materials Research 97-101 (March 2010): 514–17. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.514.

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The fracture of the diaphragm is the main failure pattern of the non-contact electronic horn. The spring steel strip 50CrVA which is cold rolled was applied to manufacture the diaphragm of the non-contact electronic horn by means of sheet metal forming. The combination of the experiments with finite element method (FEM) was used to reveal mechanism of fracture failure of the diaphragm. The displacement field, the effective strain field and the effective stress field at the maximum amplitude value are obtained by simulating the genuine vibrating state of the diaphragm with the help of ANSYS finite element code. The maximum stress zone of the stress field of the diaphragm is responsible for the fracture zone of the diaphragm. The fatigue test of the diaphragm and microscopy of the fractured diaphragm indicates that the fracture pattern of the diaphragm agree well with finite element simulation results. Eventually, the measures to prevent the fracture of the diaphragm were taken in order to increase the endurance of the diaphragm.
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15

Trotea, Mario, Augustin Constantinescu, Dumitru Neagoe, and Loreta Simniceanu. "Design Optimization of the Diaphragm Spring of a Mechanical Clutch for Motor Cars." Applied Mechanics and Materials 822 (January 2016): 123–34. http://dx.doi.org/10.4028/www.scientific.net/amm.822.123.

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In this paper it is presented the design optimization of the diaphragm spring for a mechanical clutch. The slot shape of the fingers was parameterized and the objective function was the maximum tangential stress to be minimized subjected to the constraint that the deflection of the spring on exterior diameter in the spring centreline direction has a minimum certain value when the clutch is disengaged.
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16

Zhang, Yan Qiu, Shu Yong Jiang, and Yu Feng Zheng. "Prediction of Springback in Metal Forming of Diaphragm of Automotive Horn Based on BPANN." Advanced Materials Research 139-141 (October 2010): 594–99. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.594.

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The spring steel strip 50CrVA which is cold rolled was applied to manufacture the diaphragm of the automotive horn by means of sheet metal forming. The combination of the experiments with back-propagation artificial neural network (BPANN) is used to solve the springback problem of the diaphragm. Experiments have shown that a 4-8-1 BPANN is able to predict the springback of the diaphragm successfully, and the network is able to model the relationship between the springback of the diaphragm and the process parameters rationally. BPANN simulation results and experimental ones have shown that the springback of the diaphragm is particularly influenced by such parameters as blank thickness, Young’s modulus, punch radius and yield ratio. Furthermore, the springback of the diaphragm decreases with the increase of blank thickness and Young’s modulus, but increases with the increase of punch radius and yield ratio.
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17

Jin, Wei Dong. "Solid Modeling and Finite Element Analysis of Diaphragm Spring Clutch." Advanced Materials Research 452-453 (January 2012): 258–63. http://dx.doi.org/10.4028/scientific5/amr.452-453.258.

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18

Shu, Jicheng, Jianping Sun, Dingwen Zhang, and Huanwei Wei. "Sequential Measurement and Analysis of Large Underground Retaining Structures by Diaphragm Wall Anchor for the Spring Area." Advances in Civil Engineering 2019 (November 11, 2019): 1–21. http://dx.doi.org/10.1155/2019/5291420.

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The performance of a diaphragm wall-anchor structure in spring area in Jinan city, China, is studied. Based on field measured data, lateral wall deflections, lateral soil movements, horizontal displacement of the capping beam, the maximum lateral wall deflection, ground surface settlement, lateral earth pressures on diaphragm wall, internal force of diaphragm wall, axial anchoring forces, settlements of adjacent building, and pore-water pressure are investigated. The results indicate that the maximum deflections of the lateral wall are 0.07%∼0.18% of the excavation depth (He). The ground surface settlement influence zone extends beyond 2.5He from the pit for this project. The δv,max ranges from 0.67 δh,max to 1.0 δh,max. The maximum lateral active earth pressures on diaphragm walls above the excavation bases range between 0.4He and 0.6He. The axial anchoring forces of the top three layers of anchors change significantly during the excavation while the axial anchoring force of the fourth layer of anchor is constant. The deformation of surrounding building has three stages, including a uniform subsidence stage, an accelerated subsidence stage, and a stable subsidence stage.
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19

Zheng, Jin, Bo Chen, Hou Jun Xu, and Yun Li Yang. "Numerical Study on Shearing Properties of Profiled Steel Sheets." Applied Mechanics and Materials 166-169 (May 2012): 2887–91. http://dx.doi.org/10.4028/www.scientific.net/amm.166-169.2887.

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The structural diaphragm effects have been investigated in the past decades with major attention on the properties of diaphragm panels. The research observations made by the oversea researchers cannot be directly utilized to the design construction of Chinese light gauge steel structures due to the different configuration of profiled steel sheets, fasteners, and purlins in China. In this regard, the shearing strength and stiffness of diaphragm steel sheets are investigated in this study through numerical study. The profiled steel sheet and fastener are simulated by the ortho-anisotropic flat plate and three one dimensional nonlinear spring, respectively. The analytical models are developed for examining the shearing strength and stiffness induced by diaphragm effects of a cladding system. The made observations indicate that the diaphragm effects of the steel sheet on the structure are obvious.
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20

Zhao, Zuyu, H. Q. Yang, Shireen Adenwalla, J. B. Ketterson, and Bimal K. Sarma. "Novel compressional cell for liquid and solid 3He experiments." Canadian Journal of Physics 65, no. 11 (November 1, 1987): 1534–35. http://dx.doi.org/10.1139/p87-245.

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A pressure compactor has been assembled for spin-polarized liquid and solid 3He experiments. In place of a Kapton diaphragm, a beryllium–copper spring–bellows combination was used to attain a large volume change of 3He. The spring was specially designed and tested to ensure that its displacement at low temperature was a reversible process.
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21

Lee, Choon Yeol, Il Sup Chung, and Young Suck Chai. "12Finite Element Analysis of an Automobile Clutch System." Key Engineering Materials 353-358 (September 2007): 2707–11. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.2707.

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A pressure plate, a component of the clutch system, was analyzed by two-dimensional and three-dimensional finite element method under three major load conditions of thermal loading due to temperature distribution, centrifugal force and contact pressure of diaphragm spring. The results show that the effects of thermal loading and contact pressure of diaphragm spring are important, which suggests the direction of design improvement. A hub plate was also analyzed with finite element modeling. A stress concentration occurs around the fillet region around the window in the plate where the fracture analysis is executed to find the stress intensity factors. These results will be used as the fundamental data for design improvement of the shapes of pressure plates and hub plates.
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22

Mohamad, Norizan, Pio Iovenitti, and Thurai Vinay. "Modelling and Optimisation of a Spring-Supported Diaphragm Capacitive MEMS Microphone." Engineering 02, no. 10 (2010): 762–70. http://dx.doi.org/10.4236/eng.2010.210098.

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23

SHIOBARA, Hitoshi, Takashi AKASAKA, Kimio SHIMADA, and Masanori HARADA. "Spring Constant of Pressurized Diaphragm made of Fabrics Reinforced Rubber Sheet." NIPPON GOMU KYOKAISHI 68, no. 7 (1995): 479–88. http://dx.doi.org/10.2324/gomu.68.479.

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24

Kaya, Necmettin. "Optimal design of an automotive diaphragm spring with high fatigue resistance." International Journal of Vehicle Design 40, no. 1/2/3 (2006): 126. http://dx.doi.org/10.1504/ijvd.2006.008457.

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25

Peña-García, Néstor N., Luz A. Aguilera-Cortés, Max A. González-Palacios, Jean-Pierre Raskin, and Agustín L. Herrera-May. "Design and Modeling of a MEMS Dual-Backplate Capacitive Microphone with Spring-Supported Diaphragm for Mobile Device Applications." Sensors 18, no. 10 (October 19, 2018): 3545. http://dx.doi.org/10.3390/s18103545.

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New mobile devices need microphones with a small size, low noise level, reduced cost and high stability respect to variations of temperature and humidity. These characteristics can be obtained using Microelectromechanical Systems (MEMS) microphones, which are substituting for conventional electret condenser microphones (ECM). We present the design and modeling of a capacitive dual-backplate MEMS microphone with a novel circular diaphragm (600 µm diameter and 2.25 µm thickness) supported by fifteen polysilicon springs (2.25 µm thickness). These springs increase the effective area (86.85% of the total area), the linearity and sensitivity of the diaphragm. This design is based on the SUMMiT V fabrication process from Sandia National Laboratories. A lumped element model is obtained to predict the electrical and mechanical behavior of the microphone as a function of the diaphragm dimensions. In addition, models of the finite element method (FEM) are implemented to estimate the resonance frequencies, deflections, and stresses of the diaphragm. The results of the analytical models agree well with those of the FEM models. Applying a bias voltage of 3 V, the designed microphone has a bandwidth from 31 Hz to 27 kHz with 3 dB sensitivity variation, a sensitivity of 34.4 mV/Pa, a pull-in voltage of 6.17 V and a signal to noise ratio of 62 dBA. The results of the proposed microphone performance are suitable for mobile device applications.
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26

Yan, Xiao Xin, Zong Ming Li, and Yue Hua Chu. "Numerical Simulation Study on Superposed Combined Exterior Protected Structure." Applied Mechanics and Materials 97-98 (September 2011): 73–77. http://dx.doi.org/10.4028/www.scientific.net/amm.97-98.73.

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In this article, the waterproof curtain, the underground diaphragm wall and the soil between them are regarded as superposed combined exterior protected structure, then build a flexible spring support system. When using senior ANSYS finite element analysis program to simulate the strained condition and displacement of the underground diaphragm wall, we will combine with the monitoring result and the result of traditional comouting method. After contrasting, we can get a conclusion: the strained condition and displacement of the wall of this simulation method are more coincident with practical projects, and can reduce unnecessary waste.
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27

Krishnasamy, Karthik, Francois Masse, and Olivier Simon. "Fatigue analysis of Diaphragm spring in double dry clutch including manufacturing process." Procedia Engineering 213 (2018): 606–12. http://dx.doi.org/10.1016/j.proeng.2018.02.056.

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28

Murata, A., Y. Kume, and F. Hashimoto. "Application of catastrophe theory to forced vibration of a diaphragm air spring." Journal of Sound and Vibration 112, no. 1 (January 1987): 31–44. http://dx.doi.org/10.1016/s0022-460x(87)80091-3.

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29

Jaison, Jerry, Vasudevan Nagaraj, and Arockia Selvakumar A. "A Novel Gripper design for Diaphragm spring plate Pick and Place Cobot." International Journal of Engineering & Technology 7, no. 4.36 (December 9, 2018): 394. http://dx.doi.org/10.14419/ijet.v7i4.36.23812.

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Robot integrated manufacturing has turned out to be the future of manufacturing automation technology. Worker assisting robots perform simultaneously operation including machining, assembly, inspection, material handling etc. and in some case multiple operations in the same system at a faster and precise rate. Collaborative robots are human and computer controlled hybrid material handling device which facilitates the concept of shared workspace. To exploit its function, gripper mechanisms are inevitable. This project focuses on the design of cobotic grippers for pick and place application. Of the different concepts compared a suitable design is chosen. The gripper moves according to the signals received from the cobot, sensors and PLC control system.
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30

Gong, Dao, Wen Jing Sun, and Jin Song Zhou. "Study on Influences of Air Spring Failures on Ride Quality of High-Speed Railway Trains." Applied Mechanics and Materials 420 (September 2013): 9–15. http://dx.doi.org/10.4028/www.scientific.net/amm.420.9.

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A refined non-linear air spring model of railway vehicle model is established in this paper and the influences of different air spring failures on ride quality are studied. Results show that the orifice failure makes the air spring loses damping characteristics and deteriorates the vehicle ride quality; The failure of levelling valve has little influence on the ride quality when vehicle running on straight lines; The fracture of air spring diaphragm results in a sudden release of air, and car body secondary support disappears rapidly, excessive wheel unloading will happen and which can easily lead to derailment. In addition, the longer the leakage process, the less the influence on vehicle safety.
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31

Almeida, Alexsandro C. S., Tarlei A. Botrel, Steven R. Raine, Antonio P. de Camargo, Marinaldo F. Pinto, and Conan A. Salvador. "An irrigation controller mechanically actuated by soil-water tension: I - Design, development and laboratory evaluations." Revista Brasileira de Engenharia Agrícola e Ambiental 21, no. 6 (June 2017): 369–73. http://dx.doi.org/10.1590/1807-1929/agriambi.v21n6p369-373.

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ABSTRACT The objective of this study was to develop and evaluate an irrigation controller that was mechanically actuated by soil-water tension within laboratory conditions. The controller was designed and constructed using readily available hydraulic fittings and other componentry. The main components of the controller were a tensiometer; a rubber diaphragm that moves according to the variation in tension inside of the tensiometer; an activation rod that transfers the movement from diaphragm to the switch valve; and a steel spring that regulates the activation of soil water tension. Six irrigation controller samples were tested in the laboratory to evaluate the mechanical performance and component forces required to activate the controllers. The relationship between spring adjustment and soil water tension required to open the irrigation valve was linear with a gradient ranging from 1.10 to 1.41 kPa mm-1 and a coefficient of variation of 9.2%. However, differences observed in the activation of the soil water tension could also be reduced by individual controller calibration. The calibration of the soil water tension required to initiate irrigation was easily set by adjusting the spring. The proposed controller is functional, simple to use, can be easily adjusted, and does not require electricity to operate.
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32

Giuliodori, Mauricio J., Heidi L. Lujan, Hussein Janbaih, and Stephen E. DiCarlo. "How does a hopping kangaroo breathe?" Advances in Physiology Education 34, no. 4 (December 2010): 228–32. http://dx.doi.org/10.1152/advan.00050.2010.

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We developed a model to demonstrate how a hopping kangaroo breathes. Interestingly, a kangaroo uses less energy to breathe while hopping than while standing still. This occurs, in part, because rather than using muscle power to move air into and out of the lungs, air is pulled into (inspiration) and pushed out of (expiration) the lungs as the abdominal organs “flop” within the kangaroo's body. Specifically, as the kangaroo hops upward, the abdominal organs lag behind, and the insertion of the diaphragm is pulled toward its origin, flattening the dome and increasing the vertical dimension of the thoracic cavity (the thoracic cavity and lungs enlarge). Increasing the volume of the thoracic cavity reduces alveolar pressure below atmospheric pressure (barometric pressure), and air moves into the alveoli by bulk flow. In contrast, the impact of the organs against the diaphragm at each landing causes expiration. Specifically, upon landing, the abdominal organs flop into the diaphragm, causing it to return to its dome shape and decreasing the vertical dimension of the thoracic cavity. This compresses the alveolar gas volume and elevates alveolar pressure above barometric pressure, so air is expelled. To demonstrate this phenomenon, the plunger of a syringe model of the respiratory system was inserted through a compression spring. Holding the syringe and pressing the plunger firmly against a hard surface expels air from the lungs (the balloon within the syringe deflates) and compresses the spring. This models the kangaroo landing after a hop forward. Subsequently, the compression spring provides the energy for the “kangaroo” to “hop” forward upon the release of the syringe, and air enters the lungs (the balloon within the syringe inflates). The model accurately reflects how a hopping kangaroo breathes. A model was chosen to demonstrate this phenomenon because models engage and inspire students as well as significantly enhance student understanding.
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33

NODA, Satsuya, Toshio TAKAYAMA, and Toru OMATA. "Equalization of force resolutions for forceps force sensors with double diaphragm spring structure." Transactions of the JSME (in Japanese) 83, no. 855 (2017): 17–00253. http://dx.doi.org/10.1299/transjsme.17-00253.

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34

Ramdan, Yoki Andriawan, Dena Hendriana, Henry Nasution, and Gembong Baskoro. "Bench Set Impact Analysis on Fail-Safe Condition of Fail to Closed Type Control Valve with Spring-Diaphragm Actuator." Proceedings of The Conference on Management and Engineering in Industry 2, no. 1 (November 23, 2020): 11–14. http://dx.doi.org/10.33555/cmei.v2i1.35.

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Control valve is one of key elements in processing of a chemical industry and it is one of its important functions is as a flow control of chemical process. The accuracy of control valve opening or traveling is proportional to flow capacity. On the other hand, a leakage of a control valve on its failed position especially for Air to Open-Fail Closed (ATO-FC) type valve can become a disaster. One of critical parameters in Control Valve that impacts to performance and fail-safe position is Bench set range spring in valve’s actuator. This work analyzed this Bench set range impact to the fail-safe position. The force in spring is defined by control valve specification verified by force balance method of control valve. Then the impact of bench set range was analyzed by displacement of spring from spring force equation. At the end, the outcome is displacement data in correlation to the change of bench set range. It helps the repair technician on the maintenance workshop of permissible range when they adjust the bench set range by adjusting spring compression.
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35

Hiremath, Niranjan, and K. S. Tarun. "Static and modal analysis of diaphragm spring used in micro depth sensing indenting Machine." Materials Today: Proceedings 20 (2020): 161–66. http://dx.doi.org/10.1016/j.matpr.2019.10.098.

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36

Zhang, Y., and L. Huang. "Realization of Resonance of a Diaphragm at Any Desired Frequency." Journal of Mechanics 34, no. 1 (November 23, 2015): 29–34. http://dx.doi.org/10.1017/jmech.2015.105.

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AbstractIn noise control, the reactance of a mechanical system needs to be minimized while the resistance is chosen suitably. This work illustrates the possibility of and the ease at which such design tasks may be accomplished by utilizing strong electromechanical coupling. Moving-coil loudspeaker is chosen as the vehicle of illustration and it is considered as a simple spring-mass system when operated below its first diaphragm mode. It is shown that the system mechanical property may be tuned easily by a simple R-LC circuit. In addition to the assigned resonance frequency, there can be a maximum of two other resonances. It is argued that the ability to tune the system mechanical resonance to any frequency, such as the ones at very low frequencies, can be very useful for noise and vibration control applications.
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37

LEE, YOUNG-SHIN, TAIK-DONG CHO, SUNG-HO KO, HYUN-SEUNG LEE, and SUNG-KY SHIN. "STRUCTURAL STRESS ANALYSIS ON THE RUBBER DIAPHRAGM OF AIR-OPERATED VALVE." International Journal of Modern Physics B 20, no. 25n27 (October 30, 2006): 4565–70. http://dx.doi.org/10.1142/s0217979206041690.

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Air-operated valves are used extensively in the power-generation industry for process control and system isolation functions. A study on the prevention of damage of an air operated valve is very important. Specially, diaphragm in an actuator of an air-operated valve has the highest damage rate. In this study, the stress of diaphragm with thickness change is analyzed. For this analysis, four experiments were conducted to obtain material properties of rubber. A stress analysis is carried out by commercial FEM code, ANSYS 8.0. It is compared with tension test to verify finite element analysis. From the result of analysis, the maximum stress happened at flange edge part, and the maximum displacement happened between flange edge and spring support. This study also finds out effect of the thickness about variable thickness. Even if a section area is same, the maximum stress is varied with the thickness of edge side.
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Yıldız, Ali Rıza, Alper Karaduman, and Betül Sultan Yıldız. "Experimental and numerical fatigue-based design optimisation of clutch diaphragm spring in the automotive industry." International Journal of Vehicle Design 80, no. 2/3/4 (2019): 330. http://dx.doi.org/10.1504/ijvd.2019.10032345.

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Karaduman, Alper, Betül Sultan Yıldız, and Ali Rıza Yıldız. "Experimental and numerical fatigue-based design optimisation of clutch diaphragm spring in the automotive industry." International Journal of Vehicle Design 80, no. 2/3/4 (2019): 330. http://dx.doi.org/10.1504/ijvd.2019.109875.

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40

He, Yi Fang, Sha Nen Yu, Qun Li Shang, and Fu Kai Deng. "Dynamic Modelling and Simulation of Pneumatic Actuators." Applied Mechanics and Materials 88-89 (August 2011): 657–61. http://dx.doi.org/10.4028/www.scientific.net/amm.88-89.657.

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Pneumatic operated spring-diaphragm actuator is the most popular acting device in industrial applications. Precise modelling of pneumatic actuator continues to remain a major challenge because of its nonlinear characteristic. In this work, the characteristics of pneumatic actuator are analysed in details, and then the dynamic model, which considers effects of stem friction and compressibility of air, is developed. Computer simulation and experimental tests have been carried out on the developed model. The results show the model has a better performance.
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41

Karuc, Emre, and Melik Dolen. "Novel Touch-Trigger Probe for Coordinate Measuring Machines." Key Engineering Materials 450 (November 2010): 19–22. http://dx.doi.org/10.4028/www.scientific.net/kem.450.19.

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A novel touch-trigger probe system is proposed in this paper. The probe houses the stylus shaft on a special diaphragm spring that is exclusively designed with the utilization of Finite Element Analysis (FEA). In the probe system, Giant Magneto-Resistive (GMR) sensors are employed to measure the motion of the stylus shaft in the principal directions. The proposed (and implemented) probe is tested on a three-axis CNC electrical discharge machine (EDM) and the results acquired from those experiments are discussed. The preliminary work presented in this paper demonstrates the capabilities of GMR based probing technology in dimensional metrology.
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42

Zhu, Mao Tao, Feng Lu, Xue Lai Liu, and Jing Chen. "CFD Analysis of Clutch and Improvement." Advanced Materials Research 718-720 (July 2013): 1609–13. http://dx.doi.org/10.4028/www.scientific.net/amr.718-720.1609.

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Establish the simplified model of 215 clutch. Then made grid division and apply the boundary conditions to the model to do CFD analysis in ANSYS CFX module. According to the results, a new pressure plates structure is suggested. The gap between the supporting platforms against the diaphragm spring is designed into bevel and the number of the supporting platform is increased from 6 to 9. The result of the new structure shows that the air flows quickly than the original one. In other words, the convection between the air and the pressure plate is improved, and it contributes to reduce the temperature rise.
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43

Zhang, Tie Shan, Jing Hu, and Jin Shui Wu. "Study on Stress-Strain Model of Metallic Materials with Shot Peening Residual Stress." Advanced Materials Research 591-593 (November 2012): 1121–26. http://dx.doi.org/10.4028/www.scientific.net/amr.591-593.1121.

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Study on Stress-strain model of metallic materials with residual stress. First of all, Stress-strain model of metallic materials with residual stress was analyzed, then, derivation of a stress-strain model was done. Finally, according to the model of stress and strain analysis and derivation of results, taking diaphragm spring as an example, using methods of derivation of kinds of material obtained from this model portfolio, using finite element modeling tools, calculate the relationship between load and deformation. The test result indicated that, using the method of many kinds of material model combination can get the higher precision of calculation.
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44

Imai, Yuki, Tomonori Kawakami, and Claudio Cameselle. "Removing fluoride from hot spring wastewater by an electrolysis system with a perforated plate as a diaphragm." Cogent Engineering 7, no. 1 (January 1, 2020): 1720061. http://dx.doi.org/10.1080/23311916.2020.1720061.

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45

Mai, Khoi D., William F. Cofer, and Donald A. Bender. "Predicting Behavior of Steel-Clad, Wood-Framed Shear Walls under Cyclic Lateral Loading." Transactions of the ASABE 64, no. 2 (2021): 413–24. http://dx.doi.org/10.13031/trans.14250.

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HighlightsA finite element analysis (FEA) model was developed to predict behavior of steel-clad, wood-framed (SCWF) shear walls under cyclic loading.This FEA model will be useful in determining post-frame building response to seismic forces.The model will save time and money in developing design coefficients and planning experiments for SCWF shear walls.Abstract. This article presents finite element (FEA) model results of steel-clad, wood-framed (SCWF) shear walls under cyclic lateral loading. The shear wall model consists of beam elements to model framing members, equivalent orthotropic plane stress elements to model corrugated steel cladding, linear spring elements to model nail connectors between framing members, and nonlinear hysteresis spring elements to model screw connectors. Screw connectors attaching steel panels to wood framing and steel panels to steel panels at lap joints were tested under cyclic loading to provide the constitutive relationships needed. A modified Bouc-Wen-Barber-Noori (BWBN) model was developed to capture slack, pinching, and strength and stiffness degradation of screw connectors under cyclic loading. The finite element models were validated by comparing them with experimental test results of six different SCWF shear wall configurations. Predicted peak shear strengths for most load cycles were slightly higher than those from the experimental tests, especially for stitched shear walls. Visual inspection of the FEA predicted hysteretic load curves demonstrated that pinching, and strength and stiffness degradation were well captured. The results of this study demonstrate the utility of the FEA model for comparative studies of different SCWF shear wall constructions under cyclic lateral loading. Keywords: Cyclic lateral loading, Diaphragm design, Post-frame building, Steel-clad wood-frame diaphragm.
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Mannanov, Emil, Sergei Galunin, and Alexey Shatunov. "Numerical modeling of induction heating systems with load of azimuthal periodicity." E3S Web of Conferences 140 (2019): 10009. http://dx.doi.org/10.1051/e3sconf/201914010009.

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The paper presents developed numerical modelling methodology of induction heating problems of disks with a simple and complex profile in 3D for calculating the coupled electromagnetic and thermal tasks in the parametric design language (ANSYS APDL). We demonstrate that the developed tools can be used for products of various sizes, as well as for other metal engineering components using the example of local electromagnetic processing of a metal disk and a diaphragm spring. The authors used development for parametric research and design of induction heaters. The described methodology has particular specificity, due to which it is possible to expand the scope for a number of engineering units with azimuthal periodicity property.
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Panciera, R. J., S. A. Ewing, E. M. Johnson, B. J. Johnson, and D. L. Whitenack. "Eosinophilic Mediastinitis, Myositis, Pleuritis, and Pneumonia of Cattle Associated with Migration of First-Instar Larvae of Hypoderma Zineatum." Journal of Veterinary Diagnostic Investigation 5, no. 2 (April 1993): 226–31. http://dx.doi.org/10.1177/104063879300500214.

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Migrating first-instar larvae of Hypoderma Zineatum are a frequent cause of focal inflammatory lesions in connective tissues of the mediastinum, parietal and visceral pleura, peritoneum, lungs, diaphragm, and other loci. The lesions are characterized grossly by foci of yellowish or greenish gelatinous edema and microscopically by infiltration of the edematous tissue by a dense array of eosinophils. Lesions were recognized during a period of several weeks in late spring; the timing was attributable to events in the life cycle of the fly. The larvae, which were small (≍ 1 × 4.5 mm), transparent, and unobtrusive, were recovered from lesions in 12 of 20 cattle in which careful parasitologic examination was made.
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Shangguan, Wen-Bin, Xue-Lai Liu, Subhash Rakheja, and Qiufeng Hou. "Effective utilizing axial nonlinear characteristics of diaphragm spring and waveform plate to enhance breakaway performances of a clutch." Mechanical Systems and Signal Processing 125 (June 2019): 123–41. http://dx.doi.org/10.1016/j.ymssp.2018.05.060.

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49

Mai, Khoi D., William F. Cofer, and Donald A. Bender. "Quasi-Dynamic Implicit Finite Element Analysis of Steel-Clad, Wood-Framed Shear Walls." Transactions of the ASABE 63, no. 6 (2020): 1619–28. http://dx.doi.org/10.13031/trans.13846.

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HighlightsA new finite element modeling method was developed to predict performance of steel-clad, wood-framed diaphragms.The new method overcomes limitations of previous models and accurately predicts yielding and buckling behaviors.The new method will save time and money in developing design values for steel-clad, wood-frame diaphragms.Abstract. Various finite element codes and solution techniques have been developed for steel-clad, wood-framed (SCWF) shear walls over the past few decades. Most previous finite element models for SCWF shear walls under monotonic loading were based on a static implicit solution technique. Previous researchers stated that the static implicit technique showed promise for modeling SCWF diaphragms; however, the solution technique failed to converge to equilibrium as local instabilities in the form of snap-through buckling of steel cladding occurred or geometric nonlinearities were included in the model. In this study, a nonlinear quasi-dynamic implicit finite element analysis (FEA) of SCWF shear walls subjected to monotonic loading was developed to overcome the deficiencies of the static implicit approach. Three types of elements were used, including beam elements to model wood framing, shell elements to model steel cladding, and nonlinear spring elements to model connectors. Screw connector tests were conducted to obtain the load-displacement constitutive relationships needed for finite element models. Nine types of SCWF shear walls with and without lap seam stitching were tested to validate the finite element model. The ratios of predicted to test values for ultimate shear strength averaged 0.97 with a coefficient of variation (COV) of 8.1%, and the ratios for effective shear modulus averaged 1.13 with a COV of 30%. The quasi-dynamic implicit FEA is a significant improvement over previous static implicit techniques and should be a useful tool to predict the ultimate shear strength and effective shear modulus of SCWF shear walls under monotonic loading. Keywords: Diaphragm design, Post-frame building, Steel-clad wood-frame diaphragm.
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Liu, De Hui, Li Wen Liu, Gang Tang, Hong Min Wen, and Quan Guo Lu. "A Design and Research on GMM Precision Flow Pump." Applied Mechanics and Materials 602-605 (August 2014): 117–21. http://dx.doi.org/10.4028/www.scientific.net/amm.602-605.117.

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A new type of the precision flow pump is developed with the giant magnetostrictive materials as the driving source. Experiment has been conducted to test the performance of the pump with designed key components. The pump as the preloading mechanism, adopting an elastomer instead of a spring, not only simplifies the structure, but also improves the performance of the pump. A design is also made to some key components such as the giant magnetostrictive rod and driving coil. The result of experiment shows that the pump flow resolution records 1 ml/min~400ml/min and the maximum output pressure 0.6 MPa, which means the performance of this kind of pump is superior to ordinary diaphragm pumps.
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