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Journal articles on the topic 'Helical spring'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Muralidharan, M., R. Aravinth, J. Gafferkhan, and R. Gandhi. "Comparative Design and Analysis of Helical and Wave Spring." International Journal of Engineering & Technology 7, no. 3.34 (2018): 353. http://dx.doi.org/10.14419/ijet.v7i3.34.19224.

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This paper is a comparative between two springs such as helical and wave spring. Wave springs are precise flat wire compression springs that fit into assemblies that other springs cannot. These are used as an alternative spring for helical spring. Wave springs provide 50% reduction in spring height and axial space. They possess the same force and deflection as coil springs. They have reduced material requirements. They provide improved cost reduction. The Wave Spring has been subjected to Compression Test, Modal Analysis and Equivalent Elastic Strain Test and then compared to Helical Spring wh

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2

Khaykovich, Boris, Natalia Kozlova, Wonshik Choi, et al. "Thickness–radius relationship and spring constants of cholesterol helical ribbons." Proceedings of the National Academy of Sciences 106, no. 37 (2009): 15663–66. http://dx.doi.org/10.1073/pnas.0907795106.

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Using quantitative phase microscopy, we have discovered a quadratic relationship between the radius R and the thickness t of helical ribbons that form spontaneously in multicomponent cholesterol–surfactant mixtures. These helical ribbons may serve as mesoscopic springs to measure or to exert forces on nanoscale biological objects. The spring constants of these helices depend on their submicroscopic thickness. The quadratic relationship (R ∝ t2) between radius and thickness is a consequence of the crystal structure of the ribbons and enables a determination of the spring constant of any of our

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3

WANG, Yuan, Qingchun WANG, and Zehao SU. "Numerical Studies on the Stiffness of Arc Elliptical Cross-section Helical Spring Subjected to Circumference Force." Mechanics 27, no. 4 (2021): 327–34. http://dx.doi.org/10.5755/j02.mech.24907.

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Due to its excellent properties, elliptical cross-section helical spring has been widely used in automobile industry, such as valve spring, arc spring used in Dual Mass Flywheel and so on. Existing stiffness formulae of helical spring remain to be tested, and stiffness property of elliptical cross-section arc spring has been little studied. Hence, study on the stiffness of elliptical cross-section helical spring is significant in the development of elliptical cross-section helical spring. This paper proposes a method to study the stiffness property of elliptical cross-section helical spring th

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Razooqi, Ahmed Ibrahim, Hani Aziz Ameen, and Kadhim Mijbel Mashloosh. "Compression and impact characterization of helical and slotted cylinder springs." International Journal of Engineering & Technology 3, no. 2 (2014): 268. http://dx.doi.org/10.14419/ijet.v3i2.2492.

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Helical and slotted cylinder springs are indispensable elements in mechanical engineering. This paper investigates helical and slotted cylinder springs subjected to axial loads under static and dynamic conditions. The objective is to determine the stiffness of a circular cross-section helical coil compression spring and slotted cylinder springs with five sizes and dynamic characteristics. A theoretical and finite element models are developed and presented in order to describe the various steps undertaken to calculate the springs stiffnesses. Five cases of the springs geometric are presented. A

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5

BABASAHEB BHAGWAT1,, YOGESH. "Comparative Analysis of Two-Wheeler Suspension Helical Compression Spring for Steel and Composite Material at Different Loading Conditions." INTERNATIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 09, no. 05 (2025): 1–9. https://doi.org/10.55041/ijsrem46752.

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Abstract -The Springs are crucial suspension elements on automobiles which are necessary to minimize the vertical vibrations, impacts and bumps due to road irregularities and create a comfortable ride. Helical Compression springs are most commonly used for vehicle suspension and some industrial applications. The present work attempts to study the feasibility to select composite materials in the design of helical compression spring used in automobile suspension systems. The use of composite materials is increasing in the design of automobile components due to their light weight and costs. The o

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6

Kumbhar, S. V., A. M. Takale, A. H. Badiwale, A. D. Gawali, and B. S. Bhanase. "Design and Development of Helical Compression Spring Stiffness Testing Machine for I.C. Engine Valves with Stepper Motor by Using Computer Control." Asian Review of Mechanical Engineering 7, no. 2 (2018): 42–45. http://dx.doi.org/10.51983/arme-2018.7.2.2449.

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Helical compression springs play a vital role in IC Engine because of its stable function ability during the cyclic loading. This paper focuses on information on design and development of helical compression spring stiffness testing machine. Our aim is to design a spring stiffness testing machine with stepper motor by using computer control, which emphasizes to measure a stiffness of helical compression springs for I.C. Engines valves for the various fluctuating load. A tested spring installed in a machine which improves the performance of the machine and produces the more efficient and reliab

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7

Mahajan, Vikram, Purushottam Desale, and Pradeep Nande. "EFFECT OF STRESS RELIEVING TREATMENT ON HELICAL COMPRESSION SPRING MADE OF SPRING STEEL WIRE." International Journal of Innovative Research in Advanced Engineering 9, no. 12 (2022): 464–70. http://dx.doi.org/10.26562/ijirae.2022.v0912.02.

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Helical springs are one of the various forms of mechanical springs that are frequently used in car and mechanical systems. During the operation of cold coiling of helical springs, residual stresses are generated in spring. These stresses are relieved by stress relieving treatment, which is carried out just after the coiling. In stress relieving slight dimensional changes occurs. As per design of springs the wire diameter, coil diameter, number of turns and modulus of rigidity of spring wire play an important role. In these studies, experimental investigation is carried for change in outer diam

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8

Bagaria, William J., Ron Doerfler, and Leif Roschier. "Nomograms for the design of light weight hollow helical springs." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 231, no. 23 (2016): 4388–94. http://dx.doi.org/10.1177/0954406216665416.

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The helical spring is a widely used element in suspension systems. Traditionally, the springs have been wound from solid round wire. Significant weight savings can be achieved by fabricating helical springs from hollow tubing. For suspension systems, weight savings result in significant transportation fuel savings. This paper uses previously published equations to calculate the maximum shear stress and deflection of the hollow helical spring. Since the equations are complex, solving them on a computer or spreadsheet would require a trial-and-error method. As a design aid to avoid this problem,

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9

Li, Xue Bin, Xiao Long Chen, and Jian Zhang. "The Research on Working Performance of Annular Valve Spring Based on Solidworks." Applied Mechanics and Materials 440 (October 2013): 171–76. http://dx.doi.org/10.4028/www.scientific.net/amm.440.171.

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According to the problem of cylindrical helical compression springs deformation and fracture in the process of using. come up with a Solution that use conical helical spring instead of it, validate the improvement measure with relevant simulation and test analysis, draw a conclusion that the working performance of conical helical spring is better than the cylinder, this paper has some guiding effect on the selection of Annular valve spring.

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10

Mr, Vijay Vishnu Kumbhar. "ANALYSIS AND EXPERIMENTAL VALIDATION FOR BEHAVIOR (COMPRESSION, TEN SILE, FATIGUE ETC.)OF COMPOSITE MATERIAL HELI CAL COMPRESSIVE SPRING USED FOR FOUR WHEELER SUSPENSION SYSTEM." IJIERT - International Journal of Innovations in Engineering Research and Technology 3, no. 6 (2016): 1–15. https://doi.org/10.5281/zenodo.1463720.

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<strong>The Helical spring is used for suspension in automobile. The Helical spring absorbed the shocks and bump. The present study explores a bout experimental and computational analysis of helical spring used in automobile. This study concentrated on the use of composite material for manufacturing of helical spring. Overall this study compares the results obtained by experimental analysis of existing mild st eel material helical spring by using Universal Testing machine and composite material helical spring. The validation of experimental results is given by AN SYS computational results. Fin

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11

Nagata, Marisa, and Akira Saito. "Dynamics of a helical spring involving intermittent frictional contact with an oscillating barrier." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 268, no. 6 (2023): 2495–500. http://dx.doi.org/10.3397/in_2023_0365.

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This study concerns the transverse and longitudinal dynamics of helical springs. When a string is wrapped in helix to form a helical spring, its bulk longitudinal stiffness reduces. This leads to complicated dynamics of the spring in both transverse and longitudinal directions especially when it involves frictional contacts against a barrier. To simulate such dynamics, experiments and numerical simulations were conducted focusing on the intermittent contact between the helical spring and an oscillating barrier. First, to investigate the effects of longitudinal stiffness on the dynamics of the

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12

Nilesh.C. Ghuge, Dattatraya Palande, and Rakesh Shriwastva. "Experimental validation of multiaxial fatigue theories to estimate fatigue life of helical compression spring." Journal of Current Science and Technology 13, no. 2 (2023): 339–50. http://dx.doi.org/10.59796/jcst.v13n2.2023.1749.

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High-stress amplitudes and mean stress cycles are expected to be endured by helical compression springs utilized in a two-suspension wheeler's system. Fatigue failure of all these springs brings enormous eventual repair and replacement costs. A fatigue test is conducted to ascertain fatigue strength. The spring test plan is rather extensive due to the limited time and numerous test spring versions. Efforts were made to anticipate the helical spring's fatigue life. Multiaxial fatigue theories are examined in this work. The research paper aims to scrutinize the appropriate techniques that spring

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13

Chen, Ling, Liwei Wu, Hongjun Fu, and Youhong Tang. "Design and Performance Evaluation of Polymer Matrix Composite Helical Springs." Polymers 14, no. 18 (2022): 3900. http://dx.doi.org/10.3390/polym14183900.

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Helical springs are indispensable mechanical parts widely used in industry. Lightweight is one of the development trends of helical springs. In this study, three kinds of lightweight polymer matrix composite helical springs (PMCHSs) with unidirectional, multistrand, and wrapped textile structural reinforcement (PMCHS-U, PMCHS-M, and PMCHS-W) were designed, manufactured, and evaluated. The performance of these PMCHSs and the relationship between their performance and their corresponding polymer matrix composite spring wire rods (PMCRs) were studied through the torsion test of the PMCRs and the

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14

Kobelev, Vladimir. "Elastic–plastic deformation and residual stresses in helical springs." Multidiscipline Modeling in Materials and Structures 16, no. 3 (2019): 448–75. http://dx.doi.org/10.1108/mmms-04-2019-0085.

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Purpose The purpose of this paper is to develop the method for the calculation of residual stress and enduring deformation of helical springs. Design/methodology/approach For helical compression or tension springs, a spring wire is twisted. In the first case, the torsion of the straight bar with the circular cross-section is investigated, and, for derivations, the StVenant’s hypothesis is presumed. Analogously, for the torsion helical springs, the wire is in the state of flexure. In the second case, the bending of the straight bar with the rectangular cross-section is studied and the method is

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15

Jiang, W., W. K. Jones, T. L. Wang, and K. H. Wu. "Free Vibration of Helical Springs." Journal of Applied Mechanics 58, no. 1 (1991): 222–28. http://dx.doi.org/10.1115/1.2897154.

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This paper presents a theoretical investigation of the coupled extensional-torsional vibration of helical springs. The study shows that two types of periodic wave will propagate through the spring, one characterizing the extensional-compressive deformation and the other one, the torsional deformation. The shapes of the individual waves are simple, but the oscillation of the spring is complex due to the interaction and superposition of the component waves.

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16

Wang, Nan Nan, You Fu Hou, and Zu Zhi Tian. "Nonlinear Vibration Characteristics of Helical Spring." Applied Mechanics and Materials 29-32 (August 2010): 1317–22. http://dx.doi.org/10.4028/www.scientific.net/amm.29-32.1317.

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A helical spring has large deformation under the condition of near resonance, in order to obtain the nonlinear vibration characteristics, the single-integral constitutive relations of helical spring based on nonlinear theory are discussed firstly, then nonlinear dynamic characteristics of helical spring are analyzed based on finite element technology. Finally, the dynamic simulation associated with flexible characteristics for helical spring is studied in ADAMS. The results show that the maximum stress of helical spring appears at transition region between different radius which is consistent

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17

Li, Xiaoyong, Liang Liang, and Shijing Wu. "Analysis of mechanical behaviors of internal helically wound strand wires of stranded wire helical spring." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 6 (2017): 1009–19. http://dx.doi.org/10.1177/0954406217696517.

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A stranded wire helical spring is a cylindrical helical spring, which is usually composed of an optional core wire and several layers of twisted external wires. The mechanical behavior of the internal helically wound strand wire is critical to determining the spring performance. Based on the previous studies of the mechanical properties of wire rope, a mathematical model to calculate the curvature of the helically wound strand wires, twist, and contact force among the adjacent wires of strand wires spring is established when the spring is subjected to axial load. The proposed kinematics is bas

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18

Li, Wan Xia, Yang Kun Xu, Jing Cai, Chen Chen Zhang, and Jian Feng Ke. "Study on Helical Cylindrical Spring and Presentment of a New Design Method." Applied Mechanics and Materials 602-605 (August 2014): 428–31. http://dx.doi.org/10.4028/www.scientific.net/amm.602-605.428.

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Studied the main theory about helical cylindrical spring design, based on the existing theory,found the parameters that affect helical spring's stiffness, size, stroke, and also how much they effect the parameters. Draw the curve which can be a reference for helical cylindrical spring design, put forward a method of cylindrical helical spring design, which is according to the installation dimensions and working stroke and applicable to the design of cylindrical helical spring when is given workspace and stroke. Provided a new reference for the design of cylindrical helical spring, with importa

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19

Jain, Suresh, and Sanjay Singh. "WIRE DIAMETERS AND PERFORMANCE OPTIMIZATION OF INTELLIGENT HELICAL SPRINGS." American Journal of Interdisciplinary Innovations and Research 06, no. 05 (2024): 07–12. http://dx.doi.org/10.37547/tajiir/volume06issue05-02.

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Helical springs are fundamental components in various engineering applications, and optimizing their performance is crucial for enhancing overall system efficiency and reliability. This study investigates the impact of slender wire diameters on the performance of intelligent helical springs. Through experimental analysis and computational modeling, the mechanical behavior of helical springs with different wire diameters is examined, focusing on factors such as stiffness, fatigue life, and energy absorption capacity. The findings shed light on the trade-offs between wire diameter, spring compac

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20

Wen, Xianglong, Kai Fu, Yukuan Dou, Xu Xia, and Jinguang Zhang. "Stiffness and Frequency Response Characteristics of Glass Fiber Reinforced Plastic Wave Springs with Different Periods and Its Finite Element Analysis." Materials 15, no. 24 (2022): 9045. http://dx.doi.org/10.3390/ma15249045.

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Based on the stiffness theory of wave spring, this paper proposes the wave springs made of glass fiber reinforced plastic (GFRP) and investigates the effect of the number of periods on the GFRP wave springs’ stiffness and frequency response characteristics. First of all, five different periods of composite wave springs which have identical outside dimensions are designed. Afterwards, the load-displacement curves of the GFRP wave springs are obtained using a combination of experimental and finite element analysis (FEA). Finally, the frequency response characteristics of the GFRP wave springs ar

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21

Ren, Wanfei, Jinkai Xu, Zhongxu Lian, Xiaoqing Sun, Zhenming Xu, and Huadong Yu. "Localized electrodeposition micro additive manufacturing of pure copper microstructures." International Journal of Extreme Manufacturing 4, no. 1 (2021): 015101. http://dx.doi.org/10.1088/2631-7990/ac3963.

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Abstract The fabrication of pure copper microstructures with submicron resolution has found a host of applications, such as 5G communications and highly sensitive detection. The tiny and complex features of these structures can enhance device performance during high-frequency operation. However, manufacturing pure copper microstructures remain challenging. In this paper, we present localized electrochemical deposition micro additive manufacturing (LECD-μAM). This method combines localized electrochemical deposition (LECD) and closed-loop control of atomic force servo technology, which can effe

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22

Prieto, Leopoldo, Alejandro Quesada, Ana María Gómez Amador, and Vicente Díaz. "The General Dispersion Relation for the Vibration Modes of Helical Springs." Mathematics 10, no. 15 (2022): 2698. http://dx.doi.org/10.3390/math10152698.

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A system of mathematical equations was developed for the calculation of the natural frequencies of helical springs, its predictions being compared with finite element simulation with ANSYS®. Authors derive the general equations governing the helical spring vibration relative to the Frenet trihedral representing the normal, binormal and tangent unit vectors to the spring medium line. The dispersion relation has been obtained to model a wave traveling along the axis of the wire.

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23

Fann, Kaung-Jau, and Yu-Chung Tang. "Study on Imposing Initial Tension during Coiling Helical Tensile Springs." Key Engineering Materials 995 (December 3, 2024): 109–14. https://doi.org/10.4028/p-6qtx4n.

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The tension spring with initial tension is a coil spring with unique properties not found in other springs. It is often used to eliminate backlash, compensate for wear or thermal expansion, and hold parts in contact. While such tension springs have wide industrial applications, the academic literature on their properties and manufacturing is limited. Therefore, this study focuses on the computer numerical control (CNC) coiling machines commonly used to produce coil springs, and explores their process principles and the effects of settings on the geometry and initial tension of the springs thro

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Wang, Yu, Chunguang Zhang, Shangqing Li, Zhichao Li, Yingjiao Gong, and Jiarui Liu. "Analysis of stiffness characteristics of helical compression springs used in high-precision instruments." Journal of Physics: Conference Series 2845, no. 1 (2024): 012010. http://dx.doi.org/10.1088/1742-6596/2845/1/012010.

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Abstract Under working conditions of high-temperature, high-pressure, and strong corrosion, helical compression springs used in high-precision instruments need to maintain linear characteristics and impact resistance. To solve the problem of significantly reduced instrument accuracy due to the stiffness drift of current helical compression springs, compression stiffness characteristics are analyzed through compression tests and finite element simulations. The results indicate that the stiffness drift is caused by the sliding displacement of helical compression springs after being compressed an

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Patil, Sujit S., Subodh Karunasagar, and Shubham Shah. "Comparative Study of Helical Compression Suspension Spring for Different Materials." Asian Journal of Engineering and Applied Technology 5, no. 2 (2016): 22–28. http://dx.doi.org/10.51983/ajeat-2016.5.2.803.

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One of the major problems faced by automobile industries in few decades is the fuel efficiency which is related to the weight of the vehicle. This has led to more research in light weight materials with same mechanical properties as that of conventional materials. The composite materials are serving this need. In this study the helical compression steel springs are replaced with that of composite materials. The composite materials used are E-glass/Epoxy and Carbon fiber/Epoxy. Spring analysis is done with FEA and results are compared with steel spring. The springs are manufactured and the expe

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Zani, Nicola, and Luigi Solazzi. "Analysis and Prediction of Spring-Back in Cylindrical Helical Springs Using Analytical and Numerical Models." Eng 5, no. 3 (2024): 1696–707. http://dx.doi.org/10.3390/eng5030089.

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This research focuses on cylindrical helical springs with circular cross-sections made from carbon steel (SH 0.82% C) and stainless steel (AISI 302). The transformation from a linear bar to a circular spiral involves numerous factors such as material mechanical behavior, stress–strain relationships and residual stresses. This research investigates the spring-back phenomenon, which affects the final diameter of helical springs post-manufacture, using analytical, experimental and numerical methods. An analytical model, derived from the mechanical bending process, was proposed to predict spring-b

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27

Geinitz, Veronika, and Ulf Kletzin. "Heat Treatment of Cold Formed Springs Made from Oil Hardened and Tempered Spring Steel Wire." Materials Science Forum 892 (March 2017): 16–20. http://dx.doi.org/10.4028/www.scientific.net/msf.892.16.

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The heat treatment after cold forming is used to decrease the residual stresses of springs, but the mechanical characteristics of the spring steel wires alters, too. This presentation describes the influence of the heat treatment technology (oven equipment, temperature, duration,…) to the properties and quality of helical compression springs made from oil hardened and tempered spring steel wire.

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Modh, Mehul. "Comparative Analysis for Helical Spring and Belleville Spring Used in Aerosol Container Valve." Asian Review of Mechanical Engineering 1, no. 1 (2012): 7–12. http://dx.doi.org/10.51983/arme-2012.1.1.2514.

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Aerosol is to spray in fine particles from pressurized fluid. It is widely used in insect killer room freshener as well as perfumes. Various designs of such products are available and they are based on ergonomically as well as aesthetical consideration. In this paper, same consideration is used, model is made in Pro-e software and analysis is made in ANSYS software to justify the answer. Here, two different springs like Belleville as well as Conventional spring called “Helical Spring”. Due to application of same load on Belleville as well as helical spring, a graph of load versus deflection is

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Lin, Yuyi, and Albert P. Pisano. "The Differential Geometry of the General Helix as Applied to Mechanical Springs." Journal of Applied Mechanics 55, no. 4 (1988): 831–36. http://dx.doi.org/10.1115/1.3173729.

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In order to improve the performance of helical springs, such as increasing the fatigue life and suppressing resonance, variable pitch angle and variable helix radius may be incorporated into the helical spring geometry. Employing the tool of differential geometry, new and complete formulae of curvature, torsion, and spring force are derived. It is shown that these formulae are more general and accurate than Kelvin’s curvature and torsion formulae, than commonly used force formulae (Wahl, 1963). Possible simplifications to the complete formulae and the corresponding errors introduced are both d

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30

Liu, Feng Chen, and Lei Geng. "The Variation Coefficient Method for Reliability Sensitivity Analysis of Cylindrical Helical Spring." Applied Mechanics and Materials 55-57 (May 2011): 285–90. http://dx.doi.org/10.4028/www.scientific.net/amm.55-57.285.

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For mechanical reliability design with more random variable parameters, if the parameters are queued with their impact on the sensitivity of mechanical reliability, which will be as random variables with relatively high impact, while low-impact will be determined variables, thus would simplify reliability analysis due to the random variable number reduced. With cylindrical helical spring as an example, applying the variation coefficient method, the reliability sensitivity calculation of shear stress and deformation is discussed, and the impact on the reliability of cylindrical helical spring b

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31

Wagh, Hemant Krishnarao, Girish R. Desale, and Kartikeya Tripathi. "Role of helical spring locked washer in bolted joint analysis: a review." International Journal of Structural Integrity 7, no. 3 (2016): 346–58. http://dx.doi.org/10.1108/ijsi-04-2015-0012.

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Purpose – The purpose of this paper is to give a brief introduction of helical spring locked washer along with extensive literatures survey on role of helical spring locked washer in bolted joint analysis. It is very small component of bolted joint assembly, but it play vital role in holding the assembly components together. Helical shape of it produces spring effect in the assembly which is used for keeping the assembly in tension and that is lock the assembly under dynamic loading due to vibrations to avoid the accident. Design/methodology/approach – The critical literatures survey identifie

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Németh, Géza. "Possible materials and production technologies for a Special Purpose Helical Torsion Spring." Analecta Technica Szegedinensia 8, no. 2 (2014): 66–71. http://dx.doi.org/10.14232/analecta.2014.2.66-71.

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There are a huge number of ideas at the area of traction drives and also at that of the epicyclic or by other words, planetary drives. The majority of these designs, contain solely rigid wheels, and the contact forces that are proportional to the transmitted torque are produced by separate clamping devices. The author introduced an innovative design, which integrates some elements with merging functions. A part of the contacting rollers are elastic ones and their shape assures the requirement of uniform strength. The curiosities of the elastic rollers are their shapes. Observing both their sha

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Becker, L. E., and W. L. Cleghorn. "The Buckling Behavior of Rectangular-Bar Helical Compression Springs." Journal of Applied Mechanics 61, no. 2 (1994): 491–93. http://dx.doi.org/10.1115/1.2901479.

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Dai, Yupu, Joel Chong, Ling Chen, and Youhong Tang. "Evaluating Carbon Fibre-Reinforced Polymer Composite Helical Spring Performances Under Various Compression Angles." Fibers 13, no. 5 (2025): 65. https://doi.org/10.3390/fib13050065.

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Springs are widely used in industries such as aerospace and automotive. As the demand for emission reduction grows, the research on lightweight spring performance is becoming increasingly important. This study analyses the mechanical performance of triple-layer braided composite helical springs (TCHS) under various loads and compression angles. Firstly, the optimal high-temperature curing condition of the epoxy resin was determined through tensile and three-point bending analysis. Then, TCHS were fabricated based on optimal epoxy curing conditions, and multi-angle compression tests under diffe

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35

Mayers, Walter T. "Helical coil spring damper assemblies." Journal of the Acoustical Society of America 80, no. 5 (1986): 1564. http://dx.doi.org/10.1121/1.394345.

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Hara, T., T. Tanaka, T. Tanabe, X. M. Mare´chal, K. Kumagai, and H. Kitamura. "SPring-8 twin helical undulator." Journal of Synchrotron Radiation 5, no. 3 (1998): 426–27. http://dx.doi.org/10.1107/s0909049597015719.

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There are several ways of producing circularly polarized light, such as using asymmetric devices, crossed undulators etc. The SPring-8 helical undulator introduces a simple way of producing both horizontal and vertical fields in one undulator. All the magnet arrays are arranged above and below the plane of the electron orbit, so there is no limitation of access from the sides of the undulator. For the SPring-8 BL25SU, two helical undulators will be installed in tandem, and the helicity of the polarization can be switched at up to 10 Hz using five kicker magnets.

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Ge, Dali, Yuntong Dai, and Kai Li. "Self-Oscillating Liquid Crystal Elastomer Helical Spring Oscillator with Combined Tension and Torsion." Polymers 15, no. 15 (2023): 3294. http://dx.doi.org/10.3390/polym15153294.

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Self-oscillation is the autonomous maintenance of continuous periodic motion through energy absorption from non-periodic external stimuli, making it particularly attractive for fabricating soft robots, energy-absorbing devices, mass transport devices, and so on. Inspired by the self-oscillating system that presents high degrees of freedom and diverse complex oscillatory motions, we created a self-oscillating helical spring oscillator with combined tension and torsion under steady illumination, among which a mass block and a liquid crystal elastomer (LCE) helical spring made with LCE wire are i

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Spratt, Kyle S., and Jonathan S. Abel. "Measurement and modeling of an electromechanical spring reverb device." Journal of the Acoustical Society of America 152, no. 4 (2022): A220. http://dx.doi.org/10.1121/10.0016069.

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A spring reverb is an electromechanical device used to artificially reverberate an audio signal, i.e. to impart a sense of spaciousness to the audio signal, as if the sound were being emitted into a reverberant acoustic space. The device consists of a number of helical springs set into motion by electrically driven magnetized beads, with the elastic wave motion along the springs being analogous to acoustic waves propagating along the various dimensions of a room. While originally invented by the Hammond organ company to add a sense of spaciousness to the sound of their electric organs, spring

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Bohun, Lidia, Eduard Pleshakov, and Sergiy Shvachko. "Failure analysis of a motor vehicle suspension helical spring." Ukrainian journal of mechanical engineering and materials science 6, no. 1 (2020): 72–82. http://dx.doi.org/10.23939/ujmems2020.01.072.

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The purpose of this work is to reveal the cause of the failure of the motor vehicle rear suspension barrel-shaped spring with the progressive elasticity characteristic and predict measures to increase the lifetime of springs of this type. The fracture of the spring occurred on the middle coil, which operates under conditions of more severe stress in comparison with other coils. The chemical composition of the spring material, determined by X-ray fluorescence spectral and microstructural analyzes, corresponded to chromium-silicon steel 54SiCr6. In terms of structure and mechanical properties, t

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Kobelev, V. "Effect of static axial compression on the natural frequencies of helical springs." Multidiscipline Modeling in Materials and Structures 10, no. 3 (2014): 379–98. http://dx.doi.org/10.1108/mmms-12-2013-0078.

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Purpose – The purpose of this paper is to address the practically important problem of the load dependence of transverse vibrations for helical springs. At the beginning, the author develops the equations for transverse vibrations of the axially loaded helical springs. The method is based on the concept of an equivalent column. Second, the author reveals the effect of axial load on the fundamental frequency of transverse vibrations and derive the explicit formulas for this frequency. The fundamental natural frequency of the transverse vibrations of the spring depends on the variable length of

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Lin, Yuyi, and Albert P. Pisano. "General Dynamic Equations of Helical Springs With Static Solution and Experimental Verification." Journal of Applied Mechanics 54, no. 4 (1987): 910–17. http://dx.doi.org/10.1115/1.3173138.

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The general dynamic equations of helical compression springs with circular wire cross section, variable pitch angle, and variable helix radius are derived. The equations are formulated by Hamilton’s principle and a variational method. In contrast to previous studies, the effects of coil flexure bending, variable pitch angle and variable helix radius are taken into account. The general equations are shown to agree with dynamic equations found in literature when the general equations are reduced to simplified forms. For a specific helical spring and static loading, the equations are solved with

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Zhao, Jianwei, Zewen Gu, Quan Yang, Jian Shao, and Xiaonan Hou. "Dynamic Finite Element Model Based on Timoshenko Beam Theory for Simulating High-Speed Nonlinear Helical Springs." Sensors 23, no. 7 (2023): 3737. http://dx.doi.org/10.3390/s23073737.

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Helical springs with nonlinear geometric parameters nowadays have shown great advantages over classical linear springs, especially due to their superior performance in diminishing dynamic responses in high-speed situations. However, existing studies are mostly available for springs with linear properties, and the sole FE spring models using solid elements occupy significant computational resources. This study presents an FE spring model based on Timoshenko beam theory, which allows for high-speed dynamic simulations of nonlinear springs using a beehive valve spring sample. The dynamic results

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Zhang, Jian, Zhaohui Qi, Gang Wang, and Shudong Guo. "High-Efficiency Dynamic Modeling of a Helical Spring Element Based on the Geometrically Exact Beam Theory." Shock and Vibration 2020 (June 19, 2020): 1–14. http://dx.doi.org/10.1155/2020/8254606.

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This paper presents a modeling study of the dynamics of a helical spring element with variable pitch and radius considering both the static stiffness and dynamic response by using the geometrically exact beam theory. The geometrically exact beam theory based on the Euler–Bernoulli beam hypothesis is described, of which the shear deformations are ignored. Unlike the traditional spliced curved beam element method, the helical spring element is described with curvature vector and axial strain by establishing and spline-interpolating a function of the radius, the height, the polar angle, and the t

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Mr., Manish C. Bahalkar*1 Dr. Niranjan L. Shegokar2. "MODELLING & ANALYSIS OF HELICAL COIL SPRING UNDER DIFFERENT LOAD CONDITION BY USING FEM." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 6, no. 7 (2017): 444–51. https://doi.org/10.5281/zenodo.829049.

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Currently, the automobile industries have challenges of improvements in their product quality and its performance together with the weight reduction and cost reduction. Automobile industries directed their efforts towards the use of alternative materials which results in increase of strength to weight ratio. The use of composite materials is new trend in the design of automobile components due to their light weight and costs. The present work attempts to check the feasibility of select composite materials in the design of helical coil spring used in automobile suspension systems. The design of

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Baran, Robert, Krzysztof Michalczyk, and Mariusz Warzecha. "Experimental Analysis of Transverse Stiffness Distribution of Helical Compression Springs." Acta Mechanica et Automatica 17, no. 1 (2023): 95–103. http://dx.doi.org/10.2478/ama-2023-0011.

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Abstract This paper presents the results of an experimental analysis of the distribution of transverse stiffness of cylindrical compression helical springs with selected values of geometric parameters. The influence of the number of active coils and the design of the end coils on the transverse stiffness distribution was investigated. Experimental tests were carried out for 18 sets of spring samples that differed in the number of active coils, end-coil design and spring index, and three measurements were taken per sample, at two values of static axial deflection. The transverse stiffness in th

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Sarkate, Tukaram S. "A Finite Element Approach for Analysis of a Helical Coil Compression Spring Using CAE Tools." Applied Mechanics and Materials 330 (June 2013): 703–7. http://dx.doi.org/10.4028/www.scientific.net/amm.330.703.

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Springs is defined as an elastic body that can reserve high level of potential energy, have various important role in industries. Helical spring is the most common element that has been used in car suspension system. Spring steel is low carbon alloy, medium carbon steel or high carbon steel with very high yield stress related to light vehicle suspension system. In this research paper AISI 9255, (containing 1.5%-1.8% silicon, 0.7%-1.0%manganese and 0.52%-.6% carbon) under the effect of a uniform loading has been studied. .The FE model of the helical spring has been generated in Pro-E Wildfire 5

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Shalom, N., Akil Thomas, Bimal Biju, Mohammed P. M, and Muhammad Aslam S. "Design and Fabrication of Manual Spring Rolling Machine." International Journal for Research in Applied Science and Engineering Technology 11, no. 10 (2023): 42–47. http://dx.doi.org/10.22214/ijraset.2023.55937.

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Abstract: In order to produce closed and open coil helical springs, this study will explain the design and construction of a manual spring rolling machine using a straightforward mechanism setup. Manual labour is used to run this machine. With the help of this equipment, closed coil helical springs with various diameters and lengths may be produced. Metal wire is bent into a curved shape by rolling. The spherical object is produced by a spring roller shaft. On a rolling equipment that is powered or controlled manually, rolling can be done. From a shaft, it may create a spring. A shaft is a rev

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Růžička, M., and K. Doubrava. "Loading regimes and designing helical coiled springs for safe fatigue life." Research in Agricultural Engineering 51, No. 2 (2012): 50–55. http://dx.doi.org/10.17221/4902-rae.

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Springs are loaded by harmonic forces very often. High cycles fatigue damage and failure can be found during its service loading. This paper shortly describes stress concentration factor for helical springs on the inner diameter of the spring wire and its evaluation by using FE Method. These results have been compared with correction functions published in the literature. The fatigue safety factor has been derived for three typical loading regimes of springs. All cases are demonstrated in the Haigh diagram. It has been showed that loading cases with constant operational prestress give lowest s

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Lin, Yuyi, P. H. Hodges, and A. P. Pisano. "Optimal Design of Resonance Suppression Helical Springs." Journal of Mechanical Design 115, no. 3 (1993): 380–84. http://dx.doi.org/10.1115/1.2919202.

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Based on a previously developed and verified helical spring dynamic model, optimization and FFT subroutines have been added to the spring dynamic model as controlling and postprocessing units to form a computer-based optimal design tool. The objective function minimized is the amplitude of spring resonance. Design variables are the coefficients of a polynomial which describes the variation of the diameter of the spring wire along the spring helix. Constraints are the maximum fatigue stress at any location of the spring wire, the minimum and maximum wire diameter, and the maximum required sprin

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Vebil, Yildirim. "A Closed-Form Buckling Formula for Open-Coiled and Properly Supported Circular-Bar Helical Springs." Strojnícky casopis – Journal of Mechanical Engineering 68, no. 3 (2018): 33–48. http://dx.doi.org/10.2478/scjme-2018-0025.

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AbstractAs a continuation of the author’s previous studies on the buckling analysis of helical springs, a closed-form formula having been obtained with the help of the artificial neural network (ANN) is proposed and discussed in detail for the first time for a cylindrical close/open-coiled helical spring with fixed ends and having a solid circular section. As far as the author knows there is no such a formula in the open-literature to consider the effects of all stress resultants (torsional and bending moments, axial and shearing forces), large helix pitch angles together with the axial and sh

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