{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,27]],"date-time":"2026-03-27T00:05:15Z","timestamp":1774569915581,"version":"3.50.1"},"reference-count":31,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2021,1,22]],"date-time":"2021-01-22T00:00:00Z","timestamp":1611273600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>The paper presents a new constructive and functional solution of flexible coupling with bolts and nonmetallic intermediary elements. The bolts have a special shape in the sense that they have a milled area on a certain length equal to the width of the non-metallic element, a cylindrical area that reduces the stress concentrators at the diameter passages. The novelty of this coupling consists of the existence of one intermediary disk between two semi couplings (driver and driven semi couplings). This is fixed by the semi-coupling on the right side, the intermediary disc having milled four locations in which to mount the left, as the right has a metal plate with a special shape of eight metallic plates that are mounted with screws in the four milled places processed on the intermediate disc. The nonmetallic elements have various forms and can be made from different qualities of rubber mounted on the bolts. Eight milled bolts (four on each semi-coupling) allow the transmission of the torsion moment in both directions of rotation, in one direction becoming rigid and thus behaving like a safety coupling. Finite element method is used to obtain the mechanical response of this new type of coupling.<\/jats:p>","DOI":"10.3390\/sym13020171","type":"journal-article","created":{"date-parts":[[2021,1,25]],"date-time":"2021-01-25T12:28:31Z","timestamp":1611577711000},"page":"171","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["A New Optimized Solution for a Flexible Coupling with Bolts Used in the Mechanical Transmissions"],"prefix":"10.3390","volume":"13","author":[{"given":"Marilena","family":"Ghi\u0163escu","sequence":"first","affiliation":[{"name":"Department of Mechanical Engineering, Transilvania University of Brasov, B-dul Eroilor 29, 500036 Brasov, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ion-Marius","family":"Ghi\u0163escu","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, Transilvania University of Brasov, B-dul Eroilor 29, 500036 Brasov, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2255-7427","authenticated-orcid":false,"given":"Paul Nicolae","family":"Borza","sequence":"additional","affiliation":[{"name":"Department of Computer Science, Transilvania University of Brasov, B-dul Eroilor 29, 500036 Brasov, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8679-2579","authenticated-orcid":false,"given":"Sorin","family":"Vlase","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, Transilvania University of Brasov, B-dul Eroilor 29, 500036 Brasov, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,1,22]]},"reference":[{"key":"ref_1","unstructured":"Spotts, M., Shoup, T., and Hornberger, L. (2003). Design of Machine Elements, Pearson. [8th ed.]."},{"key":"ref_2","unstructured":"Oberg, E. (2020). Machinery\u2019s Handbook Toolbox, Industrial Press Inc.. [31st ed.]."},{"key":"ref_3","unstructured":"Budynas, R., and Nisbett, K. (2014). Mechanical Engineering Design, McGraw-Hill. [10th ed.]."},{"key":"ref_4","unstructured":"Parmlez, R. (2000). Mechanical Components, McGraw-Hill. [1st ed.]."},{"key":"ref_5","unstructured":"Mzsyka, D. (2010). Machines & Mechanisms: Applied Kinematic Analysis, Pearson. [4th ed.]."},{"key":"ref_6","unstructured":"Mott, R., Vavrek, E., and Wang, J. (2017). Machine Elements in Mechanical Design, Pearson. [6th ed.]."},{"key":"ref_7","unstructured":"Dieter, G., and Schmidt, L. (2012). Engineering Design, McGraw-Hill Education. [5th ed.]."},{"key":"ref_8","unstructured":"Norton, R. (2011). Design of Machinery, McGraw-Hill. [5th ed.]."},{"key":"ref_9","unstructured":"Radu, M. (2005). Theoretical and Experimental Studies as Concerns Couplings with Nonmetallic Elastic Elements. [Ph.D Thesis, Transylvania University of Brasov]."},{"key":"ref_10","unstructured":"Standard STAS 5982 (2020, October 20). Flexible Coupling with Bolts. Available online: https:\/\/www.etansari-mecanice-pompe.ro\/cat\/cuplaje-elastice-mecanice-permanente\/cuplaje-mobile-elastice-cu-bolturi-element-elastic-din-cauciuc\/."},{"key":"ref_11","unstructured":"Radu, M., and Chi\u015fu, E. (2004, January 27\u201329). Some aspects concerning calculus loads determination at the elastic couplings with nonmetallic elements. Proceedings of the International Conference TEHNONAV 2004, In Ovidius University Annals of Mechanical Engineering, Constanta, Romania."},{"key":"ref_12","unstructured":"(2020, October 20). Flexible Couplings with Rubber Studs. Available online: http:\/\/www.velhightech.com\/Documents\/ME8593%20Design%20of%20Machine%20Elements.pdf."},{"key":"ref_13","unstructured":"(2020, October 20). A Flexible Coupling with Stifts and Washers or Rubber Bushes. Available online: https:\/\/www.kdkce.edu.in\/upload\/\/Machine%20elements,%20Power%20Transmission%20Devices.pdf."},{"key":"ref_14","unstructured":"(2020, October 20). Flexible-Coupling. Available online: https:\/\/www.comintec.com\/en\/project\/flexible-coupling."},{"key":"ref_15","unstructured":"(2020, October 20). Guardian-Couplings. Available online: https:\/\/www.guardiancouplings.com\/-\/media\/Files\/Literature\/Brand\/guardian-couplings\/related\/brochures\/p-7733-gc.ashx."},{"key":"ref_16","unstructured":"Module 5 Couplings (2020, October 20). A Typical Flexible Coupling with Rubber Bushings. Available online: https:\/\/nptel.ac.in\/content\/storage2\/courses\/112105125\/pdf\/module-5%20lesson-2.pdf."},{"key":"ref_17","unstructured":"(2020, October 26). Rupex-Claw-Couplings. Available online: https:\/\/www.geartech.no\/en\/products\/transmission\/shaft-couplings\/rupex-claw-couplings\/."},{"key":"ref_18","unstructured":"(2020, October 26). RUPEX\u00ae Couplings. Available online: https:\/\/www.flender.com\/en\/Products\/Couplings\/RUPEX-Pin-and-Bush-Coupling\/p\/ATN03101."},{"key":"ref_19","unstructured":"(2020, October 26). Construction-Installation-and-Maintenance-of-Flexible-Couplings.pdf. Available online: https:\/\/practicalmaintenance.net\/wp-content\/uploads\/Construction-Installation-and-Maintenance-of-Flexible-Couplings.pdf."},{"key":"ref_20","unstructured":"(2020, October 25). A Flange Coupling and Non-Metallic Barrel Elements. Available online: https:\/\/www.researchgate.net\/publication\/331154663_Design_and_Analysis_of_Bushed_Pin_Flexible_Co.upling?enrichId=rgreq-10a027bed8d6a339a6fd0b9e3c43d0b4-XXX&enrichSource=Y292ZXJQYWdlOzMzMTE1NDY2MztBUzo3MjY5OTMwMTY0Nzk3NDRAMTU1MDM0MDA1MDY4Ng%3D%3D&el=1_x_2&_esc=publicationCoverPdf."},{"key":"ref_21","first-page":"38","article-title":"Design and Analysis of Bushed Pin Flexible Coupling","volume":"5","author":"Timur","year":"2017","journal-title":"IJARESM"},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Elaziz, A.E.M., Marin, M., and Othman, M.I.A. (2019). On the effect of Thomson and initial stress in a thermo-porous elastic solid under GN electromagnetic theory. Symmetry, 11.","DOI":"10.3390\/sym11030413"},{"key":"ref_23","unstructured":"(2020, November 10). Patent SU 1262417 A1. Elastic Coupling with Rubber-Bushed Studs. Available online: https:\/\/worldwide.espacenet.com\/publicationDetails\/biblio?II=15&ND=3&adjacent=true&locale=en_EP&FT=D&date=19861007&CC=SU&NR=1262147A1&KC=A1."},{"key":"ref_24","unstructured":"(2020, November 11). Patent CN 103925303\/16.07.2014. Rubber-Cushioned Sleeve Bearing Coupling Fast to Replace. Patent CN 106321676A\u00b72017-01-11. Elastic Coupling. Available online: https:\/\/worldwide.espacenet.com\/patent\/search\/family\/057733218\/publication\/CN106321676A?q=elastic%20coupling%20rubber%20bolt."},{"key":"ref_25","unstructured":"Hangzhou, Xin Kai Transmission Machinery Co Ltd (2014). Maritime Coupling. (CN 203847581U), Utility Model."},{"key":"ref_26","unstructured":"Herwarth Reich (1960). Elastic Coupling. (2924082A), U.S. Patent."},{"key":"ref_27","unstructured":"Prod\u0103nescu, G.S., and Iliuc, I. (2001). Elastic Coupling, with Elastic, Non-Metallic, Radial, Discrete Elements. (RO 116430 (B1))."},{"key":"ref_28","unstructured":"(2020, November 20). Autodesk Mechanical Desktop 6 Power Pack. Available online: https:\/\/softadvice.informer.com\/Autocad_Mechanical_6_Power_Pack.html."},{"key":"ref_29","unstructured":"Catia\u00aeSoftware Corporation (2016). Catia\u00ae Version 8, Copyright \u00a9 Dassault Systemes."},{"key":"ref_30","unstructured":"Hughes, T.J.R. (2000). Finite Element Method: Linear Static and Dynamic Finite Element Analysis, Dover Publication."},{"key":"ref_31","first-page":"782","article-title":"Finite element method analysis of some fibre-reinforced composite laminates","volume":"5","author":"Draghicescu","year":"2011","journal-title":"Optoelectron. Adv. Mater. Rapid Commun."}],"container-title":["Symmetry"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2073-8994\/13\/2\/171\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T05:13:58Z","timestamp":1760159638000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2073-8994\/13\/2\/171"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,1,22]]},"references-count":31,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2021,2]]}},"alternative-id":["sym13020171"],"URL":"https:\/\/doi.org\/10.3390\/sym13020171","relation":{},"ISSN":["2073-8994"],"issn-type":[{"value":"2073-8994","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,1,22]]}}}