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Title:Compression pre-stress of tubular torsion springs
Authors:ID Močilnik, Vinko (Author)
ID Gubeljak, Nenad (Author)
ID Predan, Jožef (Author)
ID Flašker, Jože (Author)
Files:.pdf Tehnicki_vjesnik_2010_Mocilnik_et_al._Compression_pre-stress_of_tubular_torsion_springs.pdf (1,10 MB)
MD5: 2C949E1E6E25AF21B0996E324095CF67
PID: 20.500.12556/dkum/f6eacad6-0283-4add-98c2-83f2e4281a45
 
URL http://hrcak.srce.hr/59643
 
Language:English
Work type:Scientific work
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Abstract:This paper reports the results of a series of biaxial static compression and torsion experiments performed to evaluate the effects of static compression stress on the fatigue life of those smooth tubes made of high strength spring steel. The fatigue life of biaxial loaded springs depends, among others, on biaxial compression and torsion loading. A high shear loading ratio leads to low-cycle fatigue behaviour rather than high-cycle fatigue, because it was found that a crack was initiated at a local highly deformed area on surface of the specimen.The experimentally obtained results show a significant extension of fatigue strain life as a result of combining axial compression loading with torsion. Cracking behaviour was observed and it was noted that compression pre-stresses contribute to retardation of the fatigue crack initiation process and, consequently, contribute to the extension of fatigue life.
Keywords:fatigue, fatigue life, micro crack, multi axial stress state, pre-stressing, torsion, torsion bar springs, twist angle
Publication status:Published
Publication version:Version of Record
Year of publishing:2010
Number of pages:str. 307-315
Numbering:Letn. 17, št. 3
PID:20.500.12556/DKUM-66804 New window
ISSN:1330-3651
UDC:539.3:620.175.22
ISSN on article:1330-3651
COBISS.SI-ID:14522134 New window
NUK URN:URN:SI:UM:DK:FAWZGDZS
Publication date in DKUM:11.07.2017
Views:1241
Downloads:103
Metadata:XML DC-XML DC-RDF
Categories:Misc.
:
MOČILNIK, Vinko, GUBELJAK, Nenad, PREDAN, Jožef and FLAŠKER, Jože, 2010, Compression pre-stress of tubular torsion springs. Tehnički vjesnik : znanstveno-stručni časopis tehničkih fakulteta Sveučilišta u Osijeku [online]. 2010. Vol. 17, no. 3, p. 307–315. [Accessed 22 April 2025]. Retrieved from: https://dk.um.si/IzpisGradiva.php?lang=eng&id=66804
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Record is a part of a journal

Title:Tehnički vjesnik : znanstveno-stručni časopis tehničkih fakulteta Sveučilišta u Osijeku
Shortened title:Teh. vjesn. - Stroj. fak.
Publisher:Strojarski fakultet, Elektrotehnički fakultet, Građevinski fakultet
ISSN:1330-3651
COBISS.SI-ID:15346181 New window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:11.07.2017

Secondary language

Language:Croatian
Title:Tlačno prednaprezanje cjevastih torzijskih opruga
Abstract:U ovom se radu iznose rezultati niza eksperimenata dvoosnog statičkog tlačnog i torzijskog opterećenja kako bi se procijenilo djelovanje omjera tlačne napetosti na zamorni vijek trajanja cijevi napravljenih od visoko čvrstog čelika za opruge.Vijek trajanja dvoosno opterećenih opruga obzirom na zamor ovisi, između ostaloga, o biaksijalnom tlačnom i torzijskom opterećenju. Omjer opterećenja kod visokog smičnog naprezanja dovodi do nisko cikličkog više nego visoko cikličkog zamora jer se ustanovilo da se pukotina pojavila na lokalnom krajnje deformiranom dijelu na površini uzorka. Eksperimentalno dobiveni rezultati pokazuju značajan produžetak vijeka trajanja deformacije zbog zamora kao rezultat kombiniranja aksijalnog tlačnog i torzijskog opterećenja. Primijećena je pojava pukotina i zapaženo da tlačna prednaprezanja dovode do usporavanja procesa nastajanja zamornih pukotina i stoga doprinose produženju vijeka trajanja obzirom nazamor.
Keywords:utrujenost, mikro razpoke, večaksialno stanje napetosti, prednapenjanje, torzija, torzijske vzmeti, kot zvijanja


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