(UM)
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Effect of residual stresses on fatigue strength on the smooth and splined parts of spring torsion bars [Elektronski vir]Močilnik, Vinko ; Predan, Jožef ; Gubeljak, NenadThe article discusses the effect of residual stresses on the fatigue strength of torsion bars by using the Dang Van fatigue criterion, at the stress concentration at the root of the tooth and at the ... smooth part of the torsion bar. Residual compressive stresses were induced on the surface during the technological processes by cold surface rolling and torsional pre-strain (pre-setting) to the plastic range, to increase the elastic linear range and to reduce the stress state during torsional loading. Normally, the stress reduction in the torsion bar at the mounting point is provided by the increased diameter of the splined part, compared to the smooth part of the torsion bar. In the case of a small difference between the diameter of the splined and the smooth parts of the torsion bar, a fatigue crack can be initiated in the notch, which causes the torsion bar to break during operation after a few hundred loading cycles. FEM stress analysis of a torsion bar was performed in the article. The actual residual stresses were measured by the non-destructive X-ray method at the place of stress concentration on the smooth and splined parts with a notch of the torsion bar, and Dang Van’s failure criterion was used to determine the fatigue behavior during torsional loading. Therefore, in the paper, the three methods were combined to determine the optimum lifetime of a torsion bar exposed to the required cyclic torque. The results of the analysis showed that the residual compressive stresses are useful up to a certain limit where the retarded fatigue crack initiation occurred, but a further increase of compressive stress caused an increase of the maximum shear stresses, which, in turn, caused the initiation of fatigue and failure at the splined part of the torsion bar before achieving the required number of cycles.Vir: Metals [Elektronski vir]. - ISSN 2075-4701 (Vol. 13, iss. 6, [article no.] 1004, May 2023, 16 str.)Vrsta gradiva - e-članek ; neleposlovje za odrasleLeto - 2023Jezik - angleškiCOBISS.SI-ID - 153271811
Avtor | Močilnik, Vinko ; Predan, Jožef ; Gubeljak, Nenad |
Naslov | Effect of residual stresses on fatigue strength on the smooth and splined parts of spring torsion bars [Elektronski vir] |
Datum objave | 2023-05-23 |
COBISS.SI-ID | 153271811 |
Verzija objave v repozitoriju | Založnikova različica |
Licenca objave v repozitoriju | Creative Commons Priznanje avtorstva 4.0 Mednarodna |
Embargo | Takojšnja javna objava |
Projekti, iz katerih je bila financirana objava
Naziv | Akronim | Številka projekta | Financer |
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Numerična in eksperimentalna analiza nelinearnih mehanskih sistemov | P2-0137-2022 |
Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije |
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https://dk.um.si/IzpisGradiva.php?id=86435 |
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Vrsta stroška | Skupni stroški | Plačila |
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APC – strošek objave članka | 1025.75 € |
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Ime baze podatkov | Področje | Leto |
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Povezave do osebnih bibliografij avtorjev | Povezave do podatkov o raziskovalcih v sistemu SICRIS |
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Močilnik, Vinko | 01379 |
Predan, Jožef | 21382 |
Gubeljak, Nenad | 10470 |
Vir: Osebne bibliografije
in: SICRIS
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