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Numerical analysis of plasticity effects on fatigue growth of a short crack in a bainitic high strength bearing steel
KTH, Skolan för teknikvetenskap (SCI), Hållfasthetslära (Inst.).ORCID-id: 0000-0001-6896-1834
KTH, Skolan för teknikvetenskap (SCI), Hållfasthetslära (Inst.).
KTH, Skolan för teknikvetenskap (SCI), Hållfasthetslära (Inst.).
2016 (engelsk)Inngår i: International Journal of Fatigue, ISSN 0142-1123, E-ISSN 1879-3452, Vol. 92, s. 36-51Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Plasticity effects on fatigue growth were simulated for a physically short crack. The material description comprised the Drucker-Prager yield surface, non-associated flow rule and non-linear combined hardening. The simulated development of the growth limiting parameter agreed with the experimental crack behaviour with early rapid propagation followed by a transition to slow R-controlled growth. The crack was open to the tip without any crack face closure throughout all load cycles. Instead compressive residual stresses developed at the unloaded tip which supplied an explanation to the slow rate of the propagated short crack in this bainitic high strength bearing steel. The material's strength differential effect was the key difference explaining why compressive residual stresses instead of crack face closure was responsible for the short crack effect in this material.

sted, utgiver, år, opplag, sider
Elsevier, 2016. Vol. 92, s. 36-51
Emneord [en]
Crack simulation, Short crack, Closure effects, Crack propagation, Strength differential effect
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-193971DOI: 10.1016/j.ijfatigue.2016.06.030ISI: 000383930200005Scopus ID: 2-s2.0-84978049974OAI: oai:DiVA.org:kth-193971DiVA, id: diva2:1037689
Merknad

QC 20161017

Tilgjengelig fra: 2016-10-17 Laget: 2016-10-14 Sist oppdatert: 2017-11-29bibliografisk kontrollert

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