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Low-Cycle Fatigue Crack Growth in Ti-6242 at Elevated Temperature

Rebecka Brommesson (Institutionen för tillämpad mekanik, Material- och beräkningsmekanik) ; Magnus Hörnqvist (Institutionen för teknisk fysik, Materialens mikrostruktur ) ; Magnus Ekh (Institutionen för tillämpad mekanik, Material- och beräkningsmekanik)
Advanced Materials Research Vol. 891-892 (2014), p. 422-427.
[Konferensbidrag, refereegranskat]

During low-cycle fatigue test with smooth bars the number of cycles to initiation is commonly defined from a measured relative drop in aximum load. This criterion cannot be directly related to the actual measure of interest - the crack length. By relating data from controlled crack growth tests under low-cycle fatigue conditions of a high strength Titanium alloy at 350°C and numerical simulation of these tests, it is shown that it is possible to determine the relationship between load drop and crack length, provided that care is taken to consider all relevant aspects of the materials stress-strain response.

Nyckelord: Constitutive Model, Finite Element (FE), Low-Cycle Fatigue Crack Growth, Mean Stress Relaxation


Presented at the 11th International Fatigue Congress, Melbourne, 2014



Denna post skapades 2014-05-20. Senast ändrad 2017-03-08.
CPL Pubid: 198283

 

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Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Material- och beräkningsmekanik (2005-2017)
Institutionen för teknisk fysik, Materialens mikrostruktur (2012-2015)

Ämnesområden

Teknisk mekanik
Materialteknik
Konstruktionsmaterial

Chalmers infrastruktur