The influence of grain size variation on metal fatigue
Artikel i vetenskaplig tidskrift, 2005

The aim of the present study is to investigate the influence of the variation of metal grain sizes on fatigue lives. The grain structure is simulated from a Poisson–Voronoi model and the short crack growth model of Navarro and de los Rios is applied. The resulting fatigue life decreased with increasing component size, probably reflecting the fact that with increasing number of grains there is a larger probability of finding a large grain where the crack starts. The standard deviation of the logarithm of the lives was in the order of 0.2–0.4, i.e. the variation in grain size explains only part of the observed variance in real fatigue data.

Short crack

Grain structure

Voronoi tessellation

Författare

Jenny Jonasson

Göteborgs universitet

Chalmers, Matematiska vetenskaper, matematisk statistik

International Journal of Fatigue

Vol. 27 847-852

Ämneskategorier

Annan materialteknik

Sannolikhetsteori och statistik

Mer information

Skapat

2017-10-06