Fatigue crack growth in an aluminum alloy: Avalanches and coarse graining to growth laws

4Citations
Citations of this article
8Readers
Mendeley users who have this article in their library.

Abstract

In fatigue fracture the crack growth is slow and in many materials exhibits apparent self-similarity as expressed by the dependence of the growth velocity on a stress intensity factor that grows with the crack size. We study the intermittency of fatigue crack dynamics in aluminium alloys by optical tracking. A power-law distribution of crack tip jumps is found with an exponent close to two and a cutoff which increases with time or crack propagation. The cutoff is related to the crack velocity. We show how such a distribution evolves or coarse grains with the scale of observation or time window. The correlations of the crack propagation imply short-range memory effects in the underlying dynamics. Our results show universal features of fatigue cracks and how these lead to the crack growth and failure in material samples.

Cited by Powered by Scopus

Intermittent microplasticity in the presence of a complex microstructure

6Citations
N/AReaders
Get full text

Striation lines in intermittent fatigue crack growth in an Al alloy

1Citations
N/AReaders
Get full text

Numerical analysis of fatigue crack propagation using a coarse-grained molecular dynamics approach

0Citations
N/AReaders
Get full text

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Cite

CITATION STYLE

APA

Lomakin, I. V., Mäkinen, T., Widell, K., Savolainen, J., Coffeng, S., Koivisto, J., & Alava, M. J. (2021). Fatigue crack growth in an aluminum alloy: Avalanches and coarse graining to growth laws. Physical Review Research, 3(4). https://doi.org/10.1103/PhysRevResearch.3.L042029

Readers' Seniority

Tooltip

PhD / Post grad / Masters / Doc 3

60%

Lecturer / Post doc 1

20%

Researcher 1

20%

Readers' Discipline

Tooltip

Engineering 3

60%

Materials Science 2

40%

Article Metrics

Tooltip
Mentions
News Mentions: 1

Save time finding and organizing research with Mendeley

Sign up for free