Article

Monotonic and Cyclic Crack Tip Plasticity

International Journal of Fatigue

L. Guerra Rosa; C. Moura Branco; J. C. Radon — 1984

Key information

Authors:

L. Guerra Rosa (Luís Manuel Guerra da Silva Rosa); C. Moura Branco (Carlos Augusto Gomes de Moura Branco); J. C. Radon

Published in

January 1984

Abstract

Monotonic and cyclic plastic zone sizes were measured in a medium strength ferrite-pearlite steel (BM 45) tested in fatigue at 25 Hz at room temperature. Two methods were applied: microhardness and the recently developed ‘fatigue in compression’ technique. The results obtained are discussed in terms of accuracy and reliability.The retardation effect due to overloads was also studied in the same material and is illustrated experimentally as a vs ΔK curve. This effect emphasizes the importance of an accurate evaluation of both the size and shape of the overall plastic zone. The shape and dimensions of the cyclic plastic zones seem to indicate that in ductile metals the steady state of fatigue crack growth occurs under plane strain conditions.

Publication details

Authors in the community:

Title of the publication container

International Journal of Fatigue

First page or article number

17

Last page

24

Volume

6

Issue

1

Fields of Science and Technology (FOS)

materials-engineering - Materials engineering

Publication language (ISO code)

eng - English

Rights type:

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