Study of load history effects on the high cycle fatigue properties of high-strength low-alloy steel from self-heating measurements - Archive ouverte HAL Access content directly
Journal Articles MATEC Web of Conferences Year : 2018

Study of load history effects on the high cycle fatigue properties of high-strength low-alloy steel from self-heating measurements

(1) , (1) , (1) , (2)
1
2

Abstract

In the context of high cycle fatigue (HCF), the experimental characterization of the fatigue properties is often performed by using specimens in a virgin state (i.e., without preliminary loading), and with a constant stress amplitude for each specimen. However, the load history applied to a real structure is more complex and the fatigue life prediction remains a difficult task because of the time dedicated to the classical fatigue tests (i.e., the specimen is loaded until failure) and the dispersion of fatigue lives. The load history effects on the HCF properties is characterized using an alternative method: self-heating measurements under cyclic loadings. This method is based on the observation of the mean steady state temperature evolution of a specimen under a successive series of cyclic loadings with increasing stress amplitude for each loading series. A probabilistic two-scale model was developed from the self-heating method able to predict HCF properties. Some self-heating tests are performed to study the influence of a load history effects. It seems that the plasticity is the most influential factor. So, the evolution of the plasticity is observed at the surface of the material under cyclic loading. There is a significant evolution in function of the plastic pre-strain.
Fichier principal
Vignette du fichier
matecconf_fatigue2018_14016.pdf (635.96 Ko) Télécharger le fichier
Origin : Publisher files allowed on an open archive
Loading...

Dates and versions

hal-01811074 , version 1 (08-06-2018)

Identifiers

Cite

Julien Louge, Cédric Doudard, Sylvain Calloch, Bastien Weber. Study of load history effects on the high cycle fatigue properties of high-strength low-alloy steel from self-heating measurements. MATEC Web of Conferences, 2018, 165, ⟨10.1051/matecconf/201816514016⟩. ⟨hal-01811074⟩
187 View
104 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More