How to reduce the duration of multiaxial fatigue tests under proportional service loadings
PALIN LUC, Thierry
Laboratoire Matériaux Endommagement Fiabilité et Ingénierie des Procédés [LAMEFIP]
Laboratoire Matériaux Endommagement Fiabilité et Ingénierie des Procédés [LAMEFIP]
BANVILLET, Alexis
Laboratoire Matériaux Endommagement Fiabilité et Ingénierie des Procédés [LAMEFIP]
Laboratoire Matériaux Endommagement Fiabilité et Ingénierie des Procédés [LAMEFIP]
PALIN LUC, Thierry
Laboratoire Matériaux Endommagement Fiabilité et Ingénierie des Procédés [LAMEFIP]
Laboratoire Matériaux Endommagement Fiabilité et Ingénierie des Procédés [LAMEFIP]
BANVILLET, Alexis
Laboratoire Matériaux Endommagement Fiabilité et Ingénierie des Procédés [LAMEFIP]
< Leer menos
Laboratoire Matériaux Endommagement Fiabilité et Ingénierie des Procédés [LAMEFIP]
Idioma
en
Article de revue
Este ítem está publicado en
International Journal of Fatigue. 2006, vol. 28, n° 5-6, p. 554–563
Elsevier
Resumen en inglés
This paper deals with a technique to transform a multiaxial stress and strain-time sequence (in service recorded) in a simplified sequence. This simplified sequence is shorter than the original one and equivalent in terms ...Leer más >
This paper deals with a technique to transform a multiaxial stress and strain-time sequence (in service recorded) in a simplified sequence. This simplified sequence is shorter than the original one and equivalent in terms of damage and lifetime: the number of simplified sequences to crack initiation is equal to the number of original sequences. The proposal is based on an energy threshold, below which no micro-crack can initiate or grow in the material. This technique was validated with real loading sequences recorded by strain gauges pasted on a car suspension arm. Fatigue tests were carried out on smooth specimens made of spheroidal graphite cast iron loaded in bending, in torsion and in combined bending and torsion. Experimental fatigue lives under the original sequence and under the simplified one are in very good correlation. Fatigue test duration is reduced up to a factor of 10 for the severe stress–strain sequences tested in this study.< Leer menos
Palabras clave en inglés
Multiaxial fatigue
Accelerated fatigue test
Load sequence
Energy
Threshold
Variable amplitude
Orígen
Importado de HalCentros de investigación