The paper analyzes multiaxial low cycle fatigue tests of notched specimens under proportional and non-proportional loading conditions. Strain controlled multiaxial low cycle fatigue tests were carried out using circumferentially notched round-bar specimens of type 316L stainless steel, with different stress concentration factors. The experimental results show that the crack initiation site is shifted from the notch tip. Based on this finding, a new model for life evaluation is proposed by taking into account the strain gradient in the proximity of the notch tip and the effective maximum strain range. The new model allows evaluating the fatigue life in a narrow scatter band.
Analysis of multiaxial low cycle fatigue of notched specimens for type 316L stainless steel under non-proportional loading / Gallo, P; Bressan, S; Morishita, T; Itoh, T; Berto, F. - In: THEORETICAL AND APPLIED FRACTURE MECHANICS. - ISSN 0167-8442. - 89:(2017), pp. 79-89. [10.1016/j.tafmec.2017.01.009]
Analysis of multiaxial low cycle fatigue of notched specimens for type 316L stainless steel under non-proportional loading
Gallo PPrimo
;
2017-01-01
Abstract
The paper analyzes multiaxial low cycle fatigue tests of notched specimens under proportional and non-proportional loading conditions. Strain controlled multiaxial low cycle fatigue tests were carried out using circumferentially notched round-bar specimens of type 316L stainless steel, with different stress concentration factors. The experimental results show that the crack initiation site is shifted from the notch tip. Based on this finding, a new model for life evaluation is proposed by taking into account the strain gradient in the proximity of the notch tip and the effective maximum strain range. The new model allows evaluating the fatigue life in a narrow scatter band.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione
