Open AccessAnalysis of the fatigue strength under two load levels of a stainless steel based on energy dissipation
Author(s) -
B. Atzori,
Giovanni Meneghetti,
Mauro Ricotta
Publication year - 2011
Publication title -
frattura ed integrità strutturale
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.368
H-Index - 19
ISSN - 1971-8993
DOI - 10.3221/igf-esis.17.02
Subject(s) - amplitude , fatigue limit , dissipation , materials science , structural engineering , constant (computer programming) , work (physics) , vibration fatigue , stress (linguistics) , fatigue testing , composite material , engineering , physics , thermodynamics , linguistics , philosophy , quantum mechanics , computer science , programming language
In this paper the fatigue behaviour of a stainless steel AISI 304L is analysed. In the first part of thework the results obtained under constant amplitude fatigue are presented and synthesised in terms of bothstress amplitude and energy released to the surroundings as heat by a unit volume of material per cycle, Q. Thensome specimens have been fatigued in variable amplitude, two different load level tests: the first level was sethigher while the second was lower than the constant amplitude fatigue limit. The Q values, evaluated during thesecond part of the fatigue test, have been compared with those calculated under constant amplitude fatigue atthe same load level. The comparison allowed us to notice that the Q parameter is sensitive to the fatigue damageaccumulated by the material during the first part of the fatigue test