Study of Fatigue Damage on Low Cycle Fatigue

Autor:	Futoshi Nishimura, Kazuhiro Morino, Hironobu Nisitani
Rok vydání:	1999
Předmět:	Materials science Tensile fracture business.industry Mechanical Engineering Fatigue damage Structural engineering Work hardening Fatigue limit Mechanics of Materials Ultimate tensile strength Fracture (geology) General Materials Science Low-cycle fatigue Composite material business Ductility
Zdroj:	TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A. 65:1087-1092
ISSN:	1884-8338 0387-5008
Popis:	To study fatigue damage on low cycle fatigue, tensile tests after fatigue were carried out using cylindrical specimens, and the relationship between the change of residual fracture ductility and the cycle ratio was investigated. The main results obtained are as follows : (1) Until the last stage of fatigue life (N/Nf=0.9 ; crack length 1.5 mm), the residual fracture ductility eFR did not decreased remarkably and the tensile fracture mode did not vary from cup & cone type. These results differ from previous studies using hourglass specimens. (2) The exhaustion of eFR is caused by two factors : One is the internal damage due to cyclic work hardening and the other is the surface damage due to small cracks. The degree of these damages is bath small. (3) Most of the fatigue damage on low cycle fatigue depends on the length of surface cracks.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::19404b6b673a20731b6eeb09e2d532ae https://doi.org/10.1299/kikaia.65.1087 Zobrazit plný text záznamu