An experimental investigation on collective damage of short fatigue cracks for a stainless steel

IMECH-IR > 力学所知识产出(1956-2008)

	An experimental investigation on collective damage of short fatigue cracks for a stainless steel
	Hong YS(洪友士); Zheng XH; Liu N; Hong, YS (reprint author), Acad Sinica, Inst Mech, Lab Nonlinear Mech Continuous Media, Beijing 100080, Peoples R China.
会议录名称	PROGRESS IN MECHANICAL BEHAVIOUR OF MATERIALS (ICM8), VOL 1: FATIGUE AND FRACTURE
	1999
会议名称	8th International Conference on the Mechanical Behaviour of Materials (ICM8)
会议日期	MAY 16-21, 1999
会议地点	VICTORIA CONF CTR, VICTORIA, CANADA
摘要	Investigations have revealed that the formation and the development of shea fatigue cracks for some metallic materials present collective evolution characteristics. The cumulation of damage is associated with the initiation and the growth of a number of short cracks. The extent of fatigue damage depends on the cumulative behaviour of the total number of dispersed short cracks. This paper attempts to further investigate the collective damage of short fatigue cracks. The test material is a stainless steel The plate type specimen was used in push-pull fatigue testing. Two groups of specimens with different average grain diameters were prepared. The values of average grain diameter are 72 mu m and 207 mu m respectively. The evolutionary process of short cracks was obtained, showing the variation of the number of cracks per unit area with the normalized fatigue cycles and the normalized crack length. The evolutionary characteristics of specimens with large and small grain sizes were compared. The results show the specimen with smaller grain size is of better fatigue resistance in comparison to the specimen with large grain size. The experiments also show that shea crack regime takes up a predominant part of total fatigue life for the two groups of specimens. Based on the experimental observations, the relationship of the total number of short cracks versus normalized fatigue cycles is discussed.
WOS记录号	WOS:000089495400009
ISBN号	1-55058-163-5
收录类别	CPCI-S
语种	英语
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/58966
专题	力学所知识产出(1956-2008)
通讯作者	Hong, YS (reprint author), Acad Sinica, Inst Mech, Lab Nonlinear Mech Continuous Media, Beijing 100080, Peoples R China.
推荐引用方式 GB/T 7714	Hong YS,Zheng XH,Liu N,et al. An experimental investigation on collective damage of short fatigue cracks for a stainless steel[C]PROGRESS IN MECHANICAL BEHAVIOUR OF MATERIALS (ICM8), VOL 1: FATIGUE AND FRACTURE,1999.