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	Experimental evaluation of the size effect on the ductile and brittle fracture toughness of a steel pressure vessel
	Zhaoxi Wang ; Huiji Shi ; Jian Lu
	2010-10-12 ; 2010-10-12
关键词	Experimental/ brittle fracture ductile fracture fracture toughness plastic deformation size effect steel/ steel pressure vessel ductile fracture toughness brittle fracture toughness size effect nonstandard SENB specimens plastic deformation zone size plastic fracture strain small scale yielding conditions FeCJk/ A8140N Fatigue, embrittlement, and fracture A6220M Fatigue, brittleness, fracture, and cracks A8140L Deformation, plasticity and creep A6220F Deformation and plasticity/ Fe/ss C/ss
中文摘要	Experiments of fracture toughness with non-standard SENB specimens of five different thicknesses were performed to investigate the size effect on the ductile and brittle fracture for different temperatures. From the experimental results it is found that size effects both brittle and ductile fracture with the same trend but for different mechanical reasons. The ductile fracture toughness increases firstly with increased plastic deformation zone size and plastic fracture strain under general yielding conditions, and then drops down due to the plastic deformation zone size not changing much which is less than the residual ligament width and the increase of the proportion of the high stress triaxiality zone to the whole specimen. The fracture toughness of the lower shelf increases with increasing thickness of the plastic deformation zone size under small scale yielding conditions, and then drops down due to the increase of the high out-of-plane constraint.
语种	英语
出版者	Trans Tech Publications Ltd. ; Switzerland
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/79028]
专题	清华大学
推荐引用方式 GB/T 7714	Zhaoxi Wang,Huiji Shi,Jian Lu. Experimental evaluation of the size effect on the ductile and brittle fracture toughness of a steel pressure vessel[J],2010, 2010.
APA	Zhaoxi Wang,Huiji Shi,&Jian Lu.(2010).Experimental evaluation of the size effect on the ductile and brittle fracture toughness of a steel pressure vessel..
MLA	Zhaoxi Wang,et al."Experimental evaluation of the size effect on the ductile and brittle fracture toughness of a steel pressure vessel".(2010).

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