Mechanism of effects of warm prestressing on apparent toughness of precracked specimens of HSLA steels

doi:10.1016/S0013-7944(01)00051-0

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	Mechanism of effects of warm prestressing on apparent toughness of precracked specimens of HSLA steels
	Chen, JH ; Wang, VB ; Wang, GZ ; Chen, X
刊名	ENGINEERING FRACTURE MECHANICS
	2001-10
卷号	68 期号:15 页码:1669-1686
关键词	warm prestressing fracture toughness HSLA steel critical crack opening displacement specimen finite element method calculation
ISSN号	0013-7944
DOI	10.1016/S0013-7944(01)00051-0
英文摘要	In this work, based on the results for: (1) variation of apparent toughness measured at low temperature in precracked HSLA steel specimens which had experienced various cycles of warm prestressing (WPS), (2) detailed observations and measurements of microscopic parameters on fracture surfaces. (3) comprehensive finite element method calculations, the mechanisms for the effects of WPS are analyzed. The effects of blunting of the precrack tip on reducing normal tensile stress by decreasing the stress triaxiality and strain developing in front of the tip are identified as the main factors improving the apparent toughness. The effects of residual compressive stress are separated from that of crack tip blunting and play a secondary role in the improvement of the apparent toughness of steel showing Bauschinger effect. The residual tensile stress is proved to be deleterious to the apparent toughness. (C) 2001 Elsevier Science Ltd. All rights reserved.
WOS研究方向	Mechanics
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000171352400004
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/35928]
专题	兰州理工大学
通讯作者	Chen, JH
作者单位	1.Gansu Univ Technol, Lanzhou 730050, Gansu, Peoples R China 2.Wuhan Iron & Steel Co, Wuhan 430080, Peoples R China
推荐引用方式 GB/T 7714	Chen, JH,Wang, VB,Wang, GZ,et al. Mechanism of effects of warm prestressing on apparent toughness of precracked specimens of HSLA steels[J]. ENGINEERING FRACTURE MECHANICS,2001,68(15):1669-1686.
APA	Chen, JH,Wang, VB,Wang, GZ,&Chen, X.(2001).Mechanism of effects of warm prestressing on apparent toughness of precracked specimens of HSLA steels.ENGINEERING FRACTURE MECHANICS,68(15),1669-1686.
MLA	Chen, JH,et al."Mechanism of effects of warm prestressing on apparent toughness of precracked specimens of HSLA steels".ENGINEERING FRACTURE MECHANICS 68.15(2001):1669-1686.