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

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

	Mechanism of effects of warm prestressing on apparent toughness of precracked specimens of HSLA steels
	Chen, JH; Wang, VB ; Wang, GZ ; Chen, X
	2001-10
发表期刊	ENGINEERING FRACTURE MECHANICS
ISSN	0013-7944
卷号	68 期号:15 页码:1669-1686
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.
关键词	warm prestressing fracture toughness HSLA steel critical crack opening displacement specimen finite element method calculation
DOI	10.1016/S0013-7944(01)00051-0
收录类别	SCI ; SCIE
语种	英语
WOS研究方向	Mechanics
WOS类目	Mechanics
WOS记录号	WOS:000171352400004
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	无
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/35928
专题	材料科学与工程学院_特聘教授组
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.

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