Mechanism of effects of warm prestressing (WPS) on apparent toughness of notched steel specimens Part II: Calculations and analyses

doi:10.1023/A:1022251128300

	Mechanism of effects of warm prestressing (WPS) on apparent toughness of notched steel specimens Part II: Calculations and analyses
	Chen, JH; Wang, HJ ; Wang, GZ ; Dong, ZQ ; Chen, X
	2002-10
发表期刊	INTERNATIONAL JOURNAL OF FRACTURE
ISSN	0376-9429
卷号	117 期号:4 页码:375-392
摘要	Based on the experimental results of Part I of present work, this paper describes results of FEM calculations and analyses in details which identified that the effect of tensile-warm pre-stressing (WPS) on improvement of the apparent toughness of notched specimens results from three factors i.e. the residual compressive stress, macroscopic blunting of the original notch, and prestrain-deactivating cleavage initiation. The effects of three factors are separated and is effective for each at various extents of prestressing specified with a prestress-ratio, P-0/P-gy, defining the prestressing load P-0 as a fraction of general yield load P-gy. For values of prestress-ratio lower than 1.0, the residual compressive stress acts as the main factor. Between 1.0 to 1.5 of prestress-ratio values, in addition to the residual compressive stress the macroscopic blunting plays increasing role. The effect of the prestrain-deactivating cleavage initiation presents at the prestress-ratio P-0/P-gy greater than or equal to 1.2. In the case of compressive-warm prestressing, the apparent toughness is deteriorated due to the residual tensile stress. The effects of complex cycles of WPS, with various steps of loading and unloading different in signs, are determined mainly by the loading step just before the fracturing step.
关键词	warm prestressing fracture toughness notched specimen HSLA steel prestrain-deactivating
DOI	10.1023/A:1022251128300
收录类别	SCI ; SCIE
语种	英语
WOS研究方向	Materials Science ; Mechanics
WOS类目	Materials Science, Multidisciplinary ; Mechanics
WOS记录号	WOS:000181424200007
出版者	KLUWER ACADEMIC PUBL
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/35905
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 Gansu 730050, 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, HJ,Wang, GZ,et al. Mechanism of effects of warm prestressing (WPS) on apparent toughness of notched steel specimens Part II: Calculations and analyses[J]. INTERNATIONAL JOURNAL OF FRACTURE,2002,117(4):375-392.
APA	Chen, JH,Wang, HJ,Wang, GZ,Dong, ZQ,&Chen, X.(2002).Mechanism of effects of warm prestressing (WPS) on apparent toughness of notched steel specimens Part II: Calculations and analyses.INTERNATIONAL JOURNAL OF FRACTURE,117(4),375-392.
MLA	Chen, JH,et al."Mechanism of effects of warm prestressing (WPS) on apparent toughness of notched steel specimens Part II: Calculations and analyses".INTERNATIONAL JOURNAL OF FRACTURE 117.4(2002):375-392.

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