C(t) dominance of the mixed I/II creep crack: Part I. Transient creep

doi:10.1016/j.tafmec.2019.102314

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	C(t) dominance of the mixed I/II creep crack: Part I. Transient creep
	Chao YJ 1; Qian GA(钱桂安)2 ; Qin F 4; Liu YH 3; Dai YW 4
刊名	THEORETICAL AND APPLIED FRACTURE MECHANICS
	2019-10-01
卷号	103 页码:18
关键词	C(t)-integral Constraint effect T-stress Mixed I/II Transient creep
ISSN号	0167-8442
DOI	10.1016/j.tafmec.2019.102314
通讯作者	Dai, Yanwei(ywdai@bjut.edu.cn)
英文摘要	The mixed type crack is common to be found in engineering practices, however, the characteristics of mixed I/II creep crack tip fields have not been studied thoroughly. The aim of this part of the paper is to study the dominance of C(t)-integral for mixed I/II type creep crack tip field under transient creep. The boundary layer model is presented to investigate the dominance of C(t) under various mixed mode cases. For transient mixed mode creep crack under boundary layer model, C(t)-integral is related with the effective stress intensity factor (SIF). The near field of mixed creep crack tip field can be influenced by the remote T-stress greatly. The maximum tangential stress direction also can be influenced if the remote T-stress level is large enough. The loss dominance of the C(t) presents more remarkable under negative stress under transient creep. The relations of creep mixity factor with remote elastic mixity factor of the boundary layer model is also presented. The T-stress effects on the constraint parameter Q' and Q* are presented. The case that near the pure mode I case presents the most significant loss of constraint compared with the other mixed mode cases. The comparison between the sharp crack and blunted crack is made, and the sharpening effect is found be existed in the pure mode II case which reveals that the situation of mode II case may have a more severe damage process than that of mode I case.
分类号	二类/Q1
资助项目	China Postdoctoral Science Foundation[2019M650403] ; National Natural Science Foundation of China[11672009] ; National Natural Science Foundation of China[11672147]
WOS关键词	TIP FIELDS ; MODE-I ; FINITE-ELEMENT ; STRESS-FIELDS ; CONSTRAINT ; GROWTH ; SPECIMENS ; FAILURE ; MIXITY ; SIZE
WOS研究方向	Engineering ; Mechanics
语种	英语
WOS记录号	WOS:000489191500069
资助机构	China Postdoctoral Science Foundation ; National Natural Science Foundation of China
其他责任者	Dai, Yanwei
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/80658]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Univ South Carolina, 300 Main St,Room A123, Columbia, SC 29208 USA 2.Chinese Acad Sci, Inst Mech, Beijing, Peoples R China; 3.Tsinghua Univ, Dept Engn Mech, AML, Beijing 100084, Peoples R China; 4.Beijing Univ Technol, Coll Mech Engn & Appl Elect Technol, Beijing 100124, Peoples R China;
推荐引用方式 GB/T 7714	Chao YJ,Qian GA,Qin F,et al. C(t) dominance of the mixed I/II creep crack: Part I. Transient creep[J]. THEORETICAL AND APPLIED FRACTURE MECHANICS,2019,103:18.
APA	Chao YJ,钱桂安,Qin F,Liu YH,&Dai YW.(2019).C(t) dominance of the mixed I/II creep crack: Part I. Transient creep.THEORETICAL AND APPLIED FRACTURE MECHANICS,103,18.
MLA	Chao YJ,et al."C(t) dominance of the mixed I/II creep crack: Part I. Transient creep".THEORETICAL AND APPLIED FRACTURE MECHANICS 103(2019):18.