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C(t) dominance of the mixed I/II creep crack: Part I. Transient creep
Dai YW1; Liu YH2; Qin F1; Qian GA(钱桂安)3; Chao YJ4
Corresponding AuthorDai, Yanwei(ywdai@bjut.edu.cn)
Source PublicationTHEORETICAL AND APPLIED FRACTURE MECHANICS
2019-10-01
Volume103Pages:18
ISSN0167-8442
AbstractThe 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.
KeywordC(t)-integral Constraint effect T-stress Mixed I/II Transient creep
DOI10.1016/j.tafmec.2019.102314
Indexed BySCI ; EI
Language英语
WOS IDWOS:000489191500069
WOS KeywordTIP FIELDS ; MODE-I ; FINITE-ELEMENT ; STRESS-FIELDS ; CONSTRAINT ; GROWTH ; SPECIMENS ; FAILURE ; MIXITY ; SIZE
WOS Research AreaEngineering ; Mechanics
WOS SubjectEngineering, Mechanical ; Mechanics
Funding ProjectChina Postdoctoral Science Foundation[2019M650403] ; National Natural Science Foundation of China[11672009] ; National Natural Science Foundation of China[11672147]
Funding OrganizationChina Postdoctoral Science Foundation ; National Natural Science Foundation of China
Classification二类/Q1
Ranking3
ContributorDai, Yanwei
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/80659
Collection非线性力学国家重点实验室
Affiliation1.Beijing Univ Technol, Coll Mech Engn & Appl Elect Technol, Beijing 100124, Peoples R China;
2.Tsinghua Univ, Dept Engn Mech, AML, Beijing 100084, Peoples R China;
3.Chinese Acad Sci, Inst Mech, Beijing, Peoples R China;
4.Univ South Carolina, 300 Main St,Room A123, Columbia, SC 29208 USA
Recommended Citation
GB/T 7714
Dai YW,Liu YH,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 Dai YW,Liu YH,Qin F,钱桂安,&Chao YJ.(2019).C(t) dominance of the mixed I/II creep crack: Part I. Transient creep.THEORETICAL AND APPLIED FRACTURE MECHANICS,103,18.
MLA Dai YW,et al."C(t) dominance of the mixed I/II creep crack: Part I. Transient creep".THEORETICAL AND APPLIED FRACTURE MECHANICS 103(2019):18.
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