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C(t) dominance of the mixed I/II creep crack: Part II. Extensive creep
Dai YW1; Liu YH2; Qin F1; Chao Y3; Qian GA(钱桂安)4
Source PublicationTHEORETICAL AND APPLIED FRACTURE MECHANICS
2020-04-01
Volume106Pages:21
ISSN0167-8442
Abstract

In the Part II of this paper, two typical specimens, i.e. compact tension shear (CTS) specimen and single edge notched (SEN) specimen, are selected as the numerical cases to analyse the dominance of C*-integral for mixed I/II creep crack under extensive creep. C*-integrals under different loading angles are presented with the same loading level for CTS specimens and SEN specimens. The equivalent creep zone enlarges with the decrease of the loading angle, which implies that the lower creep mixity occupies the larger equivalent creep zone under the same loading level. A normalized stress function method based on the FE calculation is given to obtain the distribution functions of mixed I/II creep crack tip fields. The comparisons of the FE solutions and HRR field are made for CTS and SEN specimens with various crack depths, and it can be found that the loss dominance of C(t) becomes remarkable under those cases close to mode I loading. The Q-parameter computed with the tangential stress is found to be invalid to be used as the constraint parameter for mixed mode creep crack under the extensive creep regime because of the influence of blunting effect. The stress triaxiality along maximum tangential stress (MTS) direction is suitable to be selected as the constraint parameter for the mixed I/II creep crack tip field. The stress triaxiality is independent on the radial distance even in a wide range away from creep crack tip along the MTS direction.

KeywordMixed I/II Creep crack C*-integral Constraint effect Stress triaxiality
DOI10.1016/j.tafmec.2020.102489
Indexed BySCI ; EI
Language英语
WOS IDWOS:000519657500028
WOS KeywordTIP FIELDS ; FRACTURE-BEHAVIOR ; FINITE-ELEMENT ; STRESS-FIELD ; MODE MIXITY ; GROWTH ; SPECIMENS ; SOLIDS
WOS Research AreaEngineering ; Mechanics
WOS SubjectEngineering, Mechanical ; Mechanics
Funding ProjectNational Natural Science Foundation of China[11902009] ; National Natural Science Foundation of China[11672009] ; National Natural Science Foundation of China[11672147] ; National Natural Science Foundation of China[11872364] ; Beijing Natural Science Foundation[2204074] ; Scientific Research Common Program of Beijing Municipal Commission of Education[KM202010005034] ; CAS Pioneer Hundred Talents Program
Funding OrganizationNational Natural Science Foundation of China ; Beijing Natural Science Foundation ; Scientific Research Common Program of Beijing Municipal Commission of Education ; CAS Pioneer Hundred Talents Program
Classification二类/Q1
Ranking4
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/81772
Collection非线性力学国家重点实验室
Corresponding AuthorDai YW; Liu YH; Qin F
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.Univ South Carolina, 300 Main St,Room A123, Columbia, SC 29208 USA
4.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Dai YW,Liu YH,Qin F,et al. C(t) dominance of the mixed I/II creep crack: Part II. Extensive creep[J]. THEORETICAL AND APPLIED FRACTURE MECHANICS,2020,106:21.
APA Dai YW,Liu YH,Qin F,Chao Y,&Qian GA.(2020).C(t) dominance of the mixed I/II creep crack: Part II. Extensive creep.THEORETICAL AND APPLIED FRACTURE MECHANICS,106,21.
MLA Dai YW,et al."C(t) dominance of the mixed I/II creep crack: Part II. Extensive creep".THEORETICAL AND APPLIED FRACTURE MECHANICS 106(2020):21.
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