抄録
In the unloading compliance method developed for clamped single edge tension (SE(T)) specimens, six crack mouth opening displacement (CMOD)-based compliance equations (i.e. a/W = f(BCE')) were proposed for the crack length evaluation without clearly clarifying the corresponding predictive accuracies. In addition, the effective elastic modulus (Ee) that reflects the actual state of stress should also be introduced in the crack length evaluation for SE(T) specimens, because the actual state of stress in the remaining ligament of the test specimen is neither plane stress (E) nor plane strain (E'). In this study, two-dimensional (2D) plane strain and three-dimensional (3D) finite element analyses (FEAs) are carried out to investigate predictive accuracies of the six compliance equations. In both 2D and 3D FEA, specimens with a wide range of crack lengths and geometric configurations are included. For a given specimen, the value of Ee that presents the equivalent stress state in the remaining ligament is calculated on the basis of 3D FEA data. A set of formulae for the clamped SE(T) specimen is proposed that allows to evaluate Ee from the corresponding CMOD compliance. This approach is verified using numerical data. The observations of the numerical verification suggest that the use of Ee instead of E or E' in CMOD-based compliance equations markedly improves the accuracy of the predicted crack length for clamped SE(T) specimens.
| 元の言語 | English |
|---|---|
| ページ（範囲） | 315-329 |
| ページ数 | 15 |
| ジャーナル | Fatigue and Fracture of Engineering Materials and Structures |
| 巻 | 38 |
| 発行部数 | 3 |
| DOI | |
| 出版物ステータス | Published - 2015 3 1 |
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ASJC Scopus subject areas
- Mechanical Engineering
- Mechanics of Materials
- Materials Science(all)
これを引用
Finite element analysis of crack mouth opening displacement compliance in crack length evaluation for clamped single edge tension specimens. / Wang, E.; Omiya, Masaki.
：: Fatigue and Fracture of Engineering Materials and Structures, 巻 38, 番号 3, 01.03.2015, p. 315-329.研究成果: Article
}
TY - JOUR
T1 - Finite element analysis of crack mouth opening displacement compliance in crack length evaluation for clamped single edge tension specimens
AU - Wang, E.
AU - Omiya, Masaki
PY - 2015/3/1
Y1 - 2015/3/1
N2 - In the unloading compliance method developed for clamped single edge tension (SE(T)) specimens, six crack mouth opening displacement (CMOD)-based compliance equations (i.e. a/W = f(BCE')) were proposed for the crack length evaluation without clearly clarifying the corresponding predictive accuracies. In addition, the effective elastic modulus (Ee) that reflects the actual state of stress should also be introduced in the crack length evaluation for SE(T) specimens, because the actual state of stress in the remaining ligament of the test specimen is neither plane stress (E) nor plane strain (E'). In this study, two-dimensional (2D) plane strain and three-dimensional (3D) finite element analyses (FEAs) are carried out to investigate predictive accuracies of the six compliance equations. In both 2D and 3D FEA, specimens with a wide range of crack lengths and geometric configurations are included. For a given specimen, the value of Ee that presents the equivalent stress state in the remaining ligament is calculated on the basis of 3D FEA data. A set of formulae for the clamped SE(T) specimen is proposed that allows to evaluate Ee from the corresponding CMOD compliance. This approach is verified using numerical data. The observations of the numerical verification suggest that the use of Ee instead of E or E' in CMOD-based compliance equations markedly improves the accuracy of the predicted crack length for clamped SE(T) specimens.
AB - In the unloading compliance method developed for clamped single edge tension (SE(T)) specimens, six crack mouth opening displacement (CMOD)-based compliance equations (i.e. a/W = f(BCE')) were proposed for the crack length evaluation without clearly clarifying the corresponding predictive accuracies. In addition, the effective elastic modulus (Ee) that reflects the actual state of stress should also be introduced in the crack length evaluation for SE(T) specimens, because the actual state of stress in the remaining ligament of the test specimen is neither plane stress (E) nor plane strain (E'). In this study, two-dimensional (2D) plane strain and three-dimensional (3D) finite element analyses (FEAs) are carried out to investigate predictive accuracies of the six compliance equations. In both 2D and 3D FEA, specimens with a wide range of crack lengths and geometric configurations are included. For a given specimen, the value of Ee that presents the equivalent stress state in the remaining ligament is calculated on the basis of 3D FEA data. A set of formulae for the clamped SE(T) specimen is proposed that allows to evaluate Ee from the corresponding CMOD compliance. This approach is verified using numerical data. The observations of the numerical verification suggest that the use of Ee instead of E or E' in CMOD-based compliance equations markedly improves the accuracy of the predicted crack length for clamped SE(T) specimens.
KW - BS 8571
KW - compliance equation
KW - crack length measurement
KW - effective elastic modulus (E)
KW - finite element analysis (FEA)
KW - J-integral (J)
UR - http://www.scopus.com/inward/record.url?scp=84921904477&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84921904477&partnerID=8YFLogxK
U2 - 10.1111/ffe.12233
DO - 10.1111/ffe.12233
M3 - Article
AN - SCOPUS:84921904477
VL - 38
SP - 315
EP - 329
JO - Fatigue and Fracture of Engineering Materials and Structures
JF - Fatigue and Fracture of Engineering Materials and Structures
SN - 8756-758X
IS - 3
ER -