TY - JOUR
T1 - CED for an Interface Crack (2nd Report, A Study Based on Elastic Finite Element Analyses)
AU - Kwon, Oheon
AU - Utsunomiya, Takao
AU - Watanabe, Katsuhiko
PY - 1992
Y1 - 1992
N2 - The fracture parameter of an interface crack has yet to be established even for an elastic crack. The CED (crack energy density) was proposed as a crack parameter which enables us to be free from the restrictions on the constitutive equation, and it has been shown that it is applicable, in a unified way, to various kinds of crack behavior in a homogeneous material. Therefore, the CED may also be applicable to an interface crack. In the previous paper, the fundamentals of the CED for an interface crack were studied theoretically. In this paper, the elastic finite element analyses of a bimaterial specimen with a center crack in the interface are carried out under tension, and it is shown that the CED and its mode I and mode II contributions can be evaluated from the corresponding domain integrals virtually independent of the radius of curvature p at the notch (crack) tip over the some range of ρ and, therefore, these quantities are promising as crack parameters of an interface crack. Moreover, the substantial mode I and mode II contributions of the energy release rate introduced in the previous paper are evaluated and the relationships of the mode I and mode II contributions of the CED to them are discussed.
AB - The fracture parameter of an interface crack has yet to be established even for an elastic crack. The CED (crack energy density) was proposed as a crack parameter which enables us to be free from the restrictions on the constitutive equation, and it has been shown that it is applicable, in a unified way, to various kinds of crack behavior in a homogeneous material. Therefore, the CED may also be applicable to an interface crack. In the previous paper, the fundamentals of the CED for an interface crack were studied theoretically. In this paper, the elastic finite element analyses of a bimaterial specimen with a center crack in the interface are carried out under tension, and it is shown that the CED and its mode I and mode II contributions can be evaluated from the corresponding domain integrals virtually independent of the radius of curvature p at the notch (crack) tip over the some range of ρ and, therefore, these quantities are promising as crack parameters of an interface crack. Moreover, the substantial mode I and mode II contributions of the energy release rate introduced in the previous paper are evaluated and the relationships of the mode I and mode II contributions of the CED to them are discussed.
KW - Bimaterial
KW - CED
KW - Composite Material
KW - Energy Release Rate
KW - Finite Element Method
KW - Fracture Mechanics
KW - Interface Crack
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U2 - 10.1299/kikaia.58.2247
DO - 10.1299/kikaia.58.2247
M3 - Article
AN - SCOPUS:84998344285
VL - 58
SP - 2247
EP - 2253
JO - Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
JF - Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
SN - 0387-5008
IS - 556
ER -