Finite element analysis of interface crack in bimaterial media using cohesive force model

Masaki Omiya, Kikuo Kishimoto, Toshikazu Shibuya

研究成果: Article査読

2 被引用数 (Scopus)

抄録

The intent of this paper is to investigate mixed mode interface fracture toughness Jc. Many workers have shown by experiments that the interface fracture toughness depends on the mode mixity. However, the definition of the interface stress intensity factor is not clarified and therefore the mode mixity varies with the characteristic length L of the interface stress intensity factor. To evaluate the strength of an interface, it is important to model the fracture behavior of the interface. The cohesive force model is a direct way to represent the interface nonlinear properties. Based on the internal variable theory of thermodynamics, a continuum interface constitutive relation between interface traction and interface separation has been developed. In this paper, we apply this constitutive model to the interface crack. The interface fracture toughness is analyzed for a wide range of bimaterial constant by Finite Element Method. The results show that the fracture boundary curve is elliptical shape and changes with the ratio of the Young's modulus. The interface fracture toughness is strongly influenced by the mode mixity. However, if the characteristic length L of the interface stress intensity factor is chosen suitably, the intrinsic fracture criterion can be derived.

本文言語English
ページ(範囲)532-539
ページ数8
ジャーナルNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
66
643
DOI
出版ステータスPublished - 2000
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 材料力学
  • 機械工学

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