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A hybrid experimental-numerical study on the mechanism of three-dimensional dynamic fracture

Domenii publicaţii > Stiinte ingineresti + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Nishioka, T., Stan, F.

Editorial: Computer Modeling in Engineering & Science (CMES), Vol. 4, N0.1, p.119-139, 2003.

Rezumat:

In this paper we investigate the essentially unexplored area of three-dimensional dynamic fracture mechanics. The general objective sought by this investigation is the understanding of three-dimensional dynamic crack propagation and arrest, and, specifically, the effect that the specimen thickness has on the dynamic fracture mechanism. In particular, in the context of the present paper, it is intended to provide a summary of the achievements on the issue of three-dimensional dynamic fracture parameters. Furthermore, the behavior of the three-dimensional field near the crack front is investigated. The issue that will be addressed is the extent of regions over which plane stress and plane strain analyses provide a good approximation to the actual three-dimensional fields. The results obtained in this paper offer some important new insights into the effect of the specimen thickness on dynamic fracture.

Cuvinte cheie: Dynamic fracture, moving finite element method, dynamic J integral, dynamic stress intensity factor