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International Journal of Fracture

, Volume 90, Issue 1–2, pp 103–118 | Cite as

Loading Rates and the Dynamic Initiation Toughness in Brittle Solids

  • C. Liu
  • W.G. Knauss
  • A.J. Rosakis
Article

Abstract

The experimentally determined marked rise of the stress intensity factor required to initiate crack propagation in brittle solids under variably high loading rates, is analyzed. This problem of fracture initiation at the tip of a crack is considered in terms of activating a flaw at some distance away from the tip. By using a semi-infinite crack in an unbounded two-dimensional solid subjected to spatially uniform but temporally varying crack-face pressure, we consider the evolution of stress at the failure initiation site. Fracture initiation is assumed synonymous with attaining a critical stress at the fracture site. The results conform to typical experimental data of dynamic crack initiation in brittle solids.

Dynamics fracture initiation toughness brittle fracture. 

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Copyright information

© Kluwer Academic Publishers 1998

Authors and Affiliations

  • C. Liu
    • 1
  • W.G. Knauss
    • 2
  • A.J. Rosakis
    • 2
  1. 1.Materials Science and Technology Division, MS-G755Los Alamos National LaboratoryLos AlamosU.S.A
  2. 2.Graduate Aeronautical Laboratories, 105-50California Institute of TechnologyPasadenaU.S.A

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