A Mode-III Crack Subjected to High-Strain Rates

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Abstract

THE DISPLACEMENT rate is given for a mode III crack growing in a steady state under dynamic conditions. The material is assumed to be visco-plastic and high strain rates are considered. A regular perturbation expansion is performed. First-order perturbing strains are, with one exception, square root singular near the crack-tip. For overstress exponents less, or equal to 2, a reasonably large region around the crack tip, i.e. > 10(-3) of the linear extent of the plastic zone, is dominated by the square root singular strain field. For an overstress exponent of 5/2 the region extends to about 10(-5) of the plastic zone size, which significantly reduces the possibilities of using the strength of the square root singular field as a fracture parameter. For the overstress exponent 3 the region vanishes.

Detaljer

Författare
Externa organisationer
  • Uppsala universitet
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Maskinteknik
Originalspråkengelska
Sidor (från-till)663-681
Antal sidor19
TidskriftJournal of the Mechanics and Physics of Solids
Volym40
Utgåva nummer3
StatusPublished - 1992
PublikationskategoriForskning
Peer review utfördJa
Externt publiceradJa

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