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Discussion: “Crack growth laws for a variety of viscoelastic solids using energy and COD fracture criteria,”

✍ Scribed by W. G. Knauss

Publisher
Springer Netherlands
Year
1979
Tongue
English
Weight
200 KB
Volume
15
Category
Article
ISSN
1573-2673

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✦ Synopsis

This paper, and two preceding it [1,2] all address the propagation of cracks in (linearly) viscoelastic solids.

Because they contain several conditions regarding material representation and crack geometry that seem unnecessarily restrictive, it appears appropriate to discuss the major results of these papers in the light of earlier publications [3-5], which presented identical results or contained the developments of the papers under discussion as specialized cases.

In view of the general title for the most recent paper, it seems furthermore instructive to include some clarifying comments on the state of our current knowledge regarding representation of the fracture process in polymers by models based on the linearized theory of viscoelasticity.

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Crack growth laws for a variety of visco
Crack growth laws for a variety of viscoelastic solids using energy and COD fracture criteria
✍ L. N. Cartney 📂 Article 📅 1979 🏛 Springer Netherlands 🌐 English ⚖ 471 KB

An energy balance fracture criterion and a constant crack opening displacement criterion are extensively discussed and rationalized in connection with the prediction of crack growth rates in linear viscoelastic materials. It is shown that both approaches lead to the same crack growth law when~small

Derivation of crack growth laws for line
Derivation of crack growth laws for linear viscoelastic solids based upon the concept of a fracture process zone
✍ L. N. McCartney 📂 Article 📅 1980 🏛 Springer Netherlands 🌐 English ⚖ 347 KB

The analysis presented in this paper derives, for a centre-crack embedded in a linear viscoelastic medium, crack growth equations which are based upon a modified energy balance relation. In contrast to an earlier approach a fracture process zone is introduced in the neighbourhood of the crack tip. I