We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Generalization of Barenblatt's Cohesive Fracture Theory for Fractal Cracks.
- Authors
Yavari, Arash
- Abstract
In this paper, we generalize Barenblatt's cohesive fracture theory for fractal cracks. We discuss the difficulties of generalizing the concept of traction on a fractal surface. Borodich's modification of Griffith's theory for fractal cracks is reviewed. Irwin's driving force is generalized for fractal cracks and a fractal driving force (G[sub f]) is defined. It is shown that to generalize Barenblatt's theory for fractal cracks it is necessary to introduce a new quantity, D-fractal cohesive pseudo-stress. This new quantity is cohesive force per unit of a fractal measure. Fractal modulus of cohesion is seen to be a function of both the material and the fractal dimension of the crack. Equivalence of fractal Barenblatt's and Griffith's theories is discussed. It is seen that the order of stress singularity at the tip of a fractal crack cannot be obtained using modified Barenblatt's theory because this theory is a local theory and assumes the order of stress singularity a priori.
- Subjects
FRACTALS; MULTIFRACTALS
- Publication
Fractals, 2002, Vol 10, Issue 2, p189
- ISSN
0218-348X
- Publication type
Article
- DOI
10.1142/S0218348X02001075