Journal of the University of Chemical Technology and Metallurgy, XXXVII, 2002, Book 4

DISPLACEMENT OF THE NEUTRAL AXIS BY BENDING OF A BIMODAL VISCOUS BEAM
K.Hadjov, D.Dontchev

CRITICAL CRACK CONCENTRATION FOR ISOTROPIC SOLIDS
K.Hadjov, D. Dontchev

 

University of Chemical Technology and Metallurgy, 8 Kl. Ohridski, 1756 Sofia, BulgariaE-mail: klm@uctm.edu

Received 2 May 2002 Accepted 22 May 2002

 

This work is intended to determine the critical crack concentration by static loading of homogeneous isotropic solids. The results from the linear fracture mechanics were used and the limit cracks concentration on the basis of the crack resistance were determined. Thus, the critical stress intensity factor and the plastic limit stress in the end of a crack were used as material constants, describing the brittle and ductile failure resistance. The obtained theoretical results are discussed and plotted in 2D and 3D graphics. It was found a theoretical ground to explain the limited values of the critical cracks' concentration in real solids.
Keywords: stress intensity factor, damage, fracture mechanics