Accession Number : ADA256955


Title :   The Axisymmetric Crack Problem in a Nonhomogeneous Medium


Descriptive Note : Final rept.


Corporate Author : LEHIGH UNIV BETHLEHEM PA


Personal Author(s) : Ozturk, M ; Erdogan, F


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a256955.pdf


Report Date : Aug 1992


Pagination or Media Count : 28


Abstract : In this paper the axisymmetric crack problem for a nonhomogeneous medium is considered. It is assumed that the shear modulus is a function of z approximated by mu = mu (sub 0) e to the alpha z power. This is a simple simulation of materials and interfacial zones with intentionally or naturally graded properties. The problem is a mixed mode problem and is formulated in terms of a pair of singular integral equations. With fracture mechanics applications in mind, the main results given are the stress intensity factors as a functions of the nonhomogeneity parameter alpha for various loading conditions. Also given are some sample results showing the crack opening displacements.


Descriptors :   *CRACKING(FRACTURING) , *FRACTURE(MECHANICS) , INTERFACES , MATERIALS , CRACKS , INTENSITY , AXISYMMETRIC , FATIGUE(MECHANICS) , PLATING , SHALE , POISSON RATIO , INTEGRAL EQUATIONS , SANDSTONE , CERAMIC MATERIALS , DIFFUSION BONDING , DISPLACEMENT , LOADS(FORCES) , SHEAR MODULUS


Subject Categories : Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE