EFFECTS OF MICRO-STRUCTURE ON THE STRESS CONCENTRATION AT A SPHERICAL CAVITY.
COLUMBIA UNIV NEW YORK DEPT OF CIVIL ENGINEERING AND ENGINEERING MECHANICS
Pagination or Media Count:
In this paper the boundary-value problem for the stress concentration at a spherical cavity in a field of isotropic tension is solved within the framework of Mindlins theory of an elastic continum with a deformable micro-structure. It is found that the stress concentration factor is moderately larger than the 32 of classical elasticity for a wide range of material properties and ratios of radius of cavity to a length parameter of the material - with a critical ratio, nearly independent of the remaining material properties, for which the stress concentration factor is a maximum. Author