STRESS CONCENTRATIONS AND FAILURE CRITERIA FOR ORTHOTROPIC AND ANISOTROPIC PLATES WITH CIRCULAR OPENINGS.

Theoretical solutions and results are given for stress concentrations and failure stresses in orthotropic and anisotropic composite plates. Solutions for the stresses around the opening given for plates subjected to uniaxial, biaxial and shear loading. The types of composites for which equations are given for stress concentration factors include unidirectional laminates, unidirectional laminates with oriented fibers, bidirectional balanced laminates, and multilayered laminates. A failure criterion based on modified Hencky-Von Mises distortion energy theory is also presented.