Stress Distributions around Holes in Composite Laminates Subjected to Biaxial Loading

Research paper by C. Soutis, C. Filiou

Indexed on: 01 Nov '98Published on: 01 Nov '98Published in: Applied Composite Materials


An approximate solution has been derived for the in-plane stresses near a circular hole, in an orthotropic composite laminate under biaxial loading. The derived stresses were found to be in good agreement with the exact analytical solution, for a series of laminates investigated. However, the degree of accuracy of the approximate stress distribution is strongly influenced by the laminate lay-up and the biaxiality ratio. The resultant stresses could be employed in stress based fracture models to investigate the notch sensitivity and fracture mechanisms of composite plates with an open-hole subjected to biaxial loading.