Cumulative damage model for continuous fiber composite laminates with matrix cracking and interply delaminations Conference Paper uri icon


  • Experimental evidence has shown that significant stiffness loss occurs in graphite/epoxy laminates when matrix cracking and interply delaminations exist. Therefore, a cumulative damage model for predicting stiffness loss in graphite/epoxy laminates is proposed herein by applying a thermomechanical constitutive theory for elastic composites with distributed damage. The model proceeds from a continuum mechanics and thermodynamics approach wherein the distributed damage is characterized by a set of second-order tensor-valued internal state variables. The model formulation provides a set of damage dependent laminated plate equations. These are developed by modifying the classical Kirchhoff plate theory. The effect of the matrix cracking enters the formulation through alteration in the individual lamina constitution. The effect of interply delamination enters the formulation through modifications of the Kirchhoff displacements.

published proceedings

  • ASTM Special Technical Publication

author list (cited authors)

  • Allen, D. H., Groves, S. E., & Harris, C. E.

complete list of authors

  • Allen, DH||Groves, SE||Harris, CE

publication date

  • December 1988