Compressive behavior of composite laminates with multiple delaminations of different sizes

摘要

Effects of multiple delaminations of different sizes on the compressive behavior of rectangular composite laminates are studied using a finite element analysis, because it is reported that the size of delaminations which occur in composite laminates due to impact loading increases linearly from the impacted surface to the back surface. ^Embedded delaminations exist at a regular interval in the thickness direction, but their diameters change linearly with the depth from the surface. ^The loading edges are fixed and the side edges simply-supported, following the SACMA CAI test standard. ^Fracture due to instability of the delamination propagation is discussed using distributions of energy release rate along the delamination edges. ^The effect of the variation of the size of delamination on the compressive behavior is found to be significant, and the postbuckling behaviors are different from those of the plates with equal diameter delaminations. ^(Author)