Abstract
The general purpose finite element program MSC/NASTRAN is used to study the interply layer effects on the free edge stress field of symmetric angleplied laminates subjected to uniform tensile stress. The free edge region is modeled as a separate substructure (superelement) which enables easy mesh refinement and provides the flexibility to move the superelement along the edge. The results indicated that the effect of interply layer is to reduce the stress intensity at the free edge significantly. Another important observation of the study is that the failures observed near free edges of these types of laminates could have been caused by the interlaminar shear stresses.
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