Stress Distribution around Polygonal Holes in Graphite/Epoxy Laminates Under in Plane Loading

A. Rohith, A. Raveendra, D.K.Nageswara Rao, M.Ramesh Babu


An analytical solution is presented to determine the stress distribution around polygonal holes in symmetric Graphite/epoxy laminates under inplane loading.  Basic formulation given by Savin has been adopted and enhanced by introducing into it the generalized mapping function and arbitrary biaxial loading condition.  These features have provided extra dimension to consider any shape of hole and any kind of inplane loading. The validity of the solution is cheeked by reproducing the results of various authors in the literature. This solutions is extremely useful to study the effect of hole shape, type of loading, fiber orientation, laminate geometry and stacking sequence on stress distribution. These parameters are studied for symmetric laminates containing different shapes of holes and loading conditions. The results of the present solutions are satisfactory when compared with the results in the literature. Results obtained from the general solution for inplane loading are also validated by FEM results  obtained from ANSYS.

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