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Finite Element Analysis of Internally Ply Drop-off Composite Laminates

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Author(s): Priyanka Dhurvey, N D Mittal

Journal: International Journal of Engineering Research
ISSN 2319-6890

Volume: 1;
Issue: 1;
Start page: 12;
Date: 2012;
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Keywords: ply drop-off | ply ratio thickness | lay-up | stress | ANSYS

ABSTRACT
Tapered laminated structures, whichare formed by dropping off some of the plies atdiscrete positions over the laminate, have receivedmuch attention from researchers because of theirstructural tailoring capabilities, damage tolerance,and their potential for creating significant weightsavings in engineering applications. The inherentweakness of this construction is the presence ofmaterial and geometric discontinuities at ply dropregion that induce premature interlaminar failureat interfaces between dropped and continuousplies. In the present work the finite elementanalysis of internally ply drop-off compositelaminates is presented. The effect of different layups is study. The ply drop-off ratio Th/L (whereTh is stagger distance and L is ply drop of length)is taken as 1/20. The finite element formulation iscarried out in the analysis section of the ANSYSsoftware.
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