Science and Education Publishing Journal of Ocean Research 2 1 2014 08 15 Effect of Pretwist on Free Vibration Characteristics Determination of Metallic Curved Blade Replaced with Composite Material 11 16 EN M.L. Pavan Kishore Department of Mechanical engineering, National Institute of Technology, Rourkela, India R.K. Behera JOR2014213 10.12691/jor-2-1-3 2014 07 26 2014 08 10 2014 08 15 This paper addresses the effects of a pretwist on the behavior of curved blade. The blade is considered to be clamped at one end on the axis of rotation. The vibration analysis of pre-twisted blade is performed by using finite element method based solver Ansys. The effects of pretwist on the natural frequencies and mode shapes of metallic curved blade replaced with composite are investigated. The methodology used to determine the Eigen frequency characteristics are determined and the results emphasizing the influence played by the ply angle, pretwist and stacking sequence on the free vibration characteristics are presented and pertinent conclusions are outlined.