ON FLEXURAL ENERGY DISSIPATION CHARACTERIZATION OF FRP LAMINATES USING 2D-ANALYTICAL MODELS

The fiber reinforced composite materials are ideal for structural applications wherever high strength-to-weight and stiffness-to-weight ratios are needed. Composite materials are often tailored to fulfill the actual needs of stiffness and strength by changing lay-up and fiber orientations. The ability to tailor a material to its job is one among the most vital advantages of a composite material over a normal material. Therefore the research and development of composite materials within the design of aerospace, civil and mechanical structures has grown tremendously within the past few decades. In this paper the flexural damping behaviors of composites were characterized analytically during this study. Damping of laminates is calculated analytically by strain energy weighted dissipation method. The specific damping capacity (SDC) of the composite was determined in accordance to the energy dissipation concept, which was defined as the ratio of the dissipated energy to the stored energy for per circle of vibration. A 2-D analytical model was developed basing on Adams, Ni RG models. The 2-D analytical model was validated by the scrutiny of SDC of [0/60/60]s and [0/90/45/45]s laminates with the experimental information. A MATLAB code is developed for repetitive nature of calculations. SDC for unidirectional and cross ply laminates are predicted with Code developed.