Abstract
Finite element formulation of damped laminated composite beam considering both Euler-Bernoulli and Timoshenko beam theory is proposed based on Equivalent Modulus Theory (EMT) and Direct Procedure Technique (DPT). An operator-based approach is employed to integrate viscoelastic behaviour which results to higher-order model. The viscoelastic parameters of composite material are extracted from frequency dependent storage and loss modulus plots on performing experiments in Dynamic Mechanical Analyser over fabricated samples of single layer and eight layers separately. The DPT uses material properties of eight-layer sample, while material properties of single lamina sample are utilised in EMT and stacking sequences are made mathematically. Numerical results predicted from both methods are compared, which proves the correctness of the EMT formulation. The uniqueness of this study lies in the application of the novel mathematical formulation which uses the material properties of just the single lamina, eliminating the need for fabricating the whole composite.
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