Structural Analysis of Composite Wind Turbine Blades

Nonlinear Mechanics and Finite Element Models with Material Damping

  • Dimitris I┬áChortis

Part of the Research Topics in Wind Energy book series (RTWE, volume 1)

About this book

Introduction

This book concerns the development of novel finite elements for the structural analysis of composite beams and blades. The introduction of material damping is also an important aspect of composite structures and it is presented here in terms of their static and dynamic behavior. The book thoroughly presents a new shear beam finite element, which entails new blade section mechanics, capable of predicting structural blade coupling due to composite coupling and/or internal section geometry. Theoretical background is further expanded towards the inclusion of nonlinear structural blade models and damping mechanics for composite structures. The models effectively include geometrically nonlinear terms due to large displacements and rotations, improve the modeling accuracy of very large flexible blades, and enable the modeling of rotational stiffening and buckling, as well as, nonlinear structural coupling. Validation simulations on specimen level study the geometric nonlinearities effect on the modal frequencies and damping values of composite strips of various angle-ply laminations under either tensile or buckling loading. A series of correlation cases between numerical predictions and experimental measurements give credence to the developed nonlinear beam finite element models and underline the essential role of new nonlinear damping and stiffness terms.

Keywords

Composite Wind Turbine Blades FEM Nonlinear Mechanics Wind Energy

Authors and affiliations

  • Dimitris I┬áChortis
    • 1
  1. 1.Structural Analysis and Active, Department of Mechanical EngineeringUniversity of PatrasPatrasGreece

Bibliographic information

  • DOI https://doi.org/10.1007/978-3-319-00864-6
  • Copyright Information Springer International Publishing Switzerland 2013
  • Publisher Name Springer, Heidelberg
  • eBook Packages Engineering
  • Print ISBN 978-3-319-00863-9
  • Online ISBN 978-3-319-00864-6
  • Series Print ISSN 2196-7806
  • Series Online ISSN 2196-7814
  • About this book
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