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Structural Mechanics of Anti-Sandwiches

An Introduction

  • Marcus Aßmus

Part of the SpringerBriefs in Applied Sciences and Technology book series (BRIEFSAPPLSCIENCES)

Also part of the SpringerBriefs in Continuum Mechanics book sub series (BRIEFSCONTINU)

Table of contents

  1. Front Matter
    Pages i-ix
  2. Marcus Aßmus
    Pages 1-11
  3. Marcus Aßmus
    Pages 13-25
  4. Marcus Aßmus
    Pages 27-36
  5. Marcus Aßmus
    Pages 37-49
  6. Marcus Aßmus
    Pages 51-64
  7. Marcus Aßmus
    Pages 65-79
  8. Marcus Aßmus
    Pages 81-98
  9. Marcus Aßmus
    Pages 99-103
  10. Back Matter
    Pages 105-127

About this book

Introduction

This book provides an extensive introduction to the mechanics of anti-sandwiches: non-classical composites with multiple homogeneous layers but widely differing parameters concerning their geometry and materials. Therefore, they require special attention in the context of structural mechanics. 

The theoretical framework presented here is based on a five parametric, planar continuum, which is a pragmatic version of the COSSERAT shell. The direct approach used here is enlarged where constraints are introduced to couple layers and furnish a layer-wise theory. Restrictions are made in terms of linearity – geometrical and physical. After having defined appropriate variables for the kinematics and kinetics, linear elastic material behaviour is considered, where the constitutive tensors are introduced in the context of isotropy. The basics are presented in a clear and distinct manner using index-free tensor notation. This format is simple, concise, and practical.   

Closed-form solutions of such boundary value problems are usually associated with serious limitations on the boundary conditions, which constitutes a serious disadvantage. To construct approximate solutions, a variational method is employed as the basis for computational procedures where the Finite Element Method is applied. Therefore, the introduction of the vector-matrix notation is convenient. Based on the plane considerations, a finite eight-node SERENDIPITY element with enlarged degrees of freedom is realised. To avoid artificial stiffening effects, various integration types are applied, and the solutions generated are subsequently verified with closed-form solutions for monolithic limiting cases.

Within this setting, it is possible to efficiently calculate the global structural behaviour of Anti-Sandwiches, at least up to a certain degree. The power of the proposed method in combination with the numerical solution approach is demonstrated for several case and parameter studies. In this regard, the optimal geometrical and material parameters to increase stiffness are analysed and the results for the kinematic and kinetic quantities are discussed. 

Keywords

5-Parameter Surface Continua Direct Approach Composite Structures Computational Solution eXtended layerwise Theory

Authors and affiliations

  • Marcus Aßmus
    • 1
  1. 1.Institute of MechanicsOtto von Guericke UniversityMagdeburg, Saxony-AnhaltGermany

Bibliographic information

  • DOI https://doi.org/10.1007/978-3-030-04354-4
  • Copyright Information The Author(s), under exclusive license to Springer Nature Switzerland AG 2019
  • Publisher Name Springer, Cham
  • eBook Packages Engineering
  • Print ISBN 978-3-030-04353-7
  • Online ISBN 978-3-030-04354-4
  • Series Print ISSN 2191-530X
  • Series Online ISSN 2191-5318
  • Buy this book on publisher's site