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Computational Analysis of Loading–Unloading and Non-homogeneity Effects in Metallic Hollow Sphere Structures

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Book cover Materials with Complex Behaviour

Part of the book series: Advanced Structured Materials ((STRUCTMAT,volume 3))

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Abstract

Cellular metals can be applied in crash absorbers, heat exchangers and heat isolators, lightweight structures, acoustic and vibration damping. Cellular materials with a fairly uniform microstructure may be obtained with metallic hollow spheres welded or bonded. Such materials are known as MHSS (Metallic Hollow Sphere Structures). Crash absorbers, that act in compression and can be severely deformed, suffer severe deformation and some level of ductile damage can be expected. To consider this damage effect, the Gurson model is employed in this paper. Numerical simulation via finite elements is employed to study the mechanical behaviour of MHSS, focusing on two major aspects: first, the effect of previous compression and load reversal on voids nucleation; second, the consideration of nonuniform material properties of the metallic spheres. Numerical results are compared with experimental data.

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Acknowledgments

Moises H. Krützmann helped in the computational modeling stage. The financial support of CAPES, CNPq (Projects 572851/2008-1, 307787/2009-5, 480237/2007-7, 301068/2006-2) and PROPESQ/UFRGS is also acknowledged.

Author information

Authors and Affiliations

  1. Virtual Design Group, Universidade Federal do Rio Grande do Sul, 90035-190, Porto Alegre, RS, Brazil

    Branca F. Oliveira

  2. Escola de Engenharia, Universidade Federal do Rio Grande, 96201-900, Rio Grande, RS, Brazil

    Luiz A.B. da Cunda

  3. Faculty of Mechanical Engineering, Technical University of Malaysia, UTM Skudai, 81310, Johor, Malaysia

    Andreas Öchsner

  4. Cemacom, Universidade Federal do Rio Grande do Sul, 90035-190, Porto Alegre, RS, Brazil

    Guillermo J. Creus

Authors
  1. Branca F. Oliveira
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  2. Luiz A.B. da Cunda
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  3. Andreas Öchsner
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  4. Guillermo J. Creus
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Corresponding author

Correspondence to Branca F. Oliveira .

Editor information

Editors and Affiliations

  1. Fac. Mechanical Engineering, Dept. Materials Mechanics, Technical University of Malaysia, Skudai, Johor, 91310, Malaysia

    Andreas Öchsner

  2. Fac. Engenharia, Depto. Engenharia Industrial e Gestão, Universidade do Porto, Rua Dr. Roberto Frias s/n, Porto, 4200-465, Portugal

    Lucas Filipe Martins da Silva

  3. FB Ingenieurwissenschaften, LS Technische Mechanik, Univ. Halle-Wittenberg, Halle, 06099, Germany

    Holm Altenbach

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Oliveira, B.F., da Cunda, L.A., Öchsner, A., Creus, G.J. (2010). Computational Analysis of Loading–Unloading and Non-homogeneity Effects in Metallic Hollow Sphere Structures. In: Öchsner, A., da Silva, L., Altenbach, H. (eds) Materials with Complex Behaviour. Advanced Structured Materials, vol 3. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-12667-3_6

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