Coupled systems mechanics

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Localized failure in damage dynamics

  • Do, Xuan Nam (Universite de Technologie Compiegne / Sorbonne Universites, Laboratoire Roberval de Mecanique) ;
  • Ibrahimbegovic, Adnan (Universite de Technologie Compiegne / Sorbonne Universites, Laboratoire Roberval de Mecanique) ;
  • Brancherie, Delphine (Universite de Technologie Compiegne / Sorbonne Universites, Laboratoire Roberval de Mecanique)
  • Received : 2015.05.17
  • Accepted : 2015.09.05
  • Published : 2015.09.25
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Abstract

In this work we present a one-dimensional damage model capable of representing the dynamic fracture for elastodamage bar with combined hardening in fracture process zone - FPZ and softening with embedded strong discontinuities. This model is compared with another one we recently introduced (Do et al. 2015) and it shows a good agreement between two models. Namely, it is indicated that strain-softening leads to a sensitivity of results on the mesh discretization. Strain tends to localization in a single element which is the smallest possible area in the finite element simulations. The strain-softening element in the middle of the bar undergoes intense deformation. Strain increases with increasing mesh refinement. Strain in elements outside the strain-softening element gradually decreases to zero.

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References

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