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Improving the fracture toughness of 3D printed thermoplastic polymers by fused deposition modeling

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Abstract

This work describes a new filament deposition in fused deposition modeling process through criterion based on mechanical stress. This criterion requires that the filaments’ directions to follow the principal directions of the stress in the sample. The article also presents several Crack-test specimens that have been printed with and without respect to this criterion. The fracture behavior of these specimens has been investigated. The results show that criterion leads to an improvement of 30% in the fracture toughness. Digital image correlation has been extensively used to study the local strain field in the specimens. The strain cartographies reveal a drastic change in fracture behavior. The modification of filament direction leads to “ductile-like behavior” in crack extension which is characterized by a large deformation zone associated with a slow crack growth rate during the crack propagation.

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Notes

  1. The high displacement gradient between the crack lips leads to irrelevant high strain if the crack located subsets are not removed.

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Authors and Affiliations

  1. ERMESS, EPF-Engineering school, 2 rue Fernand Sastre, Troyes, France

    Julien Gardan & Ali Makke

  2. Institut Charles Delaunay, LASMIS, UTT, UMR CNRS 6281, 12 rue Marie Curie, 10010, Troyes, France

    Julien Gardan & Ali Makke

  3. ERMESS, EPF Engineering school, 3 bis, rue Lakanal, 92330, Sceaux, France

    Naman Recho

  4. Université Clermont Auvergne, Institut Pascal CNRS-UMR 6602, PB 10448, 63000, Clermont-Ferrand, France

    Naman Recho

Authors
  1. Julien Gardan
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  2. Ali Makke
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  3. Naman Recho
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Correspondence to Julien Gardan.

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Gardan, J., Makke, A. & Recho, N. Improving the fracture toughness of 3D printed thermoplastic polymers by fused deposition modeling. Int J Fract 210, 1–15 (2018). https://doi.org/10.1007/s10704-017-0257-4

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  • DOI: https://doi.org/10.1007/s10704-017-0257-4

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