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Analysis and modelling of damage mechanism in FDM 3D-printed lattice structure under compression loading

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Abstract

Fused filament fabrication (FFF), commercially known as fused deposition modelling (FDM), is a widespread 3D printing process that builds up components by depositing a continuous filament of material, typically a thermoplastic, along a deTermined path. The mechanical performance of such parts is promising, even if strongly influenced by the deposition process. In this work, the mechanical behaviour of a specific lattice structure printed in acrylonitrile butadiene styrene (ABS) is studied and a model of lattice behaviour up to the damage regime is developed, with emphasis on the resulting anisotropy. The investigation starts with the analysis of the anisotropy of simple prismatic samples printed with various filament orientations. Deformation and damage of the lattice structure under compressive loading is observed at the meso- and micro-scales. An anisotropic model is then developed within the ABAQUS© environment to reproduce the elasto-plastic behaviour, incorporating onset and evolution of inter- and intra-layer damage. Good agreement is observed between the modelled and experimental response.

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Abbreviations

\({\dot \varepsilon_c}\) :

Compression strain rate [mm/mm · s−1]

σ u,flex :

Maximum bending stress [MPa]

E flex :

Flexural modulus [MPa]

ε f,t :

Failure strain value for the transverse direction [mm/mm]

ε f,p :

Failure strain value for the isotropy plane [mm/mm]

ε th,p :

Threshold strain value for damage initiation [mm/mm]

D :

Damage variable

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Authors and Affiliations

  1. Department of Engineering and Architecture, University of Parma, Parma, Italy

    Alberto Corvi, Luca Collini & Corrado Sciancalepore

  2. High Speed 3D Printing Research Center, National Taiwan University of Science and Technology, Keelung Rd, Taipei, 106, Taiwan, Republic of China

    Ajeet Kumar

Authors
  1. Alberto Corvi
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  2. Luca Collini
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  3. Corrado Sciancalepore
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  4. Ajeet Kumar
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Corresponding author

Correspondence to Alberto Corvi.

Additional information

Alberto Corvi is a Ph.D. student in the University of Parma, Parma, Italy. His research interests include Numerical Modelling, Computational Mechanics and Additive Manufacturing.

Luca Collini is Associate Professor at the Department of Engineering and Architecture of the University of Parma, Italy. His research interests include Numerical Modelling, Computational Micromechanics and Fatigue and Fracture of Materials.

Corrado Sciancalepore is researcher at the Department of Engineering and Architecture of the University of Parma, Italy. He is expert of polymers and his research focuses on the development of new eco-materials.

Ajeet Kumar is Assistant Professor at the NTUST University of Taipei, Taiwan, and researcher at the High-Speed 3D Printing Research Center, Taiwan Tech. He works on advanced and innovative Additive Manufacturing processes and structures.

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Corvi, A., Collini, L., Sciancalepore, C. et al. Analysis and modelling of damage mechanism in FDM 3D-printed lattice structure under compression loading. J Mech Sci Technol 37, 1089–1095 (2023). https://doi.org/10.1007/s12206-022-2104-4

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  • DOI: https://doi.org/10.1007/s12206-022-2104-4

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