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Quasi -- Static Compression and Compression -- Compression Fatigue Behavior of Regular and Irregular Cellular Biomaterials
  • +4
  • Sunil Raghavendra,
  • Alberto Molinari,
  • Anni Cao,
  • Chao Gao,
  • Filippo Berto,
  • Gianluca Zappini,
  • Matteo Benedetti
Sunil Raghavendra
University of Trento Department of Industrial Engineering
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Alberto Molinari
University of Trento Department of Industrial Engineering
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Anni Cao
Norwegian University of Science and Technology
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Chao Gao
Norwegian University of Science and Technology
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Filippo Berto
Norwegian University of Science and Technology
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Gianluca Zappini
Lincotek Medical
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Matteo Benedetti
University of Trento Department of Industrial Engineering
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Abstract

The main aim of the current study is to evaluate the compressive quasi-static and fatigue properties of titanium alloy (Ti6Al4V) cellular materials, with different topologies, manufactured via Laser Powder Bed Fusion (LPBF) process. The topologies herein considered are lattice based regular and irregular configurations of cubic, star and cross shaped unit cell along with trabecular based topology. The results have indicated that the effective stiffness of all configurations are in the range of 0.3 – 20 GPa, which is desirable for implant applications. The morphological irregularities in the structures induce bending dominated behavior affecting more the topologies with vertical struts. The S – N curves normalized with respect to the yield stress indicate that the behavior of star regular structures is between purely stretching dominated cubic and purely bending dominated cross based structures. Trabecular structures have shown desirable quasi-static and fatigue properties despite the random distribution of struts.

Peer review status:ACCEPTED

22 Nov 2020Submitted to Fatigue & Fracture of Engineering Materials & Structures
25 Nov 2020Submission Checks Completed
25 Nov 2020Assigned to Editor
27 Nov 2020Reviewer(s) Assigned
20 Dec 2020Review(s) Completed, Editorial Evaluation Pending
22 Dec 2020Editorial Decision: Revise Major
27 Dec 20201st Revision Received
28 Dec 2020Submission Checks Completed
28 Dec 2020Assigned to Editor
29 Dec 2020Reviewer(s) Assigned
16 Jan 2021Review(s) Completed, Editorial Evaluation Pending
18 Jan 2021Editorial Decision: Accept