TY - JOUR
T1 - Mechanical behavior of polymeric selective laser sintered ligament and sheet based lattices of triply periodic minimal surface architectures
AU - Abou-Ali, Aliaa M.
AU - Al-Ketan, Oraib
AU - Lee, Dong Wook
AU - Rowshan, Reza
AU - Abu Al-Rub, Rashid K.
N1 - Funding Information:
This publication is based upon work supported by the Khalifa University (KU) under Award No. RCII-2019-003 . The authors want to acknowledge the AM team at Core Technology Platforms in New York University Abu Dhabi for helping with the 3D printing of the samples, and Mr. Pradeep George and Prof. Wesley Cantwell from the KU Aerospace Research and Innovation Center for making the CT scans.
Funding Information:
This publication is based upon work supported by the Khalifa University (KU) under Award No. RCII-2019-003. The authors want to acknowledge the AM team at Core Technology Platforms in New York University Abu Dhabi for helping with the 3D printing of the samples, and Mr. Pradeep George and Prof. Wesley Cantwell from the KU Aerospace Research and Innovation Center for making the CT scans.
Publisher Copyright:
© 2020 The Author(s)
PY - 2020/11
Y1 - 2020/11
N2 - Advances in additive manufacturing triggered a paradigm shift in the design of functional components allowing for complex topology-driven cellular lattices to be incorporated for the aim of reducing weight, enhancing multi-functionality, and facilitating manufacturability. In this paper, the compressive mechanical behavior of different polymeric lattices based on triply periodic minimal surfaces (TPMS) are investigated both experimentally and computationally. The behavior of two classes of TPMS lattices are investigated; sheet- and ligament-based lattices. Samples are fabricated using the laser powder bed fusion technique, selective laser sintering, and characterized using micro-Computed Tomography (micro-CT) and Scanning Electron Microscopy (SEM). A finite-deformation hyperelastic-viscoplastic-damage constitutive model is calibrated and employed to capture the full compressive behavior of lattices. The computational results are compared to and validated against corresponding experimental results. Results show that sheet-based polymeric TPMS lattices exhibit a stretching-dominated mode of deformation and prove to have superior stiffness and strength as compared to TPMS ligament-based lattices. The numerical simulations are in good agreement with experimental results for ligament-based lattices while significant deviation from experimental results is observed for the sheet-based lattices which is attributed to uncertainty in measuring the actual relative density and relatively higher manufacturing defects.
AB - Advances in additive manufacturing triggered a paradigm shift in the design of functional components allowing for complex topology-driven cellular lattices to be incorporated for the aim of reducing weight, enhancing multi-functionality, and facilitating manufacturability. In this paper, the compressive mechanical behavior of different polymeric lattices based on triply periodic minimal surfaces (TPMS) are investigated both experimentally and computationally. The behavior of two classes of TPMS lattices are investigated; sheet- and ligament-based lattices. Samples are fabricated using the laser powder bed fusion technique, selective laser sintering, and characterized using micro-Computed Tomography (micro-CT) and Scanning Electron Microscopy (SEM). A finite-deformation hyperelastic-viscoplastic-damage constitutive model is calibrated and employed to capture the full compressive behavior of lattices. The computational results are compared to and validated against corresponding experimental results. Results show that sheet-based polymeric TPMS lattices exhibit a stretching-dominated mode of deformation and prove to have superior stiffness and strength as compared to TPMS ligament-based lattices. The numerical simulations are in good agreement with experimental results for ligament-based lattices while significant deviation from experimental results is observed for the sheet-based lattices which is attributed to uncertainty in measuring the actual relative density and relatively higher manufacturing defects.
KW - Cellular materials
KW - Finite element modeling
KW - Polymer additive manufacturing
KW - Selective laser sintering
KW - Triply periodic minimal surface
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U2 - 10.1016/j.matdes.2020.109100
DO - 10.1016/j.matdes.2020.109100
M3 - Article
AN - SCOPUS:85090278132
VL - 196
JO - International Journal of Materials in Engineering Applications
JF - International Journal of Materials in Engineering Applications
SN - 0264-1275
M1 - 109100
ER -