Fracture and Structural Integrity e-ISSN 1971-8993 Open access
SI: New Trends in Fatigue and Fracture Vol. 13, No. 49 (2019)

Investigating the contribution of geometry on the failure of cellular core structures obtained by additive manufacturing

Author and affiliation details
DOI
10.3221/IGF-ESIS.49.45
Pages
478-486
Published
Published inVol. 13, No. 49 (2019)Go to the issue

Abstract

The aim of this work is to evaluate the mechanical properties and failure analysis of cellular core structures with different geometries that were obtained by additive manufacturing.

Sandwich panels are widely used in the aerospace and automotive industry. In general, the core of the panels is made of a two dimensional cellular with a honeycomb geometry. With the development of additive manufacturing methods it is possible to produce samples with complex geometries which may compete with conventional designs.

Thus an investigation was conducted to evaluate the mechanical behavior of three core geometries, specifically, regular honeycombs, lotus and hexagonal honeycombs with Plateau borders. Samples were produced in PLA (polylactic acid) by fused deposition modelling (FDM). Experimental compressive loading in three different directions, and finite element simulations of the samples permit to evaluate their deformation and failure mechanisms.

Load direction angles were found to have a strong influence in the failure mode.

Among the three structures, and for the same relative density, the lotus geometry exhibited the highest stiffness and strength. However, the absorbed energy was found to be higher for honeycomb, at two loading directions.

Some of the structures studied may be alternative to conventional designs pursuing the strategy of design with low weight and high stiffness.

Keywords

Article history

  1. ReceivedUntil the next stage: 129 days
  2. AcceptedUntil the next stage: 29 days
  3. Published

How to cite

APA

Araújo, H., Leite, M., Ribeiro, A., Deus, A. M., Reis, L., & Vaz, M. F. (2019). Investigating the contribution of geometry on the failure of cellular core structures obtained by additive manufacturing. Fracture and Structural Integrity, 13(49), 478–486. https://doi.org/10.3221/IGF-ESIS.49.45

IEEE

H. Araújo, M. Leite, A. Ribeiro, A. M. Deus, L. Reis, and M. F. Vaz, “Investigating the contribution of geometry on the failure of cellular core structures obtained by additive manufacturing,” Fracture and Structural Integrity, vol. 13, no. 49, pp. 478–486, 2019, doi: 10.3221/IGF-ESIS.49.45.

MLA

Araújo, Hugo, et al. “Investigating the contribution of geometry on the failure of cellular core structures obtained by additive manufacturing.” Fracture and Structural Integrity, vol. 13, no. 49, 2019, pp. 478–486. https://doi.org/10.3221/IGF-ESIS.49.45.

Chicago

Araújo, Hugo, Marco Leite, AMR Ribeiro, Augusto M Deus, Luis Reis, and M Fatima Vaz. 2019. “Investigating the contribution of geometry on the failure of cellular core structures obtained by additive manufacturing.” Fracture and Structural Integrity 13 (49): 478–486. https://doi.org/10.3221/IGF-ESIS.49.45.

Harvard

Araújo, H., Leite, M., Ribeiro, A., Deus, A.M., Reis, L. and Vaz, M.F. (2019) ‘Investigating the contribution of geometry on the failure of cellular core structures obtained by additive manufacturing’, Fracture and Structural Integrity, 13(49), pp. 478–486. doi: 10.3221/IGF-ESIS.49.45.

Vancouver

Araújo H, Leite M, Ribeiro A, Deus AM, Reis L, Vaz MF. Investigating the contribution of geometry on the failure of cellular core structures obtained by additive manufacturing. Fracture and Structural Integrity. 2019;13(49):478-486. doi:10.3221/IGF-ESIS.49.45

BibTeX

@article{araujo2019, author = {Araújo, Hugo and Leite, Marco and Ribeiro, AMR and Deus, Augusto M and Reis, Luis and Vaz, M Fatima}, title = {Investigating the contribution of geometry on the failure of cellular core structures obtained by additive manufacturing}, journal = {Fracture and Structural Integrity}, year = {2019}, volume = {13}, number = {49}, pages = {478--486}, doi = {10.3221/IGF-ESIS.49.45}, url = {https://doi.org/10.3221/IGF-ESIS.49.45}, issn = {1971-8993} }

RIS

TY - JOUR AU - Araújo, Hugo AU - Leite, Marco AU - Ribeiro, AMR AU - Deus, Augusto M AU - Reis, Luis AU - Vaz, M Fatima TI - Investigating the contribution of geometry on the failure of cellular core structures obtained by additive manufacturing JO - Fracture and Structural Integrity T2 - Fracture and Structural Integrity PY - 2019 DA - 2019/06/21 VL - 13 IS - 49 SP - 478 EP - 486 DO - 10.3221/IGF-ESIS.49.45 UR - https://doi.org/10.3221/IGF-ESIS.49.45 SN - 1971-8993 ER -

Licence

Copyright © 2019 Hugo Araújo, Marco Leite, AMR Ribeiro, Augusto M Deus, Luis Reis, M Fatima Vaz.

Copyright 
Authors are allowed to retain both the copyright and the publishing rights of their articles without restrictions.  

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