Startseite Auxetic behavior of Ti6Al4V lattice structures manufactured by laser powder bed fusion
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Auxetic behavior of Ti6Al4V lattice structures manufactured by laser powder bed fusion

  • Beyza Gavcar

    Beyza Gavcar was born in 1994. She received her BSc in Mechanical Engineering in 2017, and Management Engineering in 2018 from Istanbul Technical University. She is pursuing her PhD in Mechanical Engineering at Yildiz Technical University. Her research interests include additive manufacturing, design, and analysis of lattice structures. Now, she is working as a research assistant at Yildiz Technical University, Department of Mechanical Engineering.

     EMAIL logo     , Aysha Shawkat Hasan

    Aysha Shawkat Hasan was born in 1977. She is a lecturer at the Northem Technical University, Iraq. She obtained her Master’s degree in mechanical engineering (production and metallurgy) from the University of Mosul in 2002. She is pursuing her PhD in Mechanical Engineering at Yildiz Technical University. Her research interests include biomaterials, implants, and additive manufacturing.

         , Furkan Miray Atıcı

    Furkan Miray Atıcı was born in 2001. He is a Bachelor’s student of Mechanical Engineering, Yildiz Technical University. His research interests include additive manufacturing, structural optimization, structural analysis, and meta-materials.

         und Mihrigül Ekşi Altan

    Mihrigül Ekşi Altan was born in 1977. She is a professor at the Department of Mechanical Engineering, Yildiz Technical University. She received her PhD in Mechanical Engineering and Manufacturing Technologies Division from Yildiz Technical University. Her research interests include additive manufacturing, biomaterials, and bioprinting.
Veröffentlicht/Copyright: 22. Mai 2025
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Abstract

The design parameters of re-entrant honeycomb (RH) unit cells are effective in determining the auxetic structures’ behavior. This study examines the auxetic response of Ti6Al4V lattice structures fabricated using laser powder bed fusion (L-PBF), focusing on cell parameters (re-entrant angle (Ө), inclined strut length (l), and strut thickness (t)). The auxetic behavior of structures was observed numerically with finite element analysis (FEA) carried out by nTop and experimentally with quasi-static compression tests. The results presented that the minimum Poisson’s ratios (PRs) were obtained as −1.48 and −1.10 for simulation and experiments, respectively. As the absolute value of the PR increases, the auxetic behavior becomes more obvious. The absolute value of the PR increased with the increases in Ө and l, while decreased with the increase in t. The findings of this study offer an important contribution to the development of auxetic structures by adjusting the design parameters.

Keywords: auxetic; compression; finite element; negative Poisson’s ratio; re-entrant honeycomb
Corresponding author: Beyza Gavcar, Department of Mechanical Engineering, Yildiz Technical University, Istanbul, Türkiye, E-mail:

Funding source: Yildiz Technical University Coordinatorship of Scientific Research Projects

Award Identifier / Grant number: FDK-2024-6298

About the authors

Beyza Gavcar

Beyza Gavcar was born in 1994. She received her BSc in Mechanical Engineering in 2017, and Management Engineering in 2018 from Istanbul Technical University. She is pursuing her PhD in Mechanical Engineering at Yildiz Technical University. Her research interests include additive manufacturing, design, and analysis of lattice structures. Now, she is working as a research assistant at Yildiz Technical University, Department of Mechanical Engineering.

Aysha Shawkat Hasan

Aysha Shawkat Hasan was born in 1977. She is a lecturer at the Northem Technical University, Iraq. She obtained her Master’s degree in mechanical engineering (production and metallurgy) from the University of Mosul in 2002. She is pursuing her PhD in Mechanical Engineering at Yildiz Technical University. Her research interests include biomaterials, implants, and additive manufacturing.

Furkan Miray Atıcı

Furkan Miray Atıcı was born in 2001. He is a Bachelor’s student of Mechanical Engineering, Yildiz Technical University. His research interests include additive manufacturing, structural optimization, structural analysis, and meta-materials.

Mihrigül Ekşi Altan

Mihrigül Ekşi Altan was born in 1977. She is a professor at the Department of Mechanical Engineering, Yildiz Technical University. She received her PhD in Mechanical Engineering and Manufacturing Technologies Division from Yildiz Technical University. Her research interests include additive manufacturing, biomaterials, and bioprinting.

Acknowledgments

The study was supported by Yildiz Technical University Coordinatorship of Scientific Research Projects with the project number of FDK-2024-6298. The authors thank Yildiz Technical University Coordinatorship of Scientific Research Projects for the financial support.

  1. Research ethics: Not applicable.

  2. Informed consent: Not applicable.

  3. Author contributions: The authors have accepted responsibility for the entire content of this manuscript and approved its submission.

  4. Use of Large Language Models, AI and Machine Learning Tools: None declared.

  5. Conflict of interest: The authors state no conflict of interest.

  6. Research funding: This study was supported by Yildiz Technical University under grant number FDK-2024-6298.

  7. Data availability: The raw data can be obtained on request from the corresponding author.

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Published Online: 2025-05-22
Published in Print: 2025-07-28

© 2025 Walter de Gruyter GmbH, Berlin/Boston

Artikel in diesem Heft

  1. Frontmatter
  2. Auxetic behavior of Ti6Al4V lattice structures manufactured by laser powder bed fusion
  3. Hardness, shear strength, and microstructure of friction stir lap welded copper/aluminum using various parameters
  4. Influence of oscillating fiber laser welding process parameters on the fatigue response and mechanical performance of butt-jointed TWIP980 steels
  5. Fatigue analysis of TIG welded joints of dissimilar aluminum alloys
  6. Corrosion of self-piercing riveting joint in a Cl− and HSO3− environment
  7. Effect of annealing for stress relief on the surface integrity of gray cast iron with lamellar graphite after cavitation erosion
  8. Effects of boride coating on wear behaviour of biomedical grade Ti–45Nb alloy
  9. Effect of space holder agent on microstructural and mechanical properties of commercially pure titanium
  10. Impact and biaxial tensile-after impact behaviors of inter-ply hybrid carbon-glass/epoxy composite plates
  11. Improvement of the mechanical and wear properties of Al6061 alloys with quartz and SiC hybrid reinforcements by powder metallurgy
  12. Surface strain-based calculation of principal directional strains in multi-material carbon fiber laminates
  13. Tribological and mechanical behaviour of Al 359 composites reinforced with B4Cp, SiCp and flyash
  14. Effect of Al-based coatings deposited by EASC on exfoliation corrosion susceptibility of EN AW 7020-T6
  15. Green synthesis of CuO nanoparticles using Curcuma longa L. extract: composite dielectric and mechanical properties
  16. Comprehensive optimization of shot peening intensity using a hybrid model with AI-based techniques via Almen tests
https://doi.org/10.1515/mt-2025-0109
Schlagwörter für diesen Artikel
auxetic; compression; finite element; negative Poisson’s ratio; re-entrant honeycomb

Artikel in diesem Heft

  1. Frontmatter
  2. Auxetic behavior of Ti6Al4V lattice structures manufactured by laser powder bed fusion
  3. Hardness, shear strength, and microstructure of friction stir lap welded copper/aluminum using various parameters
  4. Influence of oscillating fiber laser welding process parameters on the fatigue response and mechanical performance of butt-jointed TWIP980 steels
  5. Fatigue analysis of TIG welded joints of dissimilar aluminum alloys
  6. Corrosion of self-piercing riveting joint in a Cl− and HSO3− environment
  7. Effect of annealing for stress relief on the surface integrity of gray cast iron with lamellar graphite after cavitation erosion
  8. Effects of boride coating on wear behaviour of biomedical grade Ti–45Nb alloy
  9. Effect of space holder agent on microstructural and mechanical properties of commercially pure titanium
  10. Impact and biaxial tensile-after impact behaviors of inter-ply hybrid carbon-glass/epoxy composite plates
  11. Improvement of the mechanical and wear properties of Al6061 alloys with quartz and SiC hybrid reinforcements by powder metallurgy
  12. Surface strain-based calculation of principal directional strains in multi-material carbon fiber laminates
  13. Tribological and mechanical behaviour of Al 359 composites reinforced with B4Cp, SiCp and flyash
  14. Effect of Al-based coatings deposited by EASC on exfoliation corrosion susceptibility of EN AW 7020-T6
  15. Green synthesis of CuO nanoparticles using Curcuma longa L. extract: composite dielectric and mechanical properties
  16. Comprehensive optimization of shot peening intensity using a hybrid model with AI-based techniques via Almen tests
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