Compressive properties of electron beam melted lattice structures with density gradient
Lattice structures are used in many applications such as lightweight design, energy absorbers and medical implants. Incorporating a density gradient in the design of lattice structures provides distinctive properties compared to designs with uniform density. In this study, density graded lattice...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Conference Paper |
| Language: | English |
| Published: |
2018
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/88302 http://hdl.handle.net/10220/45785 |
| _version_ | 1826126809281855488 |
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| author | Choy, Sing Ying Wang, Pan Sun, Chen Nan Feih, Stephanie Sin, Wai Jack Leong, Kah Fai Wei, Jun |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Choy, Sing Ying Wang, Pan Sun, Chen Nan Feih, Stephanie Sin, Wai Jack Leong, Kah Fai Wei, Jun |
| author_sort | Choy, Sing Ying |
| collection | NTU |
| description | Lattice structures are used in many applications such as lightweight design, energy
absorbers and medical implants. Incorporating a density gradient in the design of lattice structures
provides distinctive properties compared to designs with uniform density. In this study, density
graded lattice structures of four different architectures were fabricated by electron beam melting
technique with Ti-6Al-4V as building material. The samples were tested for compressive
properties in comparison to their counterparts with uniform density. Under quasi-static uniaxial
loading conditions, density graded samples exhibited more predictable deformation behavior and
higher energy absorption than samples with uniform density. Observation with scanning electron
microscopy showed that the fracture surfaces of the compressed density graded samples changed
across the structure according to strut diameter. Finite element simulation was also conducted to
compare the structural stiffness and to identify locations of highest stresses of the different lattice
designs during deformation, and the results were compared with the deformation behavior
observed from experiments. The distinctive properties of density graded lattice designs
demonstrated in this study encourage further research to achieve advanced and tailored
functionality. |
| first_indexed | 2024-10-01T06:58:44Z |
| format | Conference Paper |
| id | ntu-10356/88302 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:58:44Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/883022020-09-24T20:13:37Z Compressive properties of electron beam melted lattice structures with density gradient Choy, Sing Ying Wang, Pan Sun, Chen Nan Feih, Stephanie Sin, Wai Jack Leong, Kah Fai Wei, Jun School of Mechanical and Aerospace Engineering Proceedings of the 3rd International Conference on Progress in Additive Manufacturing (Pro-AM 2018) Singapore Centre for 3D Printing Additive Manufacturing 3D Printing DRNTU::Engineering::Mechanical engineering::Prototyping Lattice structures are used in many applications such as lightweight design, energy absorbers and medical implants. Incorporating a density gradient in the design of lattice structures provides distinctive properties compared to designs with uniform density. In this study, density graded lattice structures of four different architectures were fabricated by electron beam melting technique with Ti-6Al-4V as building material. The samples were tested for compressive properties in comparison to their counterparts with uniform density. Under quasi-static uniaxial loading conditions, density graded samples exhibited more predictable deformation behavior and higher energy absorption than samples with uniform density. Observation with scanning electron microscopy showed that the fracture surfaces of the compressed density graded samples changed across the structure according to strut diameter. Finite element simulation was also conducted to compare the structural stiffness and to identify locations of highest stresses of the different lattice designs during deformation, and the results were compared with the deformation behavior observed from experiments. The distinctive properties of density graded lattice designs demonstrated in this study encourage further research to achieve advanced and tailored functionality. ASTAR (Agency for Sci., Tech. and Research, S’pore) Published version 2018-09-03T01:55:33Z 2019-12-06T17:00:14Z 2018-09-03T01:55:33Z 2019-12-06T17:00:14Z 2018 Conference Paper Choy, S. Y., Sun, C. N., Feih, S., Wang, P., Sin, W. J., Leong, K. F., & Wei, J. (2018). Compressive properties of electron beam melted lattice structures with density gradient. Proceedings of the 3rd International Conference on Progress in Additive Manufacturing (Pro-AM 2018), 226-231. doi:10.25341/D4X306 https://hdl.handle.net/10356/88302 http://hdl.handle.net/10220/45785 10.25341/D4X306 en © 2018 Nanyang Technological University. Published by Nanyang Technological University, Singapore. 6 p. application/pdf |
| spellingShingle | Additive Manufacturing 3D Printing DRNTU::Engineering::Mechanical engineering::Prototyping Choy, Sing Ying Wang, Pan Sun, Chen Nan Feih, Stephanie Sin, Wai Jack Leong, Kah Fai Wei, Jun Compressive properties of electron beam melted lattice structures with density gradient |
| title | Compressive properties of electron beam melted lattice structures with density gradient |
| title_full | Compressive properties of electron beam melted lattice structures with density gradient |
| title_fullStr | Compressive properties of electron beam melted lattice structures with density gradient |
| title_full_unstemmed | Compressive properties of electron beam melted lattice structures with density gradient |
| title_short | Compressive properties of electron beam melted lattice structures with density gradient |
| title_sort | compressive properties of electron beam melted lattice structures with density gradient |
| topic | Additive Manufacturing 3D Printing DRNTU::Engineering::Mechanical engineering::Prototyping |
| url | https://hdl.handle.net/10356/88302 http://hdl.handle.net/10220/45785 |
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