A numerical approach for designing functionally stiff triply-periodic-minimal-surface structures
Biomedical implants require stiffnesses matching those of the surrounding bone to avoid stress shielding. Triply-periodic-minimal-surface (TPMS) structures have shown promising characteristics in preventing stress shielding; however, they are limited in allowing for anisotropic stiffness properties...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2022-01-01
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| Series: | MATEC Web of Conferences |
| Online Access: | https://www.matec-conferences.org/articles/matecconf/pdf/2022/17/matecconf_rapdasa2022_01002.pdf |
| _version_ | 1811205840145743872 |
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| author | Blackwell Matthew Austin van Rooyen Melody Becker Thorsten Hermann |
| author_facet | Blackwell Matthew Austin van Rooyen Melody Becker Thorsten Hermann |
| author_sort | Blackwell Matthew Austin |
| collection | DOAJ |
| description | Biomedical implants require stiffnesses matching those of the surrounding bone to avoid stress shielding. Triply-periodic-minimal-surface (TPMS) structures have shown promising characteristics in preventing stress shielding; however, they are limited in allowing for anisotropic stiffness properties that are typically inherent in bone. This paper presents an approach to simplifying a TPMS structure so that common geometries can be used to approximate it. The wall thickness is varied until the desired functional and directional stiffnesses are determined through finite element modelling. Validation of the finite element models is provided through the compression testing of laser powder bed fusion (LPBF) produced specimens. The displacement response to compression testing is presented along with the final structure, which closely matches the stiffness of bone. This approach has the potential to increase implant longevity and improve the lives of implant recipients. |
| first_indexed | 2024-04-12T03:37:54Z |
| format | Article |
| id | doaj.art-ad677233cbf84791a4fde28c515065d3 |
| institution | Directory Open Access Journal |
| issn | 2261-236X |
| language | English |
| last_indexed | 2024-04-12T03:37:54Z |
| publishDate | 2022-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | MATEC Web of Conferences |
| spelling | doaj.art-ad677233cbf84791a4fde28c515065d32022-12-22T03:49:22ZengEDP SciencesMATEC Web of Conferences2261-236X2022-01-013700100210.1051/matecconf/202237001002matecconf_rapdasa2022_01002A numerical approach for designing functionally stiff triply-periodic-minimal-surface structuresBlackwell Matthew Austin0van Rooyen Melody1Becker Thorsten Hermann2Department of Mechanical and Mechatronic Engineering, University of StellenboschDepartment of Mechanical and Mechatronic Engineering, University of StellenboschCentre for Materials Engineering, University of Cape TownBiomedical implants require stiffnesses matching those of the surrounding bone to avoid stress shielding. Triply-periodic-minimal-surface (TPMS) structures have shown promising characteristics in preventing stress shielding; however, they are limited in allowing for anisotropic stiffness properties that are typically inherent in bone. This paper presents an approach to simplifying a TPMS structure so that common geometries can be used to approximate it. The wall thickness is varied until the desired functional and directional stiffnesses are determined through finite element modelling. Validation of the finite element models is provided through the compression testing of laser powder bed fusion (LPBF) produced specimens. The displacement response to compression testing is presented along with the final structure, which closely matches the stiffness of bone. This approach has the potential to increase implant longevity and improve the lives of implant recipients.https://www.matec-conferences.org/articles/matecconf/pdf/2022/17/matecconf_rapdasa2022_01002.pdf |
| spellingShingle | Blackwell Matthew Austin van Rooyen Melody Becker Thorsten Hermann A numerical approach for designing functionally stiff triply-periodic-minimal-surface structures MATEC Web of Conferences |
| title | A numerical approach for designing functionally stiff triply-periodic-minimal-surface structures |
| title_full | A numerical approach for designing functionally stiff triply-periodic-minimal-surface structures |
| title_fullStr | A numerical approach for designing functionally stiff triply-periodic-minimal-surface structures |
| title_full_unstemmed | A numerical approach for designing functionally stiff triply-periodic-minimal-surface structures |
| title_short | A numerical approach for designing functionally stiff triply-periodic-minimal-surface structures |
| title_sort | numerical approach for designing functionally stiff triply periodic minimal surface structures |
| url | https://www.matec-conferences.org/articles/matecconf/pdf/2022/17/matecconf_rapdasa2022_01002.pdf |
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