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Predicting the output dimensions, porosity and elastic modulus of additive manufactured biomaterial structures targeting orthopedic implants.
Bartolomeu, F; Fonseca, J; Peixinho, N; Alves, N; Gasik, M; Silva, F S; Miranda, G.
Afiliación
  • Bartolomeu F; Center for MicroElectroMechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal. Electronic address: flaviojorgebartolomeu@gmail.com.
  • Fonseca J; Center for MicroElectroMechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal.
  • Peixinho N; Department of Mechanical Engineering, University of Minho, Campus of Azurém, Guimarães, Portugal.
  • Alves N; Centre for Rapid and Sustainable Product Development Polytechnic Institute of Leiria, Rua General Norton de Matos, Apartado 4133, 2411-901, Leiria, Portugal.
  • Gasik M; Department of Materials Science and Engineering, School of Chemical Technology, Aalto University Foundation, 00076, Aalto, Espoo, Finland.
  • Silva FS; Center for MicroElectroMechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal.
  • Miranda G; Center for MicroElectroMechanical Systems (CMEMS-UMinho), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal.
J Mech Behav Biomed Mater ; 99: 104-117, 2019 11.
Article en En | MEDLINE | ID: mdl-31349147
SLM accuracy for fabricating porous materials is a noteworthy hindrance when aiming to obtain biomaterial cellular structures owing precise geometry, porosity, open-cells dimension and mechanical properties as outcomes. This study provides a comprehensive characterization of seventeen biomaterial Ti6Al4V-based structures in which experimental and numerical investigations (compression stress-strain tests) were carried out. Mono-material Ti6Al4V cellular structures and multi-material Ti6Al4V-PEEK cellular structures were designed, produced by SLM and characterized targeting orthopedic implants. In this work, the differences between the CAD design and the as-produced Ti6Al4V-based structures were obtained from image analysis and were used to develop predictive models. The results showed that dimensional deviations inherent to SLM fabrication are systematically found for different dimensional ranges. The present study proposes several mathematical models, having high coefficients of determination, that estimate the real dimensions, porosity and elastic modulus of Ti6Al4V-based cellular structures as function of the CAD model. Moreover, numerical analysis was performed to estimate the octahedral shear strain for correlating with bone mechanostat theory limits. The developed models can help engineers to design and obtain near-net shape SLM biomaterials matching the desired geometry, open-cells dimensions, porosity and elastic modulus. The obtained results show that by using these AM structures design it is possible to fabricate components exhibiting a strain and elastic modulus that complies with that of bone, thus being suitable for orthopedic implants.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Prótesis e Implantes / Diseño de Prótesis / Titanio / Materiales Biocompatibles / Porosidad / Módulo de Elasticidad Tipo de estudio: Prognostic_studies / Risk_factors_studies Idioma: En Revista: J Mech Behav Biomed Mater Asunto de la revista: ENGENHARIA BIOMEDICA Año: 2019 Tipo del documento: Article Pais de publicación: Países Bajos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Prótesis e Implantes / Diseño de Prótesis / Titanio / Materiales Biocompatibles / Porosidad / Módulo de Elasticidad Tipo de estudio: Prognostic_studies / Risk_factors_studies Idioma: En Revista: J Mech Behav Biomed Mater Asunto de la revista: ENGENHARIA BIOMEDICA Año: 2019 Tipo del documento: Article Pais de publicación: Países Bajos