Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/74726
Título: | Engineering the elastic modulus of NiTi cellular structures fabricated by selective laser melting |
Autor(es): | Bartolomeu, Flávio Costa, M. M. Alves, N. Miranda, G. Silva, Filipe Samuel |
Palavras-chave: | NiTi Power bed fusion Selective laser melting Cellular structures Elastic modulus |
Data: | 2020 |
Editora: | Elsevier 1 |
Revista: | Journal of the Mechanical Behavior of Biomedical Materials |
Resumo(s): | Nickel-titanium (NiTi) cellular structures are a very promising solution to some issues related to orthopaedic implant failure. These structures can be designed and fabricated to simultaneously address a combination of mechanical and physical properties, such as elastic modulus, porosity, wear and corrosion resistance, biocompatibility and appropriate biological environment. This ability can enhance the modest interaction currently existing between metallic dense implants and surrounding bone tissue, allowing long-term successful orthopaedic implants. For that purpose, NiTi cellular structures with different levels of porosity intended to reduce the elastic modulus were designed, modelled, selective laser melting (SLM) fabricated and characterized. Significant differences were found between the CAD design and the SLM-produced NiTi structures by performing systematic image analysis. This work proposes designing guidelines to anticipate and correct the systematic differences between CAD and produced structures. Compressive tests were carried out to estimate the elastic modulus of the produced structures and finite element analyses were performed, for comparison purposes. Linear correlations were found for the dimensions, porosity, and elastic modulus when comparing the CAD design with the SLM structures. The produced NiTi structures exhibit elastic moduli that match that of bone tissue, which is a good indication of the potential of these structures in orthopaedic implants. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/74726 |
DOI: | 10.1016/j.jmbbm.2020.103891 |
ISSN: | 1751-6161 |
Versão da editora: | https://www.sciencedirect.com/science/article/pii/S1751616120304458?via%3Dihub |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CMEMS - Artigos em revistas internacionais/Papers in international journals |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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24 - Engineering.pdf | 14,82 MB | Adobe PDF | Ver/Abrir |