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Thermal stress flow analysis in fabrication of acetabular shells using SLM

Khorasani, Amir Mahyar, Gibson, Ian, Goldberg, Moshe, Movahedi, Mohammad Masoud and Littlefair, Guy 2017, Thermal stress flow analysis in fabrication of acetabular shells using SLM, in DesTech 2016: Proceedings of the International Conference on Design and Technology, Knowledge E, Dubai, U.A.E., pp. 297-307, doi: 10.18502/keg.v2i2.629.

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Title Thermal stress flow analysis in fabrication of acetabular shells using SLM
Author(s) Khorasani, Amir Mahyar
Gibson, IanORCID iD for Gibson, Ian orcid.org/0000-0002-4149-9122
Goldberg, Moshe
Movahedi, Mohammad Masoud
Littlefair, Guy
Conference name Design and Technology. International Conference (2016 : Geelong, Victoria)
Conference location Geelong, Victoria
Conference dates 2016/12/05 - 2016/12/08
Title of proceedings DesTech 2016: Proceedings of the International Conference on Design and Technology
Editor(s) Collins, Paul K.ORCID iD for Collins, Paul K. orcid.org/0000-0003-3308-8689
Gibson, IanORCID iD for Gibson, Ian orcid.org/0000-0002-4149-9122
Publication date 2017
Conference series Design and Technology. International Conference
Start page 297
End page 307
Total pages 11
Publisher Knowledge E
Place of publication Dubai, U.A.E.
Keyword(s) acetabular shell
hip replacement prosthesis
selective laser melting,
thermal stress
Summary Additive Manufacturing (AM), more popularly known as 3D Printing, is a process for producing functional artifacts by adding layers of materials from data generated directly from 3D solid CAD models. Additive Manufacturing (AM) is the formalized term for what used to be called Rapid Prototyping and what is commonly referred to as 3D Printing. The key to how AM works is that parts are made by adding layers of material; each layer corresponding to a thin cross-section of the part derived from the original CAD data. Although most AM machines produce parts using polymers, there are an increasing number of machines that can directly fabricate in metals. The majority of these machines fabricate from raw material in powder form using a directed energy beam to create a local melt zone. Total hip replacement is recommended for people who have medical issues related to excessive wear of the acetabular, osteoarthritis, accident or age. Researches have shown that large numbers of hip arthroplasties (where the articular surface of a musculoskeletal joint is replaced), hip remodelling, or realignment are carried out annually and will increase in the next few decades. Manufacturing of acetabular shells by using AM is a promising and emerging method that has a great potential to improve public health. Lost wax casting or investment casting is currently used to produce acetabular shells followed by lengthy and complex secondary processes such as machining and polishing. Living organs and medical models have intricate 3D shapes that are challenging to identity in X-ray CT images. These images are used for preparing treatment plans to improve the quality of the surgeries regarding waiting and surgery time per procedure and care regime. For instance, a limited number of hip replacement procedures can be carried out on each acetabulum due to a decrease of bone thickness. Rapid prototyping is a suitable treatment planning tool in complex cases to enhance the quality of surgical procedure and provide long-term stability that can be used to customize the shape and size of the acetabular shell. In this paper, to analyse the manufacturing of a prosthetic acetabular shell, built-up lines resulting from a thermal stress flow and process stopping during the selective laser melting (SLM) AM process, with regarding Gibbs free energy, interfacial energy, and equilibrium temperature will be discussed. Geometrical measurements showed 1.59% and 0.27% differences between the designed and manufactured prototype for inside and outside diameter respectively.
ISSN 2518-6841
Language eng
DOI 10.18502/keg.v2i2.629
HERDC Research category E1 Full written paper - refereed
ERA Research output type E Conference publication
Copyright notice ©2017, The Authors
Free to Read? Yes
Use Rights Creative Commons Attribution licence
Persistent URL http://hdl.handle.net/10536/DRO/DU:30104746

Document type: Conference Paper
Collections: School of Engineering
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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.