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Surface vs Truss lattice networks, benefits and limitations
Örebro University, School of Science and Technology.ORCID iD: 0000-0002-9362-8328
Örebro University, School of Science and Technology.ORCID iD: 0000-0003-1408-2249
2018 (English)In: NAFEMS nordic: Exploring the Design Freedom of Additive Manufacturing through Simulation, NAFEMS , 2018, p. 217-218Conference paper, Published paper (Refereed)
Abstract [en]

The use of additive manufacturing is growing rapidly among industries within many different fields of fabrication. The benefits of applying additive manufacturing can be many and an application that have received special interest is the ability to design lightweight components. Lightweight components can be fabricated with additive manufacturing with the use of lattices that have a high stiffness to weight ratio and topology optimised, complex, designs. The most commonly used lattices today are based on trusses, however, there is also the possibility to generate lattices based around continuous surfaces. In this study, the properties of the popular body-centred-cubic lattice are compared the properties of the lesser known Schwartz diamond surface lattice. The mechanical compression properties, the fabrication processes, and the possibilities of the lattices are discussed and analysed.

Place, publisher, year, edition, pages
NAFEMS , 2018. p. 217-218
National Category
Engineering and Technology Composite Science and Engineering
Research subject
Mechanical Engineering
Identifiers
URN: urn:nbn:se:oru:diva-70704OAI: oai:DiVA.org:oru-70704DiVA, id: diva2:1270075
Conference
NAFEMS Nordic 2018, Göteborg, Sweden, 24-25 April, 2018
Available from: 2018-12-12 Created: 2018-12-12 Last updated: 2019-06-13Bibliographically approved
In thesis
1. More Than a Shadow: Computed Tomography Method Development and Applications Concerning Complex Material Systems
Open this publication in new window or tab >>More Than a Shadow: Computed Tomography Method Development and Applications Concerning Complex Material Systems
2019 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The complexity of the components fabricated in today's industry is ever increasing. This is partly due to market pressure, but it is also a result from recent progress in fabrication technologies that open up new design possibilities. The increased use of additive manufacturing and multi-material systems, especially, has driven the complexity of parts to new heights. The new complex material systems bring benets in many areas such as; mechanical properties, weight reduction, and multifunctions. However, the increased complexity also makes inspection and dimensional control more dicult. In additive manufacturing, for example, internal features can be fabricated which cannot be seen or measured with conventional tools. There is thus a need for non-destructive inspection methods that can measure these geometries. Such a method is X-ray computed tomography. Computed tomography utilizes the X-rays ability to penetrate material to create 3D digital volumes of components. Measurements and material investigations can be performed in these volumes without any damage to the investigated component. However, industrial computed tomography is still not a fully mature method and there are many uncertainties associated with the investigation technique. In this work, a dual-energy computed tomography tool has been developed with the aim to increase the performance of computed tomography when investigating complex geometries and material combinations. This method has been applied to various phantoms and an industrial case. Also, in this work, complex lattice structures fabricated with additive manufacturing have been investigated and analysed using computed tomography. The results show that the new DECT method improves measurement results and can be utilized to inspect multi-material components. The results also show that computed tomography can be used successfully to gain knowledge about complex lattices.

Place, publisher, year, edition, pages
Örebro: Örebro University, 2019. p. 139
Series
Örebro Studies in Technology, ISSN 1650-8580 ; 84
National Category
Other Mechanical Engineering
Identifiers
urn:nbn:se:oru:diva-73739 (URN)978-91-7529-286-1 (ISBN)
Public defence
2019-06-12, Örebro universitet, Teknikhuset, Hörsal T, Fakultetsgatan 1, Örebro, 13:15 (English)
Opponent
Supervisors
Available from: 2019-04-15 Created: 2019-04-15 Last updated: 2019-06-13Bibliographically approved

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Jansson, AntonPejryd, Lars

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