On the generation and characterisation of internal micro-architectures

DSpace/Manakin Repository

Open Research Exeter (ORE)

On the generation and characterisation of internal micro-architectures

Show simple item record

dc.contributor.author Raymont, David Richard en_US
dc.date.accessioned 2011-12-13T14:29:06Z en_US
dc.date.accessioned 2013-03-21T11:01:26Z
dc.date.issued 2011-05-10 en_US
dc.description.abstract Open cell micro-architectures are used in a large number of applications, ranging from medical, such as bone scaffolds, to industrial, such as heat transfer structures. Traditionally these structures are manufactured using foaming processes, however advances in additive manufacturing (AM) now allow such structures to be designed computationally and fabricated to a high degree of precision. In this thesis image-based methods are developed for the purpose of generating periodic micro-architectures based on implicit representations. The algorithms developed are shown to be efficient and robust, allowing for the creation of both surface and volume meshes. Methods are presented for the creation of functionally graded structures allowing for arbitrary variations in density between specifiable volume fractions. These algorithms are further extended for domain conforming applications as well as for internal structures in CAD models. By utilising a hybrid approach, imaging techniques can be exploited for the generation of internal structures in CAD models without de-featuring the original external geometry. The structures of interest are also shown to be manufacturable via selective laser melting (SLM). The issue of characterisation, for linear elastic properties, is addressed through the use of a novel homogenisation technique. Large multi-scale problems in irregular domains are divided into smaller sub-volumes using established tetrahedral volume meshing techniques. By performing a series of virtual tests on these macroelements their effective properties can be computed and subsequently used in macro-simulations. The technique is shown to yield results in excellent agreement with the often used kinematic uniform boundary conditions (KUBC). It is also shown how these properties may be used for visualising the distribution in properties over a domain. en_GB
dc.description.sponsorship Simpleware en_GB
dc.description.sponsorship EPSRC en_GB
dc.identifier.grantnumber EPSRC CASE/CAN/07/86 en_GB
dc.identifier.uri http://hdl.handle.net/10036/3317 en_US
dc.language.iso en en_GB
dc.publisher University of Exeter en_GB
dc.rights.embargodate 2014-05-01
dc.rights.embargoreason To allow the publication of papers and due to patents being filed. en_GB
dc.title On the generation and characterisation of internal micro-architectures en_GB
dc.type Thesis or dissertation en_GB
dc.contributor.advisor Hao, Liang en_US
dc.publisher.department College of Engineering, Mathematics and Physical Sciences en_GB
dc.type.degreetitle PhD in Engineering en_GB
dc.type.qualificationlevel Doctoral en_GB
dc.type.qualificationname PhD en_GB


Files in this item

Files Size Format View Description
RaymontD.pdf 23.25Mb PDF View/Open Main article
RaymontD_fm.pdf 128.0Kb PDF View/Open Front matter

This item appears in the following Collection(s)

Show simple item record

Browse

My Account

Local Links