Exploiting thermal strain to achieve an in-situ magnetically graded material

Freeman, Felicity; Lincoln, Alex; Sharp, J. H.; Lambourne, Alexis; Todd, Iain

doi:10.1016/j.matdes.2018.11.011

Cited by 24 publications

(14 citation statements)

References 40 publications

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“…The key thing which this study demonstrates over recent studies that have explored the impact of varying process variables [27][28][29], and software which computationally optimises for a target parameter [14,15], is that the control of process parameters, and their impact on the design, resides with the design engineer. The advantages of this approach are that the design knowledge and control over manufacturing will inherently upskill the engineer, allowing both increased creativity in DfAM and bridging the knowledge gap between design and manufacturing.…”

Section: Methodsmentioning

confidence: 99%

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Temporal design for additive manufacturing

Saliba

Kirkman-Brown

Thomas-Seale

2020

Int J Adv Manuf Technol

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Additive manufacturing (AM) is expected to generate huge economic revenue by 2025; however, this will only be realised by overcoming the barriers that are preventing its increased adoption to end-use parts. Design for AM (DfAM) is recognised as a multi-faceted problem, exasperated by constraints to creativity, knowledge propagation, insufficiencies in education and a fragmented software pipeline. This study proposes a novel approach to increase the creativity in DfAM. Through comparison between DfAM and in utero human development, the unutilised potential of design through the time domain was identified. Therefore, the aim of the research is to develop a computer-aided manufacturing (CAM) programme to demonstrate design through the time domain, known as Temporal DfAM (TDfAM). This was achieved through a bespoke MATLAB code which applies a linear function to a process parameter, discretised across the additive build. TDfAM was demonstrated through the variation of extrusion speed combined with the infill angle, through the axial and in-plane directions. It is widely accepted in the literature that AM processing parameters change the properties of AM materials. Thus, the application of the TDfAM approach offers the engineer increased creative scope and control, whilst inherently upskilling knowledge, in the design of AM materials.

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Section: Methodsmentioning

confidence: 99%

“…This approach limits the technique to multi-material AM platforms. A few recent studies have proposed the optimisation of build parameters to control a design variable such as magnetic functional grading [27], grain distribution [28] and phase [29].…”

Section: Temporal Design For Additive Manufacturingmentioning

confidence: 99%

Temporal design for additive manufacturing

Saliba

Kirkman-Brown

Thomas-Seale

2020

Int J Adv Manuf Technol

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“…AM's ability to realize different topology optimizations could be the means to produce high mechanical strength-low density, special purpose core geometries to optimally guide magnetic energy in electrical machines [20,[26][27][28][29][30][31][32]. This also comes with the additional advantage of increased ductility due to enablement of multiscale microstructures.…”

Section: Corementioning

confidence: 99%

A Review on Additive Manufacturing Possibilities for Electrical Machines

et al. 2021

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This paper presents current research trends and prospects of utilizing additive manufacturing (AM) techniques to manufacture electrical machines. Modern-day machine applications require extraordinary performance parameters such as high power-density, integrated functionalities, improved thermal, mechanical & electromagnetic properties. AM offers a higher degree of design flexibility to achieve these performance parameters, which is impossible to realize through conventional manufacturing techniques. AM has a lot to offer in every aspect of machine fabrication, such that from size/weight reduction to the realization of complex geometric designs. However, some practical limitations of existing AM techniques restrict their utilization in large scale production industry. The introduction of three-dimensional asymmetry in machine design is an aspect that can be exploited most with the prevalent level of research in AM. In order to take one step further towards the enablement of large-scale production of AM-built electrical machines, this paper also discusses some machine types which can best utilize existing developments in the field of AM.

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“…Fig. 8c) presents a family of rotors designed for a synchronous reluctance machine [26]. Such rotor construction requires careful considerations, as both the electromagnetic and mechanical design aspects need to be addressed jointly.…”

Section: B Core and Pm Magnetic Materialsmentioning

confidence: 99%

“…This is due to additional magnetic flux paths introduced by the structural design features (bridges). In [26], AM enabled for the rotor construction, with non-magnetic bridges eliminating the undesirable flux leakage effects. Altering magnetic properties of the selected rotor regions was achieved here by the use of rapid solidification and thermal strain associated with SLM.…”

Section: B Core and Pm Magnetic Materialsmentioning

confidence: 99%