scholarly journals Additive Alternatives

2021 ◽  
Author(s):  
◽  
Vincent McQueen
Keyword(s):  
New Zealand ◽  
Additive Manufacturing ◽  
Carbon Fibre ◽  
Design Research ◽  
Mission Statement ◽  
Low Cost ◽  
Reference Points ◽  
Human Form ◽  
Prosthetic Foot ◽  
Research Through Design

<p>As an island nation, beach and coastline activities play a significant role in daily life in New Zealand. In promoting independent and productive lives for amputees, the New Zealand Artificial Limb Service (NZALS) encourages accessing these environments. However, carbon fibre foot prosthetics can be easily compromised by these conditions, as a result of abrasion and corrosion caused by sand and saltwater. To deliver on their mission statement 2017-2021 the NZALS seeks solutions to this issue (NZALS, 2016).  In response this research project explores the possibility of offering a range of customised lifestyle-specific prosthetics that can be interchanged easily with a carbon-fibre prosthetic, to accommodate different recreational activities and thereby offer greater choice and independence for their patients.   The project focuses on a case study for low-cost durable coastline prosthetic produced through Additive Manufacturing (AM) with Nylon PA-12 using design for additive manufacturing (DFAM) principles to facilitate a product that has a human form and dynamic three-dimensionality. This will be supported by the development of a quick-release coupling system allowing amputees to easily switch between prosthetic foot types for different uses. This incorporates height adjustment, ease of customising foot and fairing combinations and improved usability.   This project has been undertaken in collaboration with the NZALS and uses a two-part design research methodology. Research ‘for’ design has been conducted by summarising, collating, and/or synthesising existing research. This was done through literature reviews, product autopsies and context scenarios. This was followed by a research ‘through’ design approach. The methods used are body storming which enabled research on how the foot functions in the scenario, analogue and digital sketching, CAD modelling, and rapid prototyping through AM.  The project provides future reference points for the NZALS to improve and expand their product offerings and to facilitate their goal of remote service provision.</p>

scholarly journals Additive Alternatives

2021 ◽  
Author(s):  
◽  
Vincent McQueen
Keyword(s):  
New Zealand ◽  
Additive Manufacturing ◽  
Carbon Fibre ◽  
Design Research ◽  
Mission Statement ◽  
Low Cost ◽  
Reference Points ◽  
Human Form ◽  
Prosthetic Foot ◽  
Research Through Design

<p>As an island nation, beach and coastline activities play a significant role in daily life in New Zealand. In promoting independent and productive lives for amputees, the New Zealand Artificial Limb Service (NZALS) encourages accessing these environments. However, carbon fibre foot prosthetics can be easily compromised by these conditions, as a result of abrasion and corrosion caused by sand and saltwater. To deliver on their mission statement 2017-2021 the NZALS seeks solutions to this issue (NZALS, 2016).  In response this research project explores the possibility of offering a range of customised lifestyle-specific prosthetics that can be interchanged easily with a carbon-fibre prosthetic, to accommodate different recreational activities and thereby offer greater choice and independence for their patients.   The project focuses on a case study for low-cost durable coastline prosthetic produced through Additive Manufacturing (AM) with Nylon PA-12 using design for additive manufacturing (DFAM) principles to facilitate a product that has a human form and dynamic three-dimensionality. This will be supported by the development of a quick-release coupling system allowing amputees to easily switch between prosthetic foot types for different uses. This incorporates height adjustment, ease of customising foot and fairing combinations and improved usability.   This project has been undertaken in collaboration with the NZALS and uses a two-part design research methodology. Research ‘for’ design has been conducted by summarising, collating, and/or synthesising existing research. This was done through literature reviews, product autopsies and context scenarios. This was followed by a research ‘through’ design approach. The methods used are body storming which enabled research on how the foot functions in the scenario, analogue and digital sketching, CAD modelling, and rapid prototyping through AM.  The project provides future reference points for the NZALS to improve and expand their product offerings and to facilitate their goal of remote service provision.</p>

scholarly journals Surgical Planning of Sacral Nerve Stimulation Procedure in Presence of Sacral Anomalies by Using Personalized Polymeric Prototypes Obtained with Additive Manufacturing Techniques

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 581 ◽  
Author(s):  
Inés Rubio-Pérez ◽  
Andrés Díaz Lantada
Keyword(s):  
Additive Manufacturing ◽  
Nerve Stimulation ◽  
Sacral Nerve Stimulation ◽  
Fused Deposition Modeling ◽  
Low Cost ◽  
Reference Points ◽  
Production Costs ◽  
Sacral Nerve ◽  
Common Reference ◽  
Fused Deposition

Sacral nerve stimulation or sacral neuromodulation involves the implantation of a stimulating electrode lead through the sacral foramina. In patients with anatomical sacral anomalies, it can constitute a challenging procedure due to a lack of common reference points present in the normal anatomy. In this study, we present an innovative application of additive manufacturing for the planning of sacral nerve stimulation techniques and related surgical procedures in complex cases, and we verify that the use of personalized patient models may help to manage the presence of sacral anomalies. The use of two alternative additive manufacturing technologies working with thermoplastic and thermoset polymers, including fused deposition modeling as low-cost alternative and laser stereolithography as industrial gold standard, is compared in terms of viability, precision and overall production costs. They pay special attention to fidelity in terms of the bone microstructure reconstruction, which is necessary for adequately planning electrode insertion. Advantages and limitations of the alternative approaches are discussed and ideas for future developments and for solving current challenges are presented.

scholarly journals Togetherness

2021 ◽  
Author(s):  
Anya Seth
Keyword(s):  
New Zealand ◽  
Case Studies ◽  
Social Isolation ◽  
Psychological Functioning ◽  
Design Research ◽  
Age Group ◽  
Theoretical Understanding ◽  
Research Through Design ◽  
Material Compatibility ◽  
The Senses

<p><b>Within New Zealand there is a disheartening and growing representation of youth experiencing feelings of social isolation and loneliness - an issue commonly only recognized after the culmination of its consequences occur. Those of 18-24-year olds are the cause for greatest current and future concern, yet, are the least researched age group. Architecture has the ability to influence physiological and psychological functioning, and thus may be used to positively affect wellbeing and experiences of loneliness. This thesis questions how architecture can more appropriately address experiences of social isolation and loneliness within student halls of residence in New Zealand through designing for wellbeing and atmosphere. </b></p> <p>To progress the research, this thesis implements both research for design and research through design. Research for design is utilized to provide a context for social isolation and loneliness in relation to wellbeing, as well as a theoretical context for atmosphere within architecture. Wellbeing and atmosphere are subsequently utilized as a framework to assess the case studies through how they support the senses, connection, surrounding objects, levels of intimacy, and material compatibility. Research through design is then utilized at two differing scales that increase in complexity, whereby each design is informed by the prior to test the practical and theoretical understanding of wellbeing and atmosphere. The first scale, a residential hall of residence, explores how wellbeing and atmosphere may be generated for a small group of people. The second scale and outcome, a public scale university hall of residence, expresses how wellbeing and atmosphere may be generated for a large group of people. Ultimately, this thesis concludes that through appropriately addressing the senses, connection, material compatibility, levels of intimacy, and surrounding objects the experience of social isolation and loneliness in student halls of residence may be improved.</p>

scholarly journals Togetherness

2021 ◽  
Author(s):  
Anya Seth
Keyword(s):  
New Zealand ◽  
Case Studies ◽  
Social Isolation ◽  
Psychological Functioning ◽  
Design Research ◽  
Age Group ◽  
Theoretical Understanding ◽  
Research Through Design ◽  
Material Compatibility ◽  
The Senses

<p><b>Within New Zealand there is a disheartening and growing representation of youth experiencing feelings of social isolation and loneliness - an issue commonly only recognized after the culmination of its consequences occur. Those of 18-24-year olds are the cause for greatest current and future concern, yet, are the least researched age group. Architecture has the ability to influence physiological and psychological functioning, and thus may be used to positively affect wellbeing and experiences of loneliness. This thesis questions how architecture can more appropriately address experiences of social isolation and loneliness within student halls of residence in New Zealand through designing for wellbeing and atmosphere. </b></p> <p>To progress the research, this thesis implements both research for design and research through design. Research for design is utilized to provide a context for social isolation and loneliness in relation to wellbeing, as well as a theoretical context for atmosphere within architecture. Wellbeing and atmosphere are subsequently utilized as a framework to assess the case studies through how they support the senses, connection, surrounding objects, levels of intimacy, and material compatibility. Research through design is then utilized at two differing scales that increase in complexity, whereby each design is informed by the prior to test the practical and theoretical understanding of wellbeing and atmosphere. The first scale, a residential hall of residence, explores how wellbeing and atmosphere may be generated for a small group of people. The second scale and outcome, a public scale university hall of residence, expresses how wellbeing and atmosphere may be generated for a large group of people. Ultimately, this thesis concludes that through appropriately addressing the senses, connection, material compatibility, levels of intimacy, and surrounding objects the experience of social isolation and loneliness in student halls of residence may be improved.</p>

scholarly journals Additive Manufacturing-Based In Situ Consolidation of Continuous Carbon Fibre-Reinforced Polycarbonate

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2450
Author(s):  
Andreas Borowski ◽  
Christian Vogel ◽  
Thomas Behnisch ◽  
Vinzenz Geske ◽  
Maik Gude ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Carbon Fibre ◽  
Bending Test ◽  
Thermoplastic Composites ◽  
Experimental Investigations ◽  
Material Structure ◽  
Three Point Bending ◽  
Continuous Fibre ◽  
Local Material

Continuous carbon fibre-reinforced thermoplastic composites have convincing anisotropic properties, which can be used to strengthen structural components in a local, variable and efficient way. In this study, an additive manufacturing (AM) process is introduced to fabricate in situ consolidated continuous fibre-reinforced polycarbonate. Specimens with three different nozzle temperatures were in situ consolidated and tested in a three-point bending test. Computed tomography (CT) is used for a detailed analysis of the local material structure and resulting material porosity, thus the results can be put into context with process parameters. In addition, a highly curved test structure was fabricated that demonstrates the limits of the process and dependent fibre strand folding behaviours. These experimental investigations present the potential and the challenges of additive manufacturing-based in situ consolidated continuous fibre-reinforced polycarbonate.

Influence of Specimen Layout on 17-4PH (AISI 630) Alloys Fabricated by Low-Cost Additive Manufacturing

2021 ◽  
Author(s):  
Chanun Suwanpreecha ◽  
Phanuphak Seensattayawong ◽  
Vorawat Vadhanakovint ◽  
Anchalee Manonukul
Keyword(s):  
Additive Manufacturing ◽  
Low Cost

Printing of Low Cost Sensors by Additive Manufacturing

2021 ◽  
Author(s):  
Salman Ahmad ◽  
Muhammad Shakeel ◽  
Nadeem Iqbal ◽  
Mohsin Amin ◽  
Khalid Rahman
Keyword(s):  
Additive Manufacturing ◽  
Low Cost

scholarly journals Gold, Silver, and Electrum Electroless Plating on Additively Manufactured Laser Powder-Bed Fusion AlSi10Mg Parts: A Review

Coatings ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 422
Author(s):  
Dana Ashkenazi ◽  
Alexandra Inberg ◽  
Yosi Shacham-Diamand ◽  
Adin Stern
Keyword(s):  
Additive Manufacturing ◽  
Low Cost ◽  
Ion Beam ◽  
Surface Finishing ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Finishing Process ◽  
Gold Silver ◽  
3D Printed

Additive manufacturing (AM) revolutionary technologies open new opportunities and challenges. They allow low-cost manufacturing of parts with complex geometries and short time-to-market of products that can be exclusively customized. Additive manufactured parts often need post-printing surface modification. This study aims to review novel environmental-friendly surface finishing process of 3D-printed AlSi10Mg parts by electroless deposition of gold, silver, and gold–silver alloy (e.g., electrum) and to propose a full process methodology suitable for effective metallization. This deposition technique is simple and low cost method, allowing the metallization of both conductive and insulating materials. The AlSi10Mg parts were produced by the additive manufacturing laser powder bed fusion (AM-LPBF) process. Gold, silver, and their alloys were chosen as coatings due to their esthetic appearance, good corrosion resistance, and excellent electrical and thermal conductivity. The metals were deposited on 3D-printed disk-shaped specimens at 80 and 90 °C using a dedicated surface activation method where special functionalization of the printed AlSi10Mg was performed to assure a uniform catalytic surface yielding a good adhesion of the deposited metal to the substrate. Various methods were used to examine the coating quality, including light microscopy, optical profilometry, XRD, X-ray fluorescence, SEM–energy-dispersive spectroscopy (EDS), focused ion beam (FIB)-SEM, and XPS analyses. The results indicate that the developed coatings yield satisfactory quality, and the suggested surface finishing process can be used for many AM products and applications.

scholarly journals Development of an Additive Manufacturing System for the Deposition of Thermoplastics Impregnated with Carbon Fibers

2019 ◽  
Vol 3 (2) ◽  
pp. 35 ◽  
Author(s):  
Miguel Reis Silva ◽  
António M. Pereira ◽  
Nuno Alves ◽  
Gonçalo Mateus ◽  
Artur Mateus ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Additive Manufacturing ◽  
Carbon Fibers ◽  
Low Cost ◽  
Deposition Process ◽  
Processing Parameters ◽  
Yarn Diameter ◽  
Thermoplastic Matrix ◽  
Anisotropic Mechanical Properties ◽  
Long Carbon Fiber

This work presents an innovative system that allows the oriented deposition of continuous fibers or long fibers, pre-impregnated or not, in a thermoplastic matrix. This system is used in an integrated way with the filamentary fusion additive manufacturing technology and allows a localized and oriented reinforcement of polymer components for advanced engineering applications at a low cost. To demonstrate the capabilities of the developed system, composite components of thermoplastic matrix (polyamide) reinforced with pre-impregnated long carbon fiber (carbon + polyamide), 1 K and 3 K, were processed and their tensile and flexural strength evaluated. It was demonstrated that the tensile strength value depends on the density of carbon fibers present in the composite, and that with the passage of 2 to 4 layers of fibers, an increase in breaking strength was obtained of about 366% and 325% for the 3 K and 1 K yarns, respectively. The increase of the fiber yarn diameter leads to higher values of tensile strength of the composite. The obtained standard deviation reveals that the deposition process gives rise to components with anisotropic mechanical properties and the need to optimize the processing parameters, especially those that lead to an increase in adhesion between deposited layers.

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