Voxel-Based CAD Framework for Planning Functionally Graded and Multi-Step Rapid Fabrication Processes

2019 ◽  
Author(s):  
Cole Brauer ◽  
Daniel M. Aukes
Keyword(s):  
3D Printing ◽  
Rapid Prototyping ◽  
Functionally Graded ◽  
Manufacturing Processes ◽  
Printing Process ◽  
Low Level ◽  
Rapid Fabrication ◽  
Graded Material ◽  
3D Printed ◽  
New Framework

Abstract In this paper we describe a new framework for planning functionally graded and multi-step fabrication processes for use in rapid prototyping applications. This framework is contributing to software tools that will simplify planning multi-material manufacturing processes and thereby make this type of manufacturing more accessible. We introduce the material description itself, low-level operations which can be used to combine one or more geometries together, and algorithms which assist the designer in computing manufacturing-compatible sequences. We then apply these tools to several example scenarios. First, we demonstrate the use of a Gaussian blur to add graded material transitions to a model which can then be produced using a multimaterial 3D printing process. Our second example highlights our solution to the problem of inserting a discrete, off-the-shelf part into a 3D printed model during the printing sequence. Finally, we implement this second example and manufacture two example components. The results show that the framework can be used to effectively generate the files needed to produce specific classes of parts.

Biomimetic design considerations for 3D-printed joints

2021 ◽  
Author(s):  
Alessandro Luna
Keyword(s):  
3D Printing ◽  
3D Models ◽  
Functionally Graded ◽  
Unit Cell ◽  
Implant Design ◽  
Biomimetic Design ◽  
3D Print ◽  
Design Considerations ◽  
Graded Material ◽  
3D Printed

3D-printing innovations are being explored as a uniting framework for the future of individualized joint replacement. The ability to convert 2D medical images to adjustable 3D models means a patient’s own anatomy can serve as the foundation for implant design. There are three biomimetic design considerations to understand the research on these new implants. First, optimizing the unit cell of 3D models can give researchers the essential building block necessary to 3D-print reliable artificial joints. Second, adequate porosity when designing a 3D-printed biomimetic joint is a balance between strength and the need for osseointegration. Third, functionally graded material as a design principle connects unit cell and porosity to create a 3D-printed product with complex properties along different spacial axes. 3D printing offers the opportunity to incorporate biomimetic design principles that were previously unobtainable with traditional manufacturing methods.

scholarly journals Novel 3D-Printed MEMS Magnetometer with Optical Detection

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 783 ◽  
Author(s):  
Matthias Kahr ◽  
Wilfried Hortschitz ◽  
Harald Steiner ◽  
Michael Stifter ◽  
Andreas Kainz ◽  
...  
Keyword(s):  
3D Printing ◽  
Product Development ◽  
Rapid Prototyping ◽  
Low Cost ◽  
High Accuracy ◽  
Structural Performance ◽  
Sensitivity Measurement ◽  
Optical Readout ◽  
3D Printed ◽  
Working Principle

This paper reports a novel 3D printed MEMS magnetometer with optical readout, which demonstrates the advantages of 3D printing technology in terms of rapid prototyping. Low-cost and fast product development cycles favour 3D printing as an effective tool. Sensitivity measurement with such devices indicate high accuracy and good structural performance, considering material and technological uncertainties. This paper is focusing on the novelty of the rapid, 3D-printing prototyping approach and verification of the working principle for printed MEMS magnetometers.

scholarly journals A Systematic Review of the Clinical Value and Applications of Three-Dimensional Printing in Renal Surgery

2019 ◽  
Vol 8 (7) ◽  
pp. 990 ◽  
Author(s):  
Catalina Lupulescu ◽  
Zhonghua Sun
Keyword(s):  
Systematic Review ◽  
3D Printing ◽  
Renal Disease ◽  
User Satisfaction ◽  
Surgical Simulation ◽  
Case Reports ◽  
Time Duration ◽  
Printing Process ◽  
Estimated Blood Loss ◽  
3D Printed

The purpose of this systematic review is to collate and analyse the current literature which examines clinical applications of 3D printing for renal disease, alongside cost and time duration factors associated with the printing process. A comprehensive search of the literature was performed across five different databases to identify studies that qualitatively and quantitatively assessed the value of 3D-printed kidney models for renal disease. Twenty-seven studies met the selection criteria for inclusion in the review. Twenty-five were original studies, and two were case reports. Of the 22 studies reporting a qualitative evaluation, the analysis of findings demonstrated the value of the 3D-printed models in areas of clinician and patient education, and pre-surgical simulation for complex cases of renal disease. Of five studies performing a quantitative analysis, the analysis of results displayed a high level of spatial and anatomical accuracy amongst models, with benefits including reducing estimated blood loss and risk of intra-operative complications. Fourteen studies evaluated manufacturing costs and time duration, with costs ranging from USD 1 to 1000 per model, and time duration ranging from 15 min to 9 days. This review shows that the use of customised 3D-printed models is valuable in the education of junior surgeons as well as the enhancement of operative skills for senior surgeons due to a superior visualisation of anatomical networks and pathologic morphology compared to volumetric imaging alone. Furthermore, 3D-printed kidney models may facilitate interdisciplinary communication and decision-making regarding the management of patients undergoing operative treatment for renal disease. It cannot be suggested that a more expensive material constitutes a higher level of user-satisfaction and model accuracy. However, higher costs in the manufacturing of the 3D-printed models reported, on average, a slightly shorter time duration for the 3D-printing process and total manufacturing time.

scholarly journals Stress, strain and deformation of poly-lactic acid filament deposited onto polyethylene terephthalate woven fabric through 3D printing process

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Prisca Aude Eutionnat-Diffo ◽  
Yan Chen ◽  
Jinping Guan ◽  
Aurelie Cayla ◽  
Christine Campagne ◽  
...  
Keyword(s):  
Lactic Acid ◽  
3D Printing ◽  
Tensile Properties ◽  
Polyethylene Terephthalate ◽  
Polymeric Materials ◽  
Deposition Process ◽  
Woven Fabric ◽  
Poly Lactic Acid ◽  
Printing Process ◽  
3D Printed

Abstract Although direct deposition of polymeric materials onto textiles through 3D printing is a great technique used more and more to develop smart textiles, one of the main challenges is to demonstrate equal or better mechanical resistance, durability and comfort than those of the textile substrates before deposition process. This article focuses on studying the impact of the textile properties and printing platform temperature on the tensile and deformations of non-conductive and conductive poly lactic acid (PLA) filaments deposited onto polyethylene terephthalate (PET) textiles through 3D printing process and optimizing them using theoretical and statistical models. The results demonstrate that the deposition process affects the tensile properties of the printed textile in comparison with the ones of the textiles. The stress and strain at rupture of the first 3D printed PLA layer deposited onto PET textile material reveal to be a combination of those of the printed layer and the PET fabric due to the lower flexibility and diffusion of the polymeric printed track through the textile fabric leading to a weak adhesion at the polymer/textile interface. Besides, printing platform temperature and textile properties influence the tensile and deformation properties of the 3D printed PLA on PET textile significantly. Both, the washing process and the incorporation of conductive fillers into the PLA do not affect the tensile properties of the extruded polymeric materials. The elastic, total and permanent deformations of the 3D-printed PLA on PET fabrics are lower than the ones of the fabric before polymer deposition which demonstrates a better dimensional stability, higher stiffness and lower flexibility of these materials.

scholarly journals 3D Printing: 3D Printed Functionally Graded Plasmonic Constructs (Advanced Optical Materials 18/2017)

2017 ◽  
Vol 5 (18) ◽  
Author(s):  
Alexander P. Haring ◽  
Assad U. Khan ◽  
Guoliang Liu ◽  
Blake N. Johnson
Keyword(s):  
3D Printing ◽  
Optical Materials ◽  
Functionally Graded ◽  
3D Printed

scholarly journals The Use of Composite Materials in 3D Printing

2020 ◽  
Vol 4 (2) ◽  
pp. 42 ◽  
Author(s):  
Ignazio Blanco
Keyword(s):  
Composite Materials ◽  
3D Printing ◽  
Rapid Prototyping ◽  
Polymer Matrix ◽  
Chemical Properties ◽  
Modified Polymer ◽  
Research Activities ◽  
Physico Chemical ◽  
3D Printed ◽  
Limited Spectrum

Nowadays, all production, from the smallest ones to large companies, and research activities are affected by the use of 3D printing technology. The major limitation, in order to cover as many fields of application as possible, is represented by the set of 3D printable materials and their limited spectrum of physico-chemical properties. To expand this spectrum and employ the 3D-printed objects in areas such as biomedical, mechanical, electronical and so on, the introduction of fibers or particles in a polymer matrix has been widely studied and applied. In this review, all those studies that proposed modified polymer presenting advantages associated with rapid prototyping are reported.

scholarly journals Comparison between Tests and Simulations Regarding Bending Resistance of 3D Printed PLA Structures

Polymers ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 4371
Author(s):  
Dorin-Ioan Catana ◽  
Mihai-Alin Pop ◽  
Denisa-Iulia Brus
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
3D Printing ◽  
Process Parameters ◽  
Bending Stress ◽  
Test Results ◽  
Printing Process ◽  
Simulation Process ◽  
Bending Resistance ◽  
3D Printed

Additive manufacturing is one of the technologies that is beginning to be used in new fields of parts production, but it is also a technology that is constantly evolving, due to the advances made by researchers and printing equipment. The paper presents how, by using the simulation process, the geometry of the 3D printed structures from PLA and PLA-Glass was optimized at the bending stress. The optimization aimed to reduce the consumption of filament (material) simultaneously with an increase in the bending resistance. In addition, this paper demonstrates that the simulation process can only be applied with good results to 3D printed structures when their mechanical properties are known. The inconsistency of printing process parameters makes the 3D printed structures not homogeneous and, consequently, the occurrence of errors between the test results and those of simulations become natural and acceptable. The mechanical properties depend on the values of the printing process parameters and the printing equipment because, in the case of 3D printing, it is necessary for each combination of parameters to determine their mechanical properties through specific tests.

scholarly journals Interactive robogami: An end-to-end system for design of robots with ground locomotion

2017 ◽  
Vol 36 (10) ◽  
pp. 1131-1147 ◽  
Author(s):  
Adriana Schulz ◽  
Cynthia Sung ◽  
Andrew Spielberg ◽  
Wei Zhao ◽  
Robin Cheng ◽  
...  
Keyword(s):  
3D Printing ◽  
Rapid Prototyping ◽  
Sheet Metal ◽  
User Satisfaction ◽  
Domain Knowledge ◽  
User Study ◽  
Computational Design ◽  
Turnaround Time ◽  
Skill Levels ◽  
Rapid Fabrication

This paper aims to democratize the design and fabrication of robots, enabling people of all skill levels to make robots without needing expert domain knowledge. Existing work in computational design and rapid fabrication has explored this question of customization for physical objects but so far has not been able to conquer the complexity of robot designs. We have developed Interactive Robogami, a tool for composition-based design of ground robots that can be fabricated as flat sheets and then folded into 3D structures. This rapid prototyping process enables users to create lightweight, affordable, and materially versatile robots with short turnaround time. Using Interactive Robogami, designers can compose new robot designs from a database of print-and-fold parts. The designs are tested for the users’ functional specifications via simulation and fabricated on user satisfaction. We present six robots designed and fabricated using a 3D printing based approach, as well as a larger robot cut from sheet metal. We have also conducted a user study that demonstrates that our tool is intuitive for novice designers and expressive enough to create a wide variety of ground robot designs.

Sign in / Sign up

Export Citation Format

Share Document