Estimation and Simulation of Shape Deviation for Additive Manufacturing Prototypes

2016 ◽  
Author(s):  
Mohammad Taufik ◽  
Prashant K. Jain
Keyword(s):  
Additive Manufacturing ◽  
Significant Role ◽  
Fabrication Process ◽  
Combined Effect ◽  
Equal Size ◽  
Shape Deviation ◽  
Novel Technique ◽  
Shape Deviations ◽  
Efficient Alternative

Shape deviation is one of the major issues in fabricating a part using Additive Manufacturing (AM) technology. During the prototype fabrication process, slicing induced conditions play a significant role in varying shape deviations. This paper provides a novel technique for the estimation and simulation of shape deviation and provides a foundation to estimate the combined effect of oversize and undersize fabrication conditions on the same layer. The research described is the initial efforts to develop a shape deviation model regarding oversize, undersize, equal size and mixed size situations. To estimate and simulate the shape deviation, an algorithm is developed and examined with seven example tessellated prototypes. The advanced program will help the user to determine the different shape deviation information during slicing stage with different preprocessing parameters. The results show that the developed methodology is robust and work as an efficient alternative to shape deviation studies.

Design and Analysis of Hybrid Fused Filament Fabrication Apparatus for Fabrication of Composites

2021 ◽  
Vol 14 ◽  
Author(s):  
Aniket Yadav ◽  
Piyush Chohan ◽  
Ranvijay Kumar ◽  
Jasgurpreet Singh Chohan ◽  
Raman Kumar
Keyword(s):  
Additive Manufacturing ◽  
Composite Materials ◽  
Design Process ◽  
Low Cost ◽  
Matrix Material ◽  
Fabrication Process ◽  
Layer By Layer ◽  
Fused Filament Fabrication ◽  
Composite Manufacturing ◽  
Tool Paths

Background: Additive manufacturing is the most famous technology which requires materials or composites to be fabricated with layer by layer deposition strategy. Due to its lower cost, higher accuracy and less material wastage; this technology is used in almost every sector. But in many applications there is a need to alter the properties of a product in a certain direction with the help of some reinforcements. With the use of reinforcements, composite layers can be fabricated using additive manufacturing technique which will enhance the directional properties. A novel apparatus is designed to spray the reinforcement material into the printed structures in a very neat and precise manner. This spray nozzle is fully automated, which works according to tool-paths generated by slicing software. The alternate deposition of layers of reinforcement and build materials helped to fabricate customized composite products. Objective: The objective of present study is to design and analyze the working principle of novel technique which has been developed to fabricate composite materials using additive manufacturing. The apparatus is numerically controlled by computer according to CAD data which facilitates the deposition of alternate layers of reinforcement and matrix material. The major challenges during the design process and function of each component has been explored. Methods: The design process is initiated after comprehensive literature review performed to study previous composite manufacturing processes. The recent patents published by different patent offices of the world are studied in detail and analysis has been used to design a low cost composite fabrication apparatus. A liquid dispensing device comprises a storage tank attached with a pump and microprocessor. The microprocessor receives the signal from the computer as per tool paths generated by slicing software which decides the spray of reinforcements on polymer layers. The spraying apparatus moves in coordination with the primary nozzle of the Fused Filament Fabrication process. Results: The hybridization of Fused Filament Fabrication [process with metal spray process has been successfully performed. The apparatus facilitates the fabrication of low cost composite materials along with flexibility of complete customization of composite manufacturing process. The anisotropic behaviour of products can be easily controlled and managed during fabrication which can be used for different applications.

scholarly journals Additive manufacturing in medical sciences: past, present and the future

2018 ◽  
Vol 5 (1) ◽  
pp. 201
Author(s):  
Lakshya P. Rathore ◽  
Naina Verma
Keyword(s):  
Tissue Engineering ◽  
Additive Manufacturing ◽  
Biological Tissue ◽  
Patient Specific ◽  
Basic Fact ◽  
Medical Sciences ◽  
Novel Technique ◽  
Patient Specific Implants ◽  
Tissue Replacement ◽  
The Future

Additive manufacturing (AM) is a novel technique that despite having been around for more than 35 years, has been underutilized. Its great advantage lies in the basic fact that it is incredibly customizable. Since its use was recognized in various fields of medicine like orthopaedics, otorhinolaryngology, ophthalmology etc, it has proved to be one of the most promising developments in most of them. Customizable orthotics, prosthetics and patient specific implants and tracheal splints are few of its advantages. And in the future too, the combination of tissue engineering with AM is believed to produce an immense change in biological tissue replacement.

scholarly journals Bilateral mandibular premolars with tooth shape deviation: a rare dental anomaly

2014 ◽  
Vol 31 (01) ◽  
pp. 070-073
Author(s):  
G. Costa ◽  
F. Ramos-Perez ◽  
J. Castro ◽  
D. Perez
Keyword(s):  
Rare Case ◽  
Dental Arch ◽  
Shape Deviation ◽  
Tooth Shape ◽  
Dental Anomaly ◽  
Shape Deviations ◽  
Clinical Consequences

AbstractThe tooth shape deviations are rare dental anomaly described in premolars, characterized by to show simultaneously an increased mesio-distal dimension and decreased bucco-lingual dimension when compared with other normal teeth. The presence of such teeth with variation in size may be related to malocclusions, since there is a reduction in circumference of the dental arch. This report describes a rare case of bilateral tooth shape deviations in the two mandibular first premolars and discusses the prevalence of this condition and the eventual clinical consequences associated with this dental anomaly.

Novel moisture management test of polyethylene terephthalate and nylon fabric under stretching and surface patterning

2016 ◽  
Vol 88 (1) ◽  
pp. 69-79 ◽  
Author(s):  
Jingfeng Huang ◽  
Jackie New ◽  
Jingbin Tham ◽  
Alfred Tok
Keyword(s):  
Polyethylene Terephthalate ◽  
Significant Role ◽  
Absorption Rate ◽  
Surface Patterning ◽  
Actual Behavior ◽  
Pet Fabric ◽  
Moisture Management ◽  
Novel Technique ◽  
Nylon Fabric ◽  
Clamping Device

This report presents a novel technique to assess the moisture management test on uniformly stretched compression fabrics using a clamping device, which represents behavior close to the actual behavior when worn, the effects of stretching on hydrophobic/hydrophilic and surface patterning on polyethylene terephthalate (PET) and nylon fabrics. The wicking behaviors of stretching, coating and patterning are discussed. We report that (1) coated compression fabrics were found to enhance moisture management based on the bottom spreading speed, top absorption rate and one-way transport capability criteria, (2) stretching plays a significant role in moisture management and (3) the best moisture management performance was exhibited by the hydrophobic inner and hydrophilic outer-coated PET fabric, under stretched conditions.

scholarly journals A novel technique for the production of electrospun scaffolds with tailored three-dimensional micro-patterns employing additive manufacturing

2014 ◽  
Vol 6 (3) ◽  
pp. 035003 ◽  
Author(s):  
Catherine M Rogers ◽  
Gavin E Morris ◽  
Toby W A Gould ◽  
Robert Bail ◽  
Sotiria Toumpaniari ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Three Dimensional ◽  
Electrospun Scaffolds ◽  
Novel Technique ◽  
Micro Patterns

Jewelry Fabrication via Selective Laser Melting of Glass

2014 ◽  
Author(s):  
Miranda Fateri ◽  
Andreas Gebhardt
Keyword(s):  
Additive Manufacturing ◽  
Selective Laser Melting ◽  
Process Parameters ◽  
Glass Powder ◽  
Fabrication Process ◽  
Complex Geometries ◽  
Laser Melting ◽  
Conventional Methods

Selective Laser Melting (SLM) is one of the Additive Manufacturing (AM) technologies applicable for producing complex geometries which are typically expensive or difficult to fabricate using conventional methods. This process has been extensively investigated experimentally for various metals and the fabrication process parameters have been established for different applications; however, fabricating 3D glass objects using SLM technology has remained a challenge so far although it could have many applications. This paper presents a summery on various experimental evaluations of a material database incorporating the build parameters of glass powder using the SLM process for jewelry applications.

Lithography-Based Ceramic Manufacturing: A Novel Technique for Additive Manufacturing of High-Performance Ceramics

2014 ◽  
Vol 88 ◽  
pp. 60-64 ◽  
Author(s):  
Martin Schwentenwein ◽  
Peter Schneider ◽  
Johannes Homa
Keyword(s):  
Additive Manufacturing ◽  
High Performance ◽  
Bending Strength ◽  
New Technology ◽  
High Accuracy ◽  
Ceramic Suspension ◽  
Novel Technique ◽  
Ceramic Manufacturing ◽  
Manufacturing Technologies ◽  
Very High

Albeit widely established in plastic and metal industry, additive manufacturing technologies are still a rare sight in the field of ceramic manufacturing. This is mainly due to the requirements for high performance ceramic parts, which no additive manufacturing process was able to meet to date.The Lithography-based Ceramic Manufacturing (LCM)-technology which enables the production of dense and precise ceramic parts by using a photocurable ceramic suspension that is hardened via a photolithographic process. This new technology not only provides very high accuracy, it also reaches high densities for the sintered parts. In the case of alumina a relative density of over 99.4 % and a 4-point-bending strength of almost 430 MPa were realized. Thus, the achievable properties are similar to conventional manufacturing methods, making the LCM-technology an interesting complement for the ceramic industry.

scholarly journals Customized Gingival Retraction Cord using Additive Manufacturing: A Novel Technique

2021 ◽  
Vol 13 (16) ◽  
pp. 84-87
Author(s):  
A. Hemavardhini ◽  
V. Vidyashree Nandini ◽  
Mathivathani S P ◽  
Shiney Boruah
Keyword(s):  
Additive Manufacturing ◽  
Novel Technique
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