A Review of Part Filtering Methods for Additive Manufacturing

2020 ◽  
Author(s):  
Jennifer E. Bracken ◽  
Christopher McComb ◽  
Timothy W. Simpson ◽  
Kathryn W. Jablokow
Keyword(s):  
Additive Manufacturing ◽  
Research Literature ◽  
Use Cases ◽  
Advantages And Disadvantages ◽  
Part Selection ◽  
Filtering Techniques

Abstract As additive manufacturing (AM) increases in popularity, many companies seek to identify which parts can be produced via AM. This has led to new areas of research known as “part filtering”, “part selection”, or “part identification” for AM. Numerous methods have been proposed to quantify the suitability of a design to be made with AM, and each has its own benefits and drawbacks. This paper reviews popular methods of part filtering and elaborates on the advantages and disadvantages of the various approaches. The approaches for part filtering, and the example methods, are categorized and sorted along a continuum of opportunistic and restrictive methods in order to clarify use cases for various part filtering techniques. The approaches are also examined through the lens of specificity of process, as some are designed to be process agnostic, while others are customized for a specific AM technology or even a specific AM system. Finally, current gaps that exist in the part filtering research literature are discussed to help identify necessary and promising directions for future investigation.

scholarly journals An analysis of mobility management for mobile sensor nodes in MWSN

2018 ◽  
Vol 232 ◽  
pp. 04078
Author(s):  
Min Zhang ◽  
Jun-Bin Liang
Keyword(s):  
Mobility Management ◽  
Research Literature ◽  
Sensor Nodes ◽  
Mobile Sensor ◽  
Existing Problems ◽  
Advantages And Disadvantages ◽  
Management Schemes ◽  
Mobile Sensor Nodes ◽  
Mobile Wireless Sensor ◽  
Efficiency Data

Mobile wireless sensor networks (MWSN) are composed of a large number of mobile sensor nodes, which are used to collect data. MWSN have been widely applied in a variety of harsh environments, so mobile sensor nodes are often at risk of damage. How to manage mobile sensor nodes is an important issue. In this paper, we analyse different mobility management schemes proposed in some typical research literature and classify these schemes by using three features: the collaboration between mobile sensor nodes, routing and deployment in MWSN. We specify advantages and disadvantages of the proposed schemes, compare different key parameters of MSWN respectively, including energy efficiency, data delay, cost and lifetime, etc. Finally, we discuss existing problems of MWSN management and give some helpful suggestions in this area.

Insourcing and Outsourcing of Library Technology

2020 ◽  
pp. 59-66
Author(s):  
Edward Iglesias
Keyword(s):  
Use Cases ◽  
Electronic Resources ◽  
Resources Management ◽  
Advantages And Disadvantages ◽  
Individual Use ◽  
Library Technology

This article traces the movement of library technology from in-house systems created and maintained by library personnel to outsourced products bought from and largely controlled by vendors. As well as documenting these changes observations will be made concerning strategic advantages and disadvantages of this move. Focus will be limited to six areas of library technology: OPAC, Discovery Layer, MARC Records, Bindery, Acquisitions and ERM (Electronic Resources Management). Some may argue that these are all components of a central ILS that are created and available. This is true in some cases but not others. For example, Innovative Interfaces has always had an Acquisitions module whereas other ILSs have not. Many libraries still use a spreadsheet or other method to keep track of serials where others have migrated to an ERM. Individual use cases will be covered to demonstrate the benefits and shortcomings of each system.

scholarly journals Additive Friction Stir-Enabled Solid-State Additive Manufacturing for the Repair of 7075 Aluminum Alloy

2019 ◽  
Vol 9 (17) ◽  
pp. 3486 ◽  
Author(s):  
R. Joey Griffiths ◽  
Dylan T. Petersen ◽  
David Garcia ◽  
Hang Z. Yu
Keyword(s):  
Aluminum Alloy ◽  
Additive Manufacturing ◽  
Solid State ◽  
Side Wall ◽  
Fusion Welding ◽  
7075 Aluminum Alloy ◽  
Hole Filling ◽  
Friction Stir ◽  
Advantages And Disadvantages ◽  
Through Hole

The repair of high strength, high performance 7075 aluminum alloy is essential for a broad range of aerospace and defense applications. However, it is challenging to implement it using traditional fusion welding-based approaches, owing to hot cracking and void formation during solidification. Here, the use of an emerging solid-state additive manufacturing technology, additive friction stir deposition, is explored for the repair of volume damages such as through -holes and grooves in 7075 aluminum alloy. Three repair experiments have been conducted: double through-hole filling, single through-hole filling, and long, wide-groove filling. In all experiments, additive friction stir deposition proves to be effective at filling the entire volume. Additionally, sufficient mixing between the deposited material and the side wall of the feature is always observed in the upper portions of the repair. Poor mixing and inadequate repair quality have been observed in deeper portions of the filling in some scenarios. Based on these observations, the advantages and disadvantages of using additive friction stir deposition for repairing volume damages are discussed. High quality and highly flexible repairs are expected with systematic optimization work on process control and repair strategy development in the future.

scholarly journals How to Formulate for Structure and Texture via Medium of Additive Manufacturing-A Review

Foods ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 497 ◽  
Author(s):  
Azarmidokht Gholamipour-Shirazi ◽  
Michael-Alex Kamlow ◽  
Ian T. Norton ◽  
Tom Mills
Keyword(s):  
Additive Manufacturing ◽  
Food Industry ◽  
Food Product ◽  
Great Promise ◽  
Advantages And Disadvantages ◽  
Nutritional Needs ◽  
Full Discussion ◽  
Printed Materials ◽  
Food Printing ◽  
3D Food Printing

Additive manufacturing, which is also known as 3D printing, is an emerging and growing technology. It is providing significant innovations and improvements in many areas such as engineering, production, medicine, and more. 3D food printing is an area of great promise to provide an indulgence or entertaining experience, personalized food product, or specific nutritional needs. This paper reviews the additive manufacturing methods and materials in detail as well as their advantages and disadvantages. After a full discussion of 3D food printing, the reports on edible printed materials are briefly presented and discussed. In the end, the current and future outlook of additive manufacturing in the food industry is shown.

Implementation of Additive Manufacturing Business Models

2015 ◽  
Vol 794 ◽  
pp. 547-554 ◽  
Author(s):  
Max Lutter-Günther ◽  
Christian Seidel ◽  
Tobias Kamps ◽  
Gunther Reinhart
Keyword(s):  
Additive Manufacturing ◽  
Paradigm Shift ◽  
Process Model ◽  
Business Models ◽  
Implementation Process ◽  
Use Cases ◽  
Industrial Practice ◽  
Wide Range ◽  
Interdisciplinary Character ◽  
Specific Technology

For the application of Additive Manufacturing (AM), a wide range of use cases are applied in industrial practice. The technological potentials of AM enable specific business models, which characterise how AM utilisation adds value to a company’s business. For the implementation of AM, a paradigm shift is required on an operational and strategic level, making it necessary to adjust processes and structures. Herein, the interdisciplinary character of the technology needs to be taken into account. In this paper, a typology of AM business models is derived from specific technology potentials, providing orientation in the field of AM use cases. Furthermore, a top down approach is pursued in order to develop an implementation process model, which assists companies when considering AM adoption. It enables companies to identify suitable AM business models and points out fields of actions necessary for implementation. Since the implementation depends on the AM business model at scope, also guidelines that provide measures on a more detailed level are presented.

scholarly journals PLANNING SOLUTIONS FOR SPACES FOR REMOTE OPERATION

2021 ◽  
Vol 9 (4) ◽  
pp. 86-90
Author(s):  
Ol'ga Shirokova ◽  
Alena Pavlyuk
Keyword(s):  
Regulatory Framework ◽  
Use Cases ◽  
Remote Work ◽  
Advantages And Disadvantages ◽  
Planning Decisions ◽  
Remote Operation ◽  
Work At Home ◽  
Negative Factors ◽  
At Home

This article explores the possibilities of remote work. A definition is given, a regulatory framework is identified. The main advantages and disadvantages are analyzed. The negative factors that make it difficult to carry out work at home are identified. To compensate for the proposed use cases of spaces, also called co-working spaces. For the organization of remote work, there are five groups of needs. To meet the needs of the appropriate jobs. These are isolated rooms, open areas, meeting rooms, creative workshops, and rooms for group activi-ties. Typical modular planning solutions consisting of four zones: an office zone, which includes the listed types of premises, a zone of administrative and office premises, a zone of administrative and office premises, a leisure and rec-reation area. If necessary, the possibility of planning decisions is provided.

scholarly journals Analysis and characterization of additive manufacturing processes

2021 ◽  
Vol 13 (4) ◽  
pp. 167-180
Author(s):  
Andra TOFAN-NEGRU ◽  
Cristian BARBU ◽  
Amado STEFAN ◽  
Ioana-Carmen BOGLIS
Keyword(s):  
Additive Manufacturing ◽  
Complex Geometry ◽  
Cutting Tools ◽  
Manufacturing Processes ◽  
Layer By Layer ◽  
Advantages And Disadvantages ◽  
Finishing Processes ◽  
Short Time ◽  
Physical Phenomena ◽  
Am Processes

Recently, additive manufacturing (AM) processes have expanded rapidly in various fields of the industry because they offer design freedom, involve layer-by-layer construction from a computerized 3D model (minimizing material consumption), and allow the manufacture of parts with complex geometry (thus offering the possibility of producing custom parts). Also, they provide the advantage of a short time to make the final parts, do not involve the need for auxiliary resources (cutting tools, lighting fixtures or coolants) and have a low impact on the environment. However, the aspects that make these technologies not yet widely used in industry are poor surface quality of parts, uncertainty about the mechanical properties of products and low productivity. Research on the physical phenomena associated with additive manufacturing processes is necessary for proper control of the phenomena of melting, solidification, vaporization and heat transfer. This paper addresses the relevant additive manufacturing processes and their applications and analyzes the advantages and disadvantages of AM processes compared to conventional production processes. For the aerospace industry, these technologies offer possibilities for manufacturing lighter structures to reduce weight, but improvements in precision must be sought to eliminate the need for finishing processes.

scholarly journals Towards a Cyber-Constructivist Perspective (CCP) of Educational Design

2003 ◽  
Vol 29 (1) ◽  
Author(s):  
Rocci Luppicini
Keyword(s):  
Learning Environments ◽  
Research Literature ◽  
Constructivist Learning ◽  
Educational Design ◽  
Advantages And Disadvantages ◽  
Constructivist Learning Environments ◽  
Communications Theory ◽  
Constructivist Perspective ◽  
Theoretical Paper ◽  
Advance Knowledge

This theoretical paper utilizes cybernetic-based approaches (Bopry, 1999; Wiener, 1954) and communications theory (Habermas, 1984,1990; Krippendorff, 1994) to advance knowledge of constructivist learning. I argue that past educational research literature on constructivist learning is partly responsible for limiting how educational designers conceptualize individual and collaborative learning environments. A cyber-constructivist perspective (CCP) is explored as a tool for increasing awareness of factors that may contribute to effective constructivist educational design (ED) within learning communities. I discuss advantages and disadvantages of adopting a CCP in the design of constructivist learning environments.

Steering column support topology optimization including lattice structure for metal additive manufacturing

2020 ◽  
pp. 095440622094712
Author(s):  
S Mantovani ◽  
GA Campo ◽  
M Giacalone
Keyword(s):  
Additive Manufacturing ◽  
Bulk Material ◽  
Optimization Methods ◽  
Functionally Graded ◽  
Lattice Structures ◽  
Advantages And Disadvantages ◽  
Thin Walled Structures ◽  
Wide Range ◽  
Thin Walled ◽  
Graded Lattice

Structural engineering in the automotive industry has moved towards weight reduction and passive safety whilst maintaining a good structural performance. The development of Additive Manufacturing (AM) technologies has boosted design freedom, leading to a wide range of geometries and integrating functionally-graded lattice structures. This paper presents three AM-oriented numerical optimization methods, aimed at optimizing components made of: i) bulk material, ii) a combination of bulk material and graded lattice structures; iii) an integration of solid, lattice and thin-walled structures. The optimization methods were validated by considering the steering column support of a mid-rear engine sports car, involving complex loading conditions and shape. The results of the three methods are compared, and the advantages and disadvantages of the solutions are discussed. The integration between solid, lattice thin-walled structures produced the best results, with a mass reduction of 49.7% with respect to the existing component.

scholarly journals Design and Optimization of Lattice Structures: A Review

2020 ◽  
Vol 10 (18) ◽  
pp. 6374
Author(s):  
Chen Pan ◽  
Yafeng Han ◽  
Jiping Lu
Keyword(s):  
Topology Optimization ◽  
Additive Manufacturing ◽  
Voronoi Tessellation ◽  
High Strength ◽  
Research Literature ◽  
Main Concern ◽  
Lattice Structures ◽  
Uniform Lattice ◽  
And Topology ◽  
Bio Engineering

Cellular structures consist of foams, honeycombs, and lattices. Lattices have many outstanding properties over foams and honeycombs, such as lightweight, high strength, absorbing energy, and reducing vibration, which has been extensively studied and concerned. Because of excellent properties, lattice structures have been widely used in aviation, bio-engineering, automation, and other industrial fields. In particular, the application of additive manufacturing (AM) technology used for fabricating lattice structures has pushed the development of designing lattice structures to a new stage and made a breakthrough progress. By searching a large number of research literature, the primary work of this paper reviews the lattice structures. First, based on the introductions about lattices of literature, the definition and classification of lattice structures are concluded. Lattice structures are divided into two general categories in this paper: uniform and non-uniform. Second, the performance and application of lattice structures are introduced in detail. In addition, the fabricating methods of lattice structures, i.e., traditional processing and additive manufacturing, are evaluated. Third, for uniform lattice structures, the main concern during design is to develop highly functional unit cells, which in this paper is summarized as three different methods, i.e., geometric unit cell based, mathematical algorithm generated, and topology optimization. Forth, non-uniform lattice structures are reviewed from two aspects of gradient and topology optimization. These methods include Voronoi-tessellation, size gradient method (SGM), size matching and scaling (SMS), and homogenization, optimization, and construction (HOC). Finally, the future development of lattice structures is prospected from different aspects.

Sign in / Sign up

Export Citation Format

Share Document