A New Methodology for Ease-of-Disassembly in Product Design

2000 ◽  
Author(s):  
Devdas Shetty ◽  
Ken Rawolle ◽  
Claudio Campana
Keyword(s):  
Product Design ◽  
State Of The Art ◽  
Aerospace Industry ◽  
Integrated Design ◽  
Design Principles ◽  
Design For Disassembly ◽  
Design Processes ◽  
Current State ◽  
Current Product ◽  
Useful Life

Abstract As manufacturers are becoming responsible for their products when they reach the end of their operational lives, the dismantling of products has emerged as one of the serious part of this exercise. In situations involving integrated design principles, certain assembly procedures or joining techniques can make it very difficult to disassemble a product and to separate materials into non-contaminated groups. The strategy is to begin including design for disassembly guidelines in the current product design processes. Design for Disassembly (DFD) is a design philosophy that requires consideration to be given for a product or a part, even after it is in service. The inclusion of procedures for design for disassembly, recyclability and re-manufacture will save resources by prolonging the useful life of product. The paper initially examines the current state of the art in the area of Design for Disassembly and looks at the existing methodologies that are applicable to product design. A new methodology based on a combination of charts based on damage rating, tool rating, re-use rating and access-area rating is proposed. The methodology is compared with the existing methods and evaluated for various situations in aerospace industry.

Opportunities and Challenges in Mesoforming

2003 ◽  
Author(s):  
Jian Cao ◽  
Zhong Wang ◽  
Neil Krishnan ◽  
Anthony Michael Swanson
Keyword(s):  
Energy Consumption ◽  
Environmental Monitoring ◽  
Product Design ◽  
Automotive Industry ◽  
State Of The Art ◽  
Preliminary Investigation ◽  
Industrial Processing ◽  
Current State ◽  
Processing Energy

In the last ten years, miniaturization technologies have revolutionized product design and have lead to many innovative applications in the automotive industry, healthcare, environmental monitoring, industrial processing, energy consumption, defense, etc. Here, the current state-of-the-art in mesoforming (forming of metals in the scale of 0.1 mm to several millimeters) is reviewed, followed by our preliminary investigation of one mesoforming example.

scholarly journals Exploring an AM-Enabled Combination-of-Functions Approach for Modular Product Design

Designs ◽  
2018 ◽  
Vol 2 (4) ◽  
pp. 37 ◽  
Author(s):  
Charul Chadha ◽  
Kathryn Crowe ◽  
Christina Carmen ◽  
Albert Patterson
Keyword(s):  
Product Design ◽  
State Of The Art ◽  
Free Form ◽  
Life Cycle Costs ◽  
Modular Product ◽  
Current State ◽  
Modular Products ◽  
Design And Manufacturing ◽  
Complex Parts

This work explores an additive-manufacturing-enabled combination-of-function approach for design of modular products. AM technologies allow the design and manufacturing of nearly free-form geometry, which can be used to create more complex, multi-function or multi-feature parts. The approach presented here replaces sub-assemblies within a modular product or system with more complex consolidated parts that are designed and manufactured using AM technologies. This approach can increase the reliability of systems and products by reducing the number of interfaces, as well as allowing the optimization of the more complex parts during the design. The smaller part count and the ability of users to replace or upgrade the system or product parts on-demand should reduce user risk, life-cycle costs, and prevent obsolescence for the user of many systems. This study presents a detailed review on the current state-of-the-art in modular product design in order to demonstrate the place, need and usefulness of this AM-enabled method for systems and products that could benefit from it. A detailed case study is developed and presented to illustrate the concepts.

Design Process Elicitation Through the Evaluation of Integrated Model Structures

1999 ◽  
Author(s):  
David R. Wallace ◽  
Shaun M. Abrahamson ◽  
Nicholas P. Borland
Keyword(s):  
Product Design ◽  
Design Process ◽  
Integrated Design ◽  
Lead Times ◽  
Software Module ◽  
Design Processes ◽  
Design Structure ◽  
Service Relationships ◽  
Design Resources ◽  
High Level

Abstract Refinement of product design processes is recognized as a means for organizations to impact lead times, cost, and quality. Although methods such as the design structure matrix (DSM) exist to analyze design processes, their applications have been limited by overhead in collecting data and maintaining accurate representations. Representation timeliness and resolution issues have typically led to static, high-level process views. In this work, the design process is derived dynamically from an evolving network of design resources inter-related by service dependencies. This network is created to simulate the state of a product design. Through the analysis of resulting dependencies, high-resolution networks of task and parameter interdependency can be extracted. A software module is developed to provide the service of automatically extracting and analyzing the structure of service exchanges in integrated design models. The module provides a matrix or DSM visualization of service relationships and mechanisms to sort resources according to service priority. This allows for realtime evaluation of design processes as models of the product evolve, providing information to guide the strategic addition of resources.

Enhancing Design for Disassembly: A Benchmark of DFD Software Tools

1996 ◽  
Author(s):  
Matthew J. Hrinyak ◽  
Bert Bras ◽  
William F. Hoffman
Keyword(s):  
Product Design ◽  
Software Tools ◽  
Design For Disassembly ◽  
Design Processes

Abstract Manufacturers are becoming responsible for their products when they reach the end of their operational lives. Disassembly will be an integral part of this new responsibility. The logical remedy is to begin including design for disassembly guidelines and analyses in existing product design processes. Software tools have been and continue to be developed to perform such analyses. However, not all of these tools are of equal caliber and we cannot expect designers to use all of the tools that are available to them. In this paper, we examine four existing software tools available to designers for inclusion in their design processes. We compare the results from each of the software tools and show how the growing pool of potential software tools can be prioritized according to how they best meet the needs of designers.

scholarly journals Exploring an AM-Enabled Combination-of-Functions Approach for Modular Product Design

2018 ◽  
Author(s):  
Charul Chadha ◽  
Kathryn Crowe ◽  
Christina Carmen ◽  
Albert Patterson
Keyword(s):  
Product Design ◽  
State Of The Art ◽  
Free Form ◽  
Life Cycle Costs ◽  
Modular Product ◽  
Current State ◽  
Modular Products ◽  
Design And Manufacturing ◽  
Complex Parts

This work explores an additive-manufacturing-enabled combination-of-function approach for design of modular products. AM technologies allow the design and manufacturing of nearly free-form geometry, which can be used to create more complex, multi-function or multi-feature parts. The approach presented here replaces sub-assemblies within a modular product or system with more complex single parts that are designed and manufactured using AM technologies. This approach can increase the reliability of systems and products by reducing the number of interfaces, as well as allowing the optimization of the more complex parts during the design. The smaller part count and the ability of users to replace or upgrade the system or product parts on-demand should reduce user risk, life-cycle costs, and prevent obsolescence for the user of many systems. This study presents a detailed review on the current state-of-the-art in modular product design in order to demonstrate the place, need and usefulness of this AM-enabled method for systems and products that could benefit from it. A detailed case study is developed and presented to demonstrate the concepts.

scholarly journals REVIEW OF METAMODELING TECHNIQUES FOR PRODUCT DESIGN WITH COMPUTATION-INTENSIVE PROCESSES

2011 ◽  
Author(s):  
G. Gary Wang ◽  
S. Shan
Keyword(s):  
Product Design ◽  
Future Development ◽  
State Of The Art ◽  
Design Problems ◽  
Improve Efficiency ◽  
Large Size ◽  
Current State ◽  
Design Challenges

Computation-intensive design problems are becoming increasingly common, especially for large-size manufacturers such as those in the aerospace, automotive, and electronics industries. The computation burden is often caused by expensive analysis and simulation processes. Approximation or metamodeling techniques are often used to model these computation-intensive processes in order to improve efficiency. This work will review the current state-of-the-art on metamodeling-based techniques in support of product design. The review is organized from a practitioner’s perspective according to the role of metamodeling in supporting design. Challenges and future development of metamodeling will also be analyzed and discussed.

Behavioral Genetics: Concepts for Research and Practice in Language Development and Disorders

1995 ◽  
Vol 38 (5) ◽  
pp. 1126-1142 ◽  
Author(s):  
Jeffrey W. Gilger
Keyword(s):  
Language Development ◽  
Behavioral Genetics ◽  
State Of The Art ◽  
Genetic Research ◽  
Great Promise ◽  
Behavioral Genetic ◽  
Fine Grained ◽  
Future Goals ◽  
Current State ◽  
Research Designs

This paper is an introduction to behavioral genetics for researchers and practioners in language development and disorders. The specific aims are to illustrate some essential concepts and to show how behavioral genetic research can be applied to the language sciences. Past genetic research on language-related traits has tended to focus on simple etiology (i.e., the heritability or familiality of language skills). The current state of the art, however, suggests that great promise lies in addressing more complex questions through behavioral genetic paradigms. In terms of future goals it is suggested that: (a) more behavioral genetic work of all types should be done—including replications and expansions of preliminary studies already in print; (b) work should focus on fine-grained, theory-based phenotypes with research designs that can address complex questions in language development; and (c) work in this area should utilize a variety of samples and methods (e.g., twin and family samples, heritability and segregation analyses, linkage and association tests, etc.).

Schizophrenia Research: Current State of the Art

1976 ◽  
Vol 21 (7) ◽  
pp. 497-498
Author(s):  
STANLEY GRAND
Keyword(s):  
State Of The Art ◽  
Current State

Umbral Calculus

10.37236/24 ◽  
2002 ◽  
Vol 1000 ◽  
Author(s):  
A. Di Bucchianico ◽  
D. Loeb
Keyword(s):  
19Th Century ◽  
Finite Differences ◽  
State Of The Art ◽  
Umbral Calculus ◽  
Current State ◽  
Logical Foundation ◽  
Complete Bibliography ◽  
The 19Th Century ◽  
Mathematical Literature

We survey the mathematical literature on umbral calculus (otherwise known as the calculus of finite differences) from its roots in the 19th century (and earlier) as a set of “magic rules” for lowering and raising indices, through its rebirth in the 1970’s as Rota’s school set it on a firm logical foundation using operator methods, to the current state of the art with numerous generalizations and applications. The survey itself is complemented by a fairly complete bibliography (over 500 references) which we expect to update regularly.

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