Representations: Reconciling Design for Disassembly Rules With Design for Manufacturing Rules

2012 ◽  
Author(s):  
Vikrant C. Rayate ◽  
Joshua D. Summers
Keyword(s):  
End Of Life ◽  
Design For Manufacturing ◽  
Design Rule ◽  
Design For Assembly ◽  
Specific Situation ◽  
Assembly Rules ◽  
Design For Disassembly ◽  
Design Rules ◽  
Relationship Types ◽  
Hypothetical Scenario

The paper presents a tool for selecting appropriate Design for Manufacturing and Design for Assembly rules during product design while considering Design for Disassembly rules and end-of-life recovery conditions. This tool exposes the relations between the various types of design rules and end-of-life recovery parameters. Four different relationship types are developed in this research: recovery conditions and recovery options relationship, Design for Disassembly rules and recovery options relationship, Design for Disassembly rules and recovery conditions relationship, Design for Disassembly rules, and Design for Manufacturing and Design for Assembly rules relationship. The purpose of this research is to build these relations and transform these relationships into a database. The database serves as tool from which design rules can be retrieved by running queries. In addition to design rule retrieval, the tool also shows the relationships with various design rules, recovery options, and recovery conditions. This provides designers with information as to which rules are in conflict and which are complementary for the specific situation under consideration. To illustrate this tool, it is applied to motor-drive assembly and thermal gun sight, which are already design products. Additionally the application of the tool is demonstrated using a hypothetical scenario which involves products like coffee cup, cell phone and stapler.

scholarly journals The Virtual Reality Scenario Method: Moving from Imagination to Immersion in Criminal Decision-making Research

2019 ◽  
Vol 56 (3) ◽  
pp. 451-480 ◽  
Author(s):  
Jean-Louis van Gelder ◽  
Reinout E. de Vries ◽  
Andrew Demetriou ◽  
Iris van Sintemaartensdijk ◽  
Tara Donker
Keyword(s):  
Decision Making ◽  
Virtual Reality ◽  
Perceived Risk ◽  
Stepwise Regression ◽  
Specific Situation ◽  
Emotional Experiences ◽  
Music Festival ◽  
Perceived Realism ◽  
Hypothetical Scenario ◽  
Scenario Method

Objectives: This study proposes an alternative hypothetical scenario method capitalizing on the potential of virtual reality (VR). Rather than asking participants to imagine themselves in a specific situation, VR perceptually immerses them in it. We hypothesized that experiencing a scenario in VR would increase feelings of being “present” in the situation, and add to perceived realism compared to the written equivalent. This, in turn, was expected to trigger stronger emotional experiences influencing subsequent behavioral intentions. Methods: In an experiment, participants ( N = 153), visitors of a large music festival, either read a “bar fight” scenario or experienced the scenario in VR. Following the scenario, they were presented a series of questions including intention to aggress, perceived risk, anticipated shame/guilt, presence, perceived realism, and anger. Analyses were conducted using analysis of variance, stepwise regression, and mediation analysis using nonparametric bootstrapping. Results: In line with expectations, the results indicate significant differences between conditions with the VR scenario triggering stronger presence, higher realism, and higher intention to aggress. Importantly, presence and anger mediated the relation between condition and intention to aggress. Conclusions: We show that the VR scenario method may provide benefits over written scenarios for the study of criminal decision-making. Implications are discussed.

Design for Assembly and Design for Manufacturing Study Case: Mid-Size Pickup-Box Reinforcement Application

2015 ◽  
Author(s):  
Alisson Sarmento ◽  
André Luiz J. Pereira ◽  
Lincoln Lima ◽  
Luciana Rodrigues
Keyword(s):  
Design For Manufacturing ◽  
Design For Assembly ◽  
Study Case

scholarly journals Hardware Design Rule Checker Using a CAM Architecture

VLSI Design ◽  
1996 ◽  
Vol 4 (2) ◽  
pp. 141-147
Author(s):  
Seokjin Kim ◽  
Ramalingam Sridhar
Keyword(s):  
Pattern Matching ◽  
Input Data ◽  
Hardware Implementation ◽  
Low Cost ◽  
Design Rule ◽  
Design Rules ◽  
One Dimensional ◽  
Content Addressable Memory ◽  
Logic Operations ◽  
Geometric Designs

This paper presents a hardware implementation of design rule checker using a specialized Content Addressable Memory(CAM) for the Manhattan geometric designs. Two dimensional relationships between rectangular objects in a design are checked with one dimensional design rules. The input data is processed by the pixel pre-processor in such a way that direct comparison between the input data and the stored rules in the CAM is possible. The comparison by the CAM reduces the number of memory references and logic operations of pattern matching and the simple architecture of the system enables a low cost implementation.

Design for Manufacturing & Assembly Approach in Realisation of Cryogenic Thrust Chamber

2015 ◽  
Vol 830-831 ◽  
pp. 95-99
Author(s):  
Alok Singh ◽  
Ravi Ranjan Kumar ◽  
Ashish Kumar Pande ◽  
P.V. Venkitakrishnan
Keyword(s):  
Holistic Approach ◽  
Design For Manufacturing ◽  
Product Launch ◽  
Design For Assembly ◽  
Thrust Chamber ◽  
Design Engineers ◽  
Full Production ◽  
Industrial Designers ◽  
Functional Teams ◽  
New Good

In the olden days the motto was "I designed it; you build it!" Design engineers worked alone and Designs were then thrown over the wall leaving manufacturing people with the dilemma how to manufacture. Often this delayed both the product launch and the time to ramp up to full production. In the new good days manufacturability can be assured by developing products in multi-functional teams with early and active participation from Manufacturing, Marketing (and even customers), Finance, Industrial Designers, Quality, Service, Purchasing, Vendors and factory works. The need for a holistic approach between design and manufacturing is required. The two concepts Design for Manufacturing & Design for Assembly has become the need of the hour. The heart of any design for manufacturing system is a group of design principles or guidelines that are structured to help the designer reduce the cost and difficulty of manufacturing an item.Realisation of Cryogenic thrust chamber includes various manufacturing processes like Forming, Welding, Machining and Brazing. During initial stages of Thrust chamber realisation problems like Forming of 1.7m long nozzle divergent from thin sheets, welding of various intricate geometries & assembly of critical parts were observed. Subsequently these problems were studied based on the holistic approach of Design for manufacturing & design for assembly. Improvements based on the above study were considered in design & critical processes modifications resulting in successful and timely realization of the thrust chamber.

Limit States Design for Onshore Pipelines: Designing for Hydrostatic Test Pressure and Restrained Thermal Expansion

2014 ◽  
Author(s):  
Riski H. Adianto ◽  
Maher A. Nessim
Keyword(s):  
Thermal Expansion ◽  
Input Parameter ◽  
Local Buckling ◽  
Companion Paper ◽  
Design Rule ◽  
Material Strength ◽  
Safety Factors ◽  
Limit States ◽  
Design Rules ◽  
Test Pressure

Reliability-based design rules have been developed for the key serviceability limit states applicable to onshore pipeline including local buckling due to thermal expansion and excessive plastic deformation under hydrostatic test pressure. The design rules are characterized by three elements: the formulas used to calculate the characteristic demand and capacity; the criteria used to define the characteristic values of the key input parameters to these formulas (such as diameter and material strength); and the safety factors defining the required excess capacity over the demand. The overall methodology used in developing the design rules and the practical implications of applying them are described in a companion paper. This paper describes the process used to calibrate safety factors and characteristic input parameter values that meet the desired reliability levels. The results show that local buckling under restrained thermal expansion is only potentially relevant for a small sub-set of cases and based on this, an explicit design rule was not developed. For excessive deformation under hydrostatic test pressure, two alternate design rules are provided; one stress based and the other strain based. The final design rules are described and an assessment of their accuracy and consistency in meeting the reliability targets is included. Guidance is also provided on the conditions in which each check is used.

New Common Design Rules for U-Tube Heat Exchangers in ASME, CODAP and UPV Codes

2002 ◽  
Author(s):  
F. Osweiller
Keyword(s):  
Heat Exchangers ◽  
Pressure Vessels ◽  
Design Rule ◽  
Technical Approach ◽  
Design Rules ◽  
Asme Code ◽  
European Code ◽  
Section Viii ◽  
Technical Basis ◽  
Year 2000

In year 2000, ASME Code (Section VIII – Div. 1), CODAP (French Code) and UPV (European Code for Unfired Pressure Vessels) have adopted the same rules for the design of U-tube tubesheet heat exchangers. Three different rules are proposed, based on different technical basis, to cover: • Tubesheet gasketed with shell and channel. • Tubesheet integral with shell and channel. • Tubesheet integral with shell and gasketed with channel or the reverse. At the initiative of the author, a more refined technical approach has been developed, to cover all tubesheet configurations. The paper explains the rationale for this new design rule which is being incorporated in ASME, CODAP and UPV in 2002. This is substantiated with comparisons to TEMA Standards and a benchmark of numerical comparisons.

Research on the Disassembly Design of the Used Cars

2010 ◽  
Vol 426-427 ◽  
pp. 303-307 ◽  
Author(s):  
Y. Liu
Keyword(s):  
Sustainable Development ◽  
End Of Life ◽  
Automotive Industry ◽  
Waste Recycling ◽  
Effective Model ◽  
Design For Disassembly ◽  
Key Recovery ◽  
Automotive Components ◽  
Used Cars ◽  
Recycling Techniques

Automotive components in the analysis of end-of-life recycling programs, based on the study of automobile recycling techniques and strategies; the establishment of the Waste Recycling automotive components model, a vehicle designed for Recycling and Design for Disassembly The criteria for the design. At the same time, the disassembly of the establishment of a design-oriented model of car design to explore the design for the disassembly of the key recovery technology, pointed out that the recycling-oriented design and design for disassembly is to save resources, reduce costs and realize the design of automotive products and green automotive industry to create an effective model of sustainable development one of the means.

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