A Material Selection Model of Mechanical Products Based on Total Life Cycle Design

2011 ◽  
Vol 84-85 ◽  
pp. 310-316
Author(s):  
Liang He ◽  
Wan Lin Guo
Keyword(s):  
Life Cycle ◽  
Material Selection ◽  
Transformation Method ◽  
Selection Model ◽  
Design Stage ◽  
Assessment Index ◽  
Early Design Stage ◽  
Life Cycle Design ◽  
Mechanical Products ◽  
Total Life

Material selection in mechanical products based on total life cycle design is a complicated work, which should be studied systematically. A material selection model of mechanical products based on total life cycle design was proposed. A set of candidate materials were screened out, and then assessed according to the technical, economic and environmental assessment index. The candidate materials were ranked by using by using Z-transformation method in each of the assessment index. Different weights were assigned to each of the three assessment indexes, and global assessment was carried out according to different strategies or requirements which pay more attention to technical, economic or environmental performance of the material product used. A case in selecting aircraft structure element material was studied. The analysis results showed that the method could rank the candidate materials and selected out the “optimized material”, and the influence of the subjectivity of designer was reduced. The method provides some practical values for preliminary material selection in the early design stage of the mechanical products based on life cycle design.

Compatibility Analysis of Product Design for Recyclability and Reuse

1994 ◽  
Author(s):  
Patrick Di Marco ◽  
Charles F. Eubanks ◽  
Kos Ishii
Keyword(s):  
Life Cycle ◽  
Cost Function ◽  
Product Design ◽  
Material Selection ◽  
Computer Tool ◽  
Compatibility Analysis ◽  
Life Cycle Design ◽  
Environmentally Responsible ◽  
Qualitative Knowledge ◽  
Selection For

Abstract This paper describes a method for evaluating the compatibility of a product design with respect to end-of-life product retirement issues, particularly recyclability. Designers can affect the ease of recycling in two major areas: 1) ease of disassembly, and 2) material selection for compatibility with recycling methods. The proposed method, called “clumping,” involves specification of the level of disassembly and the compatibility analysis of each remaining clump with the design’s post-life intent; i.e., reuse, remanufacturing, recycling, or disposal. The method uses qualitative knowledge to assign a normalized measure of compatibility to each clump. An empirical cost function maps the measure to an estimated cost to reprocess the product. The method is an integral part of our life-cycle design computer tool that effectively guides engineers to an environmentally responsible product design. A refrigerator in-door ice dispenser serves as an illustrative example.

scholarly journals Design Implications and Opportunities of Considering Fatigue Strength, Manufacturing Variations and Predictive LCC in Welds

Metals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1527
Author(s):  
Mathilda Karlsson Hagnell ◽  
Mansoor Khurshid ◽  
Malin Åkermo ◽  
Zuheir Barsoum
Keyword(s):  
Life Cycle ◽  
Fatigue Strength ◽  
Life Cycle Cost ◽  
Design Stage ◽  
Direct Result ◽  
Welded Structures ◽  
Early Design Stage ◽  
Repair Costs ◽  
Welded Structure ◽  
Cost Reductions

Fatigue strength dictates life and cost of welded structures and is often a direct result of initial manufacturing variations and defects. This paper addresses this coupling through proposing and applying the methodology of predictive life-cycle costing (PLCC) to evaluate a welded structure exhibiting manufacturing-induced variations in penetration depth. It is found that if a full-width crack is a fact, a 50% thicker design can result in life-cycle cost reductions of 60% due to reduced repair costs. The paper demonstrates the importance of incorporating manufacturing variations in an early design stage to ensure an overall minimized life-cycle cost.

An intelligent system for estimating full product Life Cycle Cost at the early design stage

2008 ◽  
Vol 3 (2/3) ◽  
pp. 96 ◽  
Author(s):  
Haifeng Liu ◽  
Vivekanand Gopalkrishnan ◽  
Wee Keong Ng ◽  
Bin Song ◽  
Xiang Li
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Product Life Cycle ◽  
Intelligent System ◽  
Design Stage ◽  
Product Life ◽  
Early Design ◽  
Early Design Stage

Multiobjective optimisation method for life-cycle design of mechanical products

2010 ◽  
Vol 3 (2) ◽  
pp. 81-94 ◽  
Author(s):  
Kenji Doi ◽  
Masataka Yoshimura ◽  
Shinji Nishiwaki ◽  
Kazuhiro Izui
Keyword(s):  
Life Cycle ◽  
Multiobjective Optimisation ◽  
Life Cycle Design ◽  
Mechanical Products

scholarly journals Analysis and Assessment of the Building Life Cycle. Indicators and Tools for the Early Design Stage

2021 ◽  
Vol 13 (11) ◽  
pp. 6467
Author(s):  
Roberto Giordano ◽  
Federica Gallina ◽  
Benedetta Quaglio
Keyword(s):  
Carbon Dioxide ◽  
Life Cycle ◽  
Environmental Impact ◽  
Carbon Dioxide Emissions ◽  
Energy Content ◽  
Primary Energy ◽  
Embodied Energy ◽  
Design Stage ◽  
Early Design Stage ◽  
Carbon Dioxide Co2

Construction is a crucial sector in terms of worldwide environmental impacts. Building material production along with transport and demolition are no exception, because in the last decades, they have constantly increased their carbon dioxide (CO2) emissions. Actions and initiatives are therefore important to tackle the relationship between buildings and climate change. Particularly, it is necessary to develop Life Cycle Assessment (LCA) tools useful to calculate the environmental impact of buildings and to make them accessible to designers and stakeholders acting in the building sector. The article aims to contribute to the international debate about environmental assessment indicators for buildings and the simplified LCA based tools. The Embodied Energy (EE) and the Embodied Carbon (EC) have been investigated. The former, related to primary energy content; the latter, associated with the equivalent carbon dioxide emissions. EE and EC have been used as indicators for the development of a calculation tool named EURECA, for assessing the environmental impact of the building over its life cycle, as defined by the EN 15978:2011 standard. The Solar Decathlon Latin America and Caribbean’s house designed and built by an international academic team has been an opportunity to check the indicators and the tool’s effectiveness.

scholarly journals Toward LCA-lite: A Simplified Tool to Easily Apply LCA Logic at the Early Design Stage of Building in Australia

2019 ◽  
Vol 8 (5) ◽  
pp. 383 ◽  
Author(s):  
Toktam B. Tabrizi ◽  
Arianna Brambilla
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impact ◽  
Environmental Performance ◽  
Building Design ◽  
Design Stage ◽  
Effective Parameters ◽  
Early Design ◽  
Early Design Stage ◽  
Knowledge Based

Life Cycle Assessment (LCA), developed over 30 years ago, has been helpful in addressing a growing concern about the direct and indirect environmental impact of buildings over their lifetime. However, lack of reliable, available, comparable and consistent information on the life cycle environmental performance of buildings makes it very difficult for architects and engineers to apply this method in the early stages of building design when the most important decisions in relation to a building’s environmental impact are made. The LCA quantification method with need of employing complex tools and an enormous amount of data is unfeasible for small or individual building projects. This study discusses the possibility of the development of a tool that allows building designers to more easily apply the logic of LCA at the early design stage. Minimising data requirements and identifying the most effective parameters that promise to make the most difference, are the key points of simplification method. The conventional LCA framework and knowledge-based system are employed through the simplification process. Results of previous LCA studies in Australia are used as the specific knowledge that enable the system to generate outputs based on the user’s inputs.Keywords: Life Cycle Assessment (LCA), early design stage, most effective parameters, life cycle environmental performance

scholarly journals DESIGN STAGE IN THE LIFE CYCLE OF AN OPTICAL DEVICE

2021 ◽  
Vol 6 ◽  
pp. 172-175
Author(s):  
Alexandr U. Lepen
Keyword(s):  
Life Cycle ◽  
Creative Process ◽  
Product Life Cycle ◽  
Optical Devices ◽  
Information Support ◽  
Design Stage ◽  
Software Environment ◽  
Specific Knowledge ◽  
Product Life ◽  
Life Cycle Design

Any product, including optical devices, during its existence goes through a series of states from the idea of creation to disposal, which is called the product life cycle. Design is a complex and creative process of a specialist (designer), invariant to various types and complexity of devices. Designing requires the designer to in addition to special, subject-specific knowledge, as well as knowledge of the methodology, tools and rules for the implementation of project procedures. Modern design of optical devices is carried out in a software environment, the so-called the system of information support of the product life cycle, which makes it necessary for students to master the appropriate software.

Product Life-Cycle Modeling and Evaluation at the Conceptual Design Stage: A Digraph and Matrix Approach

2010 ◽  
Vol 132 (9) ◽  
Author(s):  
A. Anand ◽  
M. F. Wani
Keyword(s):  
Life Cycle ◽  
Product Life Cycle ◽  
Design Stage ◽  
Evaluation Procedure ◽  
Matrix Approach ◽  
Product Life ◽  
Life Cycle Design ◽  
Design Attributes ◽  
Step Procedure ◽  
Digraph And Matrix Approach

An evaluation procedure for product life-cycle design at the conceptual stage is presented using a digraph and matrix approach. Life-cycle design attributes are identified and used to evaluate a life-cycle design index. The ideal value of this index is also obtained, which is useful in assessing the relative life-cycle design value of product design alternatives. A step-by-step procedure for the evaluation of the life-cycle design index is presented and illustrated by means of two examples.

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