Components for Composite Material Customization System

2009 ◽  
Author(s):  
Soumitra Nandi ◽  
Zahed Siddique
Keyword(s):  
Composite Materials ◽  
Material Selection ◽  
Selection Process ◽  
Material Design ◽  
Optimization Techniques ◽  
Conventional Approach ◽  
Wide Range ◽  
Properties Of Materials ◽  
Selection Of

With the advancements of composite materials and research in nano-composites, designers have the flexibility to select materials from a wide range of properties to meet their specific design needs. Even with all these advancements, the material selection process during design follows a very conventional approach. The conventional approach to material design is to select a certain material from a given pre-set material list that allows the attainment of nearest properties required for the product. One of the disadvantages of this approach is that the trade-off inherent in the selection of material, when multiple properties are targeted, can be cumbersome to achieve or addressed at all. In this paper we present an approach to select and design composite materials, where the designer will have flexibility to select multiple properties of materials during the design of a new product. This approach employs an index for selection combined with heuristic optimization techniques to select the optimized combination of composite materials that could meet closest possible property goals. In the case study presented in this paper, we did not perform any optimization; rather, emphasize is given to the explanation of material selection technique, and an RMS value is introduced as an index for the selection.

scholarly journals Optimization of Building Components with Sustainability Aspects in BIM Environment

2018 ◽  
Author(s):  
Mostafa Khanzadi ◽  
Ali Kaveh ◽  
Mohammad Rastegar Moghaddam ◽  
Seyyed Mohammad Pourbagheri
Keyword(s):  
Sustainable Development ◽  
Energy Saving ◽  
Building Materials ◽  
Selection Process ◽  
Optimal Combination ◽  
Wide Range ◽  
Procurement Cost ◽  
Building Components ◽  
Selection Of

In recent decades, the variety of building materials has grown a great deal causing the selection of suitable materials from a wide range of candidates to be complex and difficult. One of the main criteria to be considered in this area, besides reducing procurement cost, is paying attention to various aspects affecting the dimensions of sustainable development, such as increasing energy saving, applying recyclable materials and localization.This paper proposes a framework in the BIM environment - as one of the successful approaches in the AEC industry - which allows the project stakeholders to choose the most desired and optimal combination for their building components with least human interference in the selection process makes systematic choices. In order to achieve the purposes embedded in the framework phases, several methods such as ENSCBO, DEA and VIKOR have been utilized in order to evaluate and depict the selection process, this is implemented as a Revit plugin and eventually applied to a case study.

scholarly journals A Grammatical Approach for Customization of Laminated Composite Materials

2010 ◽  
Author(s):  
Soumitra Nandi ◽  
Zahed Siddique ◽  
M. Cengiz Altan
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Volume Fraction ◽  
Material Selection ◽  
Laminated Composite ◽  
Component Selection ◽  
Wide Range ◽  
Laminated Composite Materials ◽  
Component Shape ◽  
Selection Of

The wide range of properties covered by the manufacturable fiber-matrix combinations of composite materials, along with their directional property characteristics, provides designers with material selection flexibility during designing composite material products. Meeting multiple property goals, however, complicates the design process as both the composite material selection and the component shape formation become complicated because the loading conditions and matrix calculations are needed to determine theoretical value of composite material properties. This paper presents a grammatical approach to simultaneously consider the shape and selection composite materials for a load-bearing component. Selection of composites involve determining the fiber and matrix, their volume fraction, and number of layers in different location of the component. A hip-replacement joint is designed using composite material to illustrate the approach.

Research on Material Selection with Multi-Attribute Decision Method and G1 Method

2014 ◽  
Vol 952 ◽  
pp. 20-24 ◽  
Author(s):  
Xue Jun Xie
Keyword(s):  
Material Selection ◽  
Selection Process ◽  
Selection Problem ◽  
Topsis Method ◽  
Attribute Weight ◽  
Multi Attribute Decision Making ◽  
Judgment Matrix ◽  
Optimal Material ◽  
Selection Of ◽  
Better Than

The selection of an optimal material is an important aspect of design for mechanical, electrical, thermal, chemical or other application. Many factors (attributes) need to be considered in material selection process, and thus material selection problem is a multi-attribute decision making (MADM) problem. This paper proposes a new MADM method for material selection problem. G1 method does not need to test consistency of the judgment matrix. Thus it is better than AHP. In this paper, firstly, we use the G1 method to determine the attribute weight. Then TOPSIS method is used to calculate the closeness of the candidate materials with respect positive solution. A practical material selection case is used to demonstrate the effectiveness and feasibility of the proposed method.

scholarly journals Sustainable Construction by Means of Improved Material Selection Process

2019 ◽  
Vol 3 (1) ◽  
pp. 85 ◽  
Author(s):  
Koorosh Gharehbaghi ◽  
Maged Georgy
Keyword(s):  
Energy Savings ◽  
Material Selection ◽  
Selection Process ◽  
Sustainable Construction ◽  
Construction Operation ◽  
Selection Factors ◽  
Strength And Durability ◽  
Operation Cost ◽  
Selection Of

Whilst sustainable construction relates to both a building’s structure and the use of proper life cycle processes, the selection of the most appropriate material/s is deemed a considerable undertaking. Throughout a building’s lifecycle that extends from design, construction, operation, maintenance, renovation, until demolition, the selection of sustainable material/s is a particularly crucial task for the development and establishment of such structures. Traditionally, there are three main materials for general construction: (1) Steel, (2) Concrete and (3) Timber. These materials not only influence the function within the structure, but also affect the operation cost and energy usage. Operation cost reduction and energy savings are typically elements of the sustainable construction sphere. However, in developing countries, there is a variety of highly critical factors, which can impact material selection as well as the long-term sustainability of the structure, including: Fire Performance, Environmental Impact, Structural Performance (strength and durability), and Functioning Capabilities. Accordingly, this paper will first compare the sustainability of these three key materials and then converse with appropriate processes for material selection. Attention will be given to the sustainable construction recompense associated with the different material selection factors. Doing so ensures a more sustainable built environment by means of an improved material selection process.

scholarly journals Processo seletivo de tutores da UAB da UFAL: aspectos para uma seleção criteriosa e significativa

2015 ◽  
Vol 14 (3) ◽  
pp. 545-560
Author(s):  
Rosana Sarita de Araujo
Keyword(s):  
Selection Process ◽  
Legal Aspects ◽  
Legal Basis ◽  
Case Study Methodology ◽  
Proof Of Knowledge ◽  
Palabras Clave ◽  
Study Methodology ◽  
Investigación Cualitativa ◽  
Selection Of

Resumo: O trabalho discute o processo seletivo de tutores da UAB da UFAL, considerando os aspectos legais, bem como os aspectos técnico-pedagógicos que traduzem a seleção como criteriosa e significativa. Caracterizada como pesquisa qualitativa utiliza a metodologia de estudo de caso e de comparação para estudo de dois editais da UFAL de processos seletivos de tutores. A análise dos dados aponta as limitações que a legislação delineia para a seleção de tutores, as diferenças nos índices de aprovação dos candidatos em relação às etapas utilizadas no processo de seleção, os impactos da prova de conhecimento versus entrevista, bem como demonstra a crescente credibilidade do processo de seleção de tutores da UFAL.   Palavras-chave: Seleção de tutores. Base legal. Aspectos pedagógicos Abstract: The work discusses the selection process of the UAB tutors from UFAL, considering the legal aspects, as well as pedagogical and technical aspects that reflect the selection as judicious and significant. Characterized as qualitative research it uses the case study methodology and comparison for the study of two UFAL public notices for the selective processes of tutors. Data analysis points out the limitations that legislation delineates for the selection of tutors, differences in approval rates of candidates regarding the steps used in the selection process, the impacts of proof of knowledge versus interview, and it also demonstrates the growing credibility of the UFAL tutors selection process. Keywords: Selection of tutors. Legal basis. Pedagogical aspects Resumen: En este trabajo se discute el proceso de selección de los tutores de la UAB UFAL, considerando los aspectos legales , así como los aspectos técnicos y pedagógicos que traducen la selección minunciosa y significativa. Caracterizado como investigación cualitativa utiliza la metodología de estudio de caso y comparación con el estudio de dos convocatorias de la UFAL de procesos de selección de tutores. La análisis de los datos muestran las limitaciones que la legislación esboza para seleccionar los tutores, las diferencias en los índices de aprobación de los candidato en relación a las fases utilizadas en el proceso de selección , el impacto de la prueba de conocimientos frente a la entrevista , y demuestra la credibilidad creciente del proceso de selección de tutores de la UFAL . Palabras clave: Selección de tutores. Base legal. Aspectos pedagógicos 

Multi-Criteria Selection of Wind Turbine Using TOPSIS Approach

2020 ◽  
Author(s):  
Shafiqur Rehman ◽  
Salman A. Khan ◽  
Luai M. Alhems
Keyword(s):  
Wind Turbine ◽  
Wind Farm ◽  
Selection Process ◽  
Geographical Location ◽  
Real Data ◽  
Maximum Energy ◽  
Decision Criteria ◽  
Topsis Approach ◽  
Selection Of

Abstract The recent revolution in the use of renewable energy worldwide has opened many dimensions of research and development for sustainable energy. In this context, the use of wind energy has received notable attention. One critical decision in the development of a wind farm is the selection of the most appropriate turbine compatible with the characteristics of the geographical location under consideration in order to harness maximum energy. This selection process considers multiple decision criteria which are often in conflict with each other, as improving one criterion negatively affects one or more other criteria. Therefore, it is desired to find a tradeoff solution where all selection criteria are simultaneously optimized to the best possible level. This paper proposes a TOPSIS (The Technique for Order of Preference by Similarity to Ideal Solution) based approach for multi-criteria selection of wind turbine. Three decision criteria, namely, hub height, wind speed, and net capacity factor are used in the decision process. A case study is shown on real data collected from the Aljouf region located at an altitude of 753 meters above sea level in the northern part of Saudi Arabia. Seventeen turbines with rated capacities ranging from 1.5 GW to 3 GW from various manufacturers are evaluated. Results indicate that Vestas V110 turned out to be the most appropriate turbine for the underlying site.

Investigating Barriers That May Influence the Implementation and Use of E-HRM Tools in the Organization

2021 ◽  
pp. 350-370
Author(s):  
Hamid Agahi ◽  
Sarist Gulthawatvichai
Keyword(s):  
Human Resource ◽  
Selection Process ◽  
Business Sector ◽  
Human Resource Managers ◽  
Structured Interviews ◽  
Resource Managers ◽  
Recruitment And Selection ◽  
Study Participants ◽  
Selection Of

Human resource managers (HRMs) can use electronic-human resource management (E-HRMs) tools to improve human resources practices, including recruitment and selection of employees. Grounded in the theoretical framework of a unified theory of acceptance (UTAUT), this present qualitative case study investigated the potential barriers that influence the implementation and use of E-HRMs in Thailand's business sector. Human resource professionals from the business sector, including hotels in Thailand, were the study participants. Semi-structured interviews with open-ended questions were used as data collection instruments. Qualitative data collected was analyzed using thematic content analysis. The challenges impact the recruitment and selection process by making the employment process complex and poor selection of employees. HRMs should support E-HRMs as the advanced technologies to improve recruitment and selection of competent employees. In conclusion, E-HRMs are effective information systems that support electronic recruitment and selection of qualified employees.

Airstrip Site Selection in Coastal Labrador

1981 ◽  
Vol 35 (1) ◽  
pp. 17-25
Author(s):  
J. D. Innes ◽  
E. H. Smith ◽  
Allan Fiander
Keyword(s):  
Site Selection ◽  
Coastal Area ◽  
State Of The Art ◽  
Selection Process ◽  
Geometric Design ◽  
Digital Mapping ◽  
Data Requirements ◽  
Selection Of ◽  
Design Techniques

This paper examines a case study of the selection of nine airstrip sites in the coastal area of Labrador. The procedure used involved the procurement of better mapping for the site selection process. The benefits of this process are examined in the context of the data requirements for good airstrip selection. The site selection process is then examined utilizing state of the art digital mapping and computerized geometric design techniques.

Selection of Leak Detection Systems by Aggregation of Experts’ Judgment

2014 ◽  
Author(s):  
Sirous Yasseri
Keyword(s):  
Decision Maker ◽  
Selection Process ◽  
Leak Detection ◽  
Fuzzy Topsis ◽  
Detection Systems ◽  
Good Compromise ◽  
Criteria For Selection ◽  
Selection Of

Numerous leak detection systems (LDS) using a variety of technologies are on the market. Since LDS are designed for a particular use, then the evaluation and selection process requires suitable metrics and involvement from all stakeholders. This paper proposes to use15 criteria for selection of LDS. Each criterion is first rated for their importance by a number of experts. Then, the same experts are asked to rate a list of candidate LDSs. Fuzzy TOPSIS is used to aggregate Experts’ judgment. A case study is presented to demonstrate the application of the method. This method would indicate how a good compromise might look like. This could aid the decision-maker to weigh options and set priority and decide on a system.

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