scholarly journals A Study on Similarity Measure Functions on Engineering Materials Selection

2011 ◽  
Author(s):  
Doreswamy
Keyword(s):  
Similarity Measure ◽  
Materials Selection ◽  
Engineering Materials

scholarly journals A Comprehensive Report on Ultrasonic Attenuation of Engineering Materials, Including Metals, Ceramics, Polymers, Fiber-Reinforced Composites, Wood, and Rocks

2020 ◽  
Vol 10 (7) ◽  
pp. 2230 ◽  
Author(s):  
Kanji Ono
Keyword(s):  
Rayleigh Scattering ◽  
Ultrasonic Attenuation ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Test Results ◽  
Fiber Reinforced ◽  
Materials Selection ◽  
Linear Frequency ◽  
Engineering Materials ◽  
Non Destructive

In this paper, ultrasonic attenuation of engineering materials is evaluated comprehensively, covering metals, ceramics, polymers, fiber-reinforced composites, wood, and rocks. After verifying two reliable experimental methods, 336 measurements are conducted and their results are tabulated. Attenuation behavior is determined over broadband spectra, extending up to 15 MHz in low attenuating materials. The attenuation spectra are characterized in combination with four power law terms, with many showing linear frequency dependence, with or without Rayleigh scattering. Dislocation damping effects are re-evaluated and a new mechanism is proposed to explain some of the linear frequency dependencies. Additionally, quadratic and cubic dependencies due to Datta–Kinra scattering and Biwa scattering, respectively, are used for some materials to construct model relations. From many test results, some previously hidden behaviors emerged upon data evaluation. Effects of cold working, tempering, and annealing are complex and sometimes contradictory. Comparison to available literature was attempted for some, but most often prior data were unavailable. This collection of new attenuation data will be of value in materials selection and in designing structural health monitoring and non-destructive inspection protocols.

The New Trade-Offs in Engineering Materials Selection

1976 ◽  
Author(s):  
Edward K. Gray ◽  
Roy W. Mcleefe
Keyword(s):  
Materials Selection ◽  
Trade Offs ◽  
Engineering Materials

Application of Distance Evaluation and its Improved Algorithms in Engineering Materials Selection

2007 ◽  
Vol 353-358 ◽  
pp. 2758-2761 ◽  
Author(s):  
T.Y. Zhang ◽  
Rui Chen Yang
Keyword(s):  
Low Temperature ◽  
Euclidean Distance ◽  
Materials Selection ◽  
Ahp Method ◽  
Storage Container ◽  
Low Temperature Storage ◽  
Engineering Materials ◽  
Optimal Material ◽  
Selection Of ◽  
Temperature Storage

Distance evaluation and its improved algorithms using Vertical distance instead of Euclidean distance were discussed in engineering materials selection. Taking the selection of materials for low temperature storage container as an example, based on eight kinds of evaluation indices, according to the weight obtained by AHP method, ten kinds of candidate materials were evaluated by using distance evaluation and its improved algorithms. The results indicate that, the optimal material selected coincides with the practice of industry, and the sequence of the candidate materials arranged using improved algorithms is more reliable, which shows that improved algorithms of distance evaluation is a feasible and effective way for engineering materials selection.

Computerized Materials Selection

1973 ◽  
Vol 95 (4) ◽  
pp. 197-201 ◽  
Author(s):  
D. P. Hanley ◽  
E. Hobson
Keyword(s):  
Decision Making ◽  
Material Properties ◽  
Materials Selection ◽  
Material Parameters ◽  
Computer Aided ◽  
Engineering Materials ◽  
Balance Factor ◽  
Analytical Approaches ◽  
Selection Of

Two analytical approaches are described for computer-aided selection of engineering materials. With given design or selection properties in mind, various materials within a given class may be rated by means of minimization procedures in conjunction with assignable engineering judgment factors. The first approach uses a geometric analogy in which two encompassing material parameters—“mean weighted characteristic” and “balance factor”—are used as a measure of the closeness of fit to a shape defined by desired material properties. The second approach is a variation on a familiar algebraic aid to decision making. In the latter approach materials are selected with the least total sum of property deviations from those desired. A number of examples dealing with plastics are given. Comparisons are made between the two approaches. Both approaches offer advantages over “hit and miss” procedures. By segmenting material classes and by limiting the number of material properties, an iterative and useful program has been proven on a minicomputer.

Literature Review Prevention and Reduction of Plastic Waste in European Automotive Producers

2003 ◽  
Vol 19 (2) ◽  
pp. 117-134
Author(s):  
Alexis Baltazar y Jimenez
Keyword(s):  
Literature Review ◽  
End Of Life ◽  
Automotive Industry ◽  
Plastic Waste ◽  
Materials Selection ◽  
Plastic Recycling ◽  
Critical Issues ◽  
Engineering Materials

This paper discusses the issue of plastic recycling in the European automotive industry, specifically the plastic waste generated through end-of-life vehicles (ELV). It also explores the existing relationship between engineering materials selection, and what are considered to be the critical issues currently present in the automotive recycling field. Research found that although a new set of recycling technologies has been developed, an increase in the protection of the environment might end in reduced margins for the automobile manufacturers, in addition to a rise in the costs of recycling.

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