机械设计外文原文

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机械设计外文原文A knowledge-based system for materials selection in
mechanical engineering design
S.M. Sapuan
() Ad
ancedMaterials Research Center， Institute of Ad
anced Technology ITMA ， Uni
ersiti Putra Malaysia， 43400 Serdang， Selangor，
Malaysia
Received 21 July 2000; accepted 4 December 2000
Abstract
This paper studies various work on the development of computerized material selection system. The importance of
Ž. knowledge-based system KBS in the context of concurrent engineering is explained. The study of KBS in material selection in
an engineering design process is described. The development in materials databases， which sometimes serve as material selection
packages， is also discussed. The use of KBS in material selection and the application in the domain of polymeric-based composite
are chosen as typical examples.
2001 Published by Elsevier Science Ltd.
Keywords: Material selection; Knowledge-based system; Materials database; Polymeric-based composite; Concurrent engineering; Mechanical
engineering design
1. Introduction
Materials selection is a task normally carried out by
design and materials engineers. Gutteridge and Water-
 man 1 described the aim of materials selection as the
identification of materials， which after appropriate
manufacturing operations， will have the dimensions，
shape and properties necessary for the product or
component to demonstrate its required function at the
lowest cost. For the purpose of material selection，
thousands of data would be needed to characterize all
the grades of materials. Many selection systems are
available to help design engineers to choose the most
suitable materials. At the most basic level， design engi-
neers could use tables of material properties in data
books. However， data sheets are incomplete and once
published， they are difficult to update.
 Dodd and Fairfull 2 described how information
about engineering materials， can be divided into two
Ž. E-mail address: sapuan###eng.upm.edu.my S.M. Sapuan .
main categories， i.e. data and knowledge. Data is de-
fined as the results of measurements， whereas
knowledge represents the connections between items
of data， the source of this knowledge， which contributes
to an understanding of the results. Both the computer-
ized database and the KBS of material selection will be
described in the following sections.
2. The material database for materials selection
2.1. Supporting data and rigorous logic for the hypothesis
and obser
ation
In recent years， attention is being made to the use of
computer systems to store and process data regarding
the properties of materials. It enables the designers to
achieve large capacity and rapid retrieval from a com-
puter database to provide easy access to the materials
data.
 According to Prasad 3 ， materials are the common
elements enumerating parts in a product realization
0261-306901$ - see front matter
2001 Published by Elsevier Science Ltd.
Ž. PII: S 0 2 6 1 - 3 0 6 9 0 0 00108-4