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Development of an Architecture for a Hybrid Manufacturing Information System (2000)

Chung, W. C. ; Lau, H.

Springer

Engineering with computers 16 (2000), S. 1-9

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ISSN: 1435-5663

Keywords: Key words. Data exchange; Database system; Data model; Manufacturing information system; Rule knowledge database; Turnkey system

Source: Springer Online Journal Archives 1860-2000

Topics: Computer Science , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology

Notes: Abstract. In a previous paper, the concept of a Generic Non Standard-specific Information Flow System (GNSIFS) was discussed [1]. The main feature of GNSIFS is that it can perform data exchange among a group of manufacturing systems, regardless of the operating systems or standards being used. Further research in this field shows that, to enhance the capability of GNSIFS, the database system of GNSIFS, which is considered to be the key constituent of the whole system, should consist of a relational data model that is to be complemented with a free format data model. In addition, the ‘reasoning’ capability of this information flow system can also be advanced if a Rule Knowledge DataBase (RKDB), together with the associated inference engine, can be included in the GNSIFS, resulting in the formation of a Hybrid Manufacturing Information System (HMIS) which manages the information flow from a combination of relational, free format and rule knowledge data models. This hybrid information management feature is favourable to the progressive advancement of the ‘reasoning’ nature of the system, and at the same time, has the benefit of relational data processing. This paper describes the architecture required for the formation of this Hybrid Manufacturing Information System (HMIS), and tests this system in a real company to evaluate its viability in an industrial environment.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s003660050031

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Controlled energy dissipation in fibrous composites I. Controlled delamination (1987)

Jang, B. Z. ; Lieu, Y. K. ; Chung, W. C. ; [et al.]

Brookfield, Conn. : Wiley-Blackwell

Polymer Composites 8 (1987), S. 94-102

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ISSN: 0272-8397

Keywords: Chemistry ; Chemical Engineering

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Notes: Delamination mechanisms in continuous fiber reinforced composites were investigated. The concept of controlled interlaminar bonding (CIB) is proposed as a guideline for preparing fiber-epoxy composite laminates with enhanced fracture toughness without significant degradation in strength properties. The interlaminar bonding was manipulated by several specialized techniques including insertion of delamination promotors and surface modification of laminae. Results indicated that the plane-strain fracture toughness of E-glass-epoxy laminates could be improved by inserting perforated interlaminar films of aluminum, paper, polyester and polyimide, and fabrics. Such interlayers were used to promote delamination which dissipate strain energy by blunting and diverting a propagating crack. The fracture resistance of a laminate was found to be dependent on the degree of delamination. The competition between the growth of delamination cracks and the propagation of a main crack is controlled by the relative magnitude of the interlaminar bonding strength and the lamina cohesive strength. The interlaminar bonding is controlled by the degree of interlayer perforation and the adhesion between interlayer and lamina. The loading direction was found to be very important in dictating the failure processes. Experimental results from several composite systems are presented and discussed along with post-failure analysis data.

Additional Material: 10 Ill.