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El sheikhy R A I

Crack path prediction using computer model fracture mechanics analysis

Abstract: A general approach of crack path technique during fracture process is developed according to " Directional Fracture approach " (DFA). This technique is presented for cracks under kth-mixzd mode tension-shear and compression-shear. It is applied for all directional fracture criteria [S , G , S, , Ge . x] . The hypothesis of this technique depend on the hypothesis of the used criterion , crack angle@), crack length (a), fracture increment length (r), and fracture angle@) . Computer programs using Quick Basic language are developed . Several examples of cracked specimens have been analysed covering the experimentally tested samples recording a good agreement.

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Series: ecce:1997 (browse)
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Ge Ji and O. Burkan Isgor

On The Numerical Solution Of Laplace's Equation With Nonlinear Boundary Conditions For Corrosion Of Steel In Concrete

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Full text: content.pdf (788,422 bytes) (available to registered users only)

Series: w78:2006 (browse)
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Ge X J, Lam K C, Cheung S O

Virtual soil laboratory: an exemplar of e-learning in construction

Abstract: Web-based teaching and learning have become increasingly popular, both for institutional and personal lifelong learning. Learning through the web enables students to structure their pace of study. In addition, the demand on resources such as educators? time and space can be reduced. The objective of the paper is to describe learning theory and how people learn through a constructivist approach. The paper also describes the development of a web based virtual soil laboratory and its realization, followed by highlighting the benefits of the system. It is concluded that the virtual laboratory is a supportive teaching aid and students have benefit from "learn how to learn" through constructivist approach of learning.

Keywords: virtual soil laboratory, constructivist approach, simulation, web-based teaching and learning

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Full text: content.pdf (495,699 bytes) (available to registered users only)

Series: itaec:2004 (browse)
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