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Open Access. Powered by Scholars. Published by Universities.®

National Taiwan Ocean University

1995

Articles 1 - 6 of 6

Full-Text Articles in Engineering

Engineering Properties And Application Of Cement-Based Fly Ash Blocks, R. Huang, J.J. Chang, W. Yeih Jun 1995

Engineering Properties And Application Of Cement-Based Fly Ash Blocks, R. Huang, J.J. Chang, W. Yeih

Journal of Marine Science and Technology

Under the consideration of environmental protection, direct disposal of coal ash is not acceptable. It is required to solidify fly ash before ocean disposal or land disposal. The objective of this study is to investigate the properties and the possible applications of the solid blocks produced from fly ash. Thirty-six mixes have been proportioned using different cementing materials such as portland cement, lime, sludge treatment compound, and industrial silica slag. Extensive laboratory studies have been conducted to evaluate the block properties such as compressive strength, tensile strength, abrasion resistance, and soundness. In addition, the possible engineering application is also evaluated. …

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Aggregate Effect On Elastic Moduli Ofcement-Based Composite Materials, C.C. Yang, R. Huang, W. Yeih, I.C. Sue Jun 1995

Aggregate Effect On Elastic Moduli Ofcement-Based Composite Materials, C.C. Yang, R. Huang, W. Yeih, I.C. Sue

Journal of Marine Science and Technology

The elastic moduli of cement-based composite materials with different types of aggregates were investigated in this study. Twelve mixes with various volume fractions (10%, 20%, and 30% ) were selected. Cylindrical specimens with a dimension of ∮ 10 x 20 cm were cast and tested. Electric strain gages were used and elastic moduli were obtained from the stressstrain curves. Theoretical moduli were calculated based on H-S bounds and micromechanics. Test results show that the types and volume fractions of aggregates significantly affect the elastic moduli of concrete composite materials and the theoretical predictions fairly agree with the experimental data.

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Optimization Of Design Parameters For Spines Of Various Geometries, Rong-Hua Yeh Jun 1995

Optimization Of Design Parameters For Spines Of Various Geometries, Rong-Hua Yeh

Journal of Marine Science and Technology

This work presents a systematic study on the optimum base diameter, length, heat dissipation, temperature profile, and efficiency of spines by employing fin parameter versus fin efficiency method. The temperature dependent heat transfer coefficient is assumed to be a power-law type. Several common fin geometries including cylindrical, convex parabolic, conical, and concave parabolic profiles are investigated respectively. It is found that the optimum dimensions of spines are functions of fin volume, heat transfer coefficient at fin base, and thermal conductivity. To facilitate the thermal design of heat transfer components, simple mathematical expressions as well as design charts are presented.

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Note On Effect Of Elastic Deformation At The Root Of A Cantilever Beam, M.T. Liang, D.B. Chan Jun 1995

Note On Effect Of Elastic Deformation At The Root Of A Cantilever Beam, M.T. Liang, D.B. Chan

Journal of Marine Science and Technology

Parkes neglected elastic strains and examined a classical problem of rigid- plastic structural dynamics for finding the deformation of a cantilever beam carrying a mass at its tip which is subjected to a short pulse loading. Symonds and Fleming examined the Parkes problem by making comparison between exact numerical solutions obtained from an ABAQUS program for an elastic-plastic beam and the rigid-plastic solution slightly modified to allow for large deformation. Further observation is acquired by comparision also with a simplified elastic-plastic approach based on treatment of elastic and plastic action in artificially separated stages. and Yu examined the Parkes problem …

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A Calculation Method For Transport Properties For The Prediction Of Combustion Characteristics Of Marine Fuel Oils, Cherng-Yuan Lin, Tze-Chin Pan, Cheh-Shiung Chen Jun 1995

A Calculation Method For Transport Properties For The Prediction Of Combustion Characteristics Of Marine Fuel Oils, Cherng-Yuan Lin, Tze-Chin Pan, Cheh-Shiung Chen

Journal of Marine Science and Technology

The primary purpose of this study is to propose a calculation method of transport properties in numerical studies on the combustion of marine diesel fuel oils which are composed of undefined hydrocarbon components and various extents of immiscible matters. This proposed method is further applied to the theoretical analysis for the combustion model for a single liquid droplet. It is shown that fuel oil A has the properties of higher flame temperature and burning rate constant while lower stand-off ratio and mass burning rate than those of heavy fuel oil C. The proposed calculation procedure is also suggested to be …

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Simplified Procedure For Evaluating Soil Liquefaction Characteristics, Shuh-Gi Chern, Tain-Shyang Chang Jun 1995

Simplified Procedure For Evaluating Soil Liquefaction Characteristics, Shuh-Gi Chern, Tain-Shyang Chang

Journal of Marine Science and Technology

The purpose of this paper is to develop a mathematical model for the evaluation of liquefaction characters for soil subjected to earthquake induced cyclic loading. Cyclic triaxial test results are used to develop the basic model. It is then used to evaluate cyclic shear strength τR, number of cycles required to cause liquefaction Nι or failure condition Nf , and the generation of excess pore water pressure Ug. The development of this model is a great breakthrough for the evaluation of liquefaction characteristics for soils under earthquake loadings.

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