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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
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Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 891 to 900 of 255161 (0.169 seconds)| 891 |
Statistical analysis of reinforcing steel propertiesLim, Wai Tat January 1991 (has links)
The previous Grade 275 and Grade 380 reinforcing steels have been respectively replaced by Grade 300 and Grade 430 steels confirming to the new standard NZS 3402, released in December 1989. Grade 300 is similar to, but a little stronger than, the previous Grade 275. Grade 430 has a significantly higher yield strength, lower strain hardening rate and is more ductile and readily weldable when compared to the old Grade 380.
This project was carried out to investigate the distribution of mechanical properties for NZS 3402 Grade 300, and the micro-alloyed Grade 430 reinforcing steel manufactured by Pacific Steel Ltd. The investigation was based on data supplied by Pacific Steel Ltd and on data generated from mechanical tests carried out in the Materials Laboratory of the Mechanical Engineering Department, University of Canterbury. Tensile testing was carried out on the supplied material in the as rolled (deformed reinforcing bar) condition and on standard tensile specimens machined from these bars. One machined tensile specimen was pre-strained 5% and artificially aged to determine a strain ageing index for each cast supplied.
For both grades of steel distributions of lower yield strength, tensile strength, elongation at fracture, Luder strain at the yield point, strain hardening parameters n and k, and three parameters measuring strain ageing index were determined. The characteristic yield strength, minimum and maximum yield strength ranges obtained were found to comply with the specified tensile properties in the new specification.
Multiple linear regression techniques were used to investigate relationships between the determined mechanical properties and the steels chemical composition as determined by Pacific Steel Ltd. The regression analysis yielded simple linear equations which can be used to predict the mechanical properties of bars from production variations in chemical composition.
These equations reveal that the improved properties of Grade 430 reinforcing steel is mainly attributed to the addition of 0.04% vanadium. Grade 430 steel is found to be less susceptible to strain ageing and can be used in plastic hinge zones in reinforced concrete structures.
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| 892 |
Theories of non-equilibrium statistical mechanicsStirland, S. J. January 1983 (has links)
No description available.
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| 893 |
Statistical models and algorithms for DNA sequencingHaan, Nicholas January 2001 (has links)
No description available.
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| 894 |
The theory of statistical mechanics of dense polymersEvans, K. E. January 1980 (has links)
No description available.
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| 895 |
Foundations of non-equilibrium statistical mechanicsEvans, Allan Kenneth January 1995 (has links)
No description available.
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| 896 |
Statistical mechanics of charged polymers in solutionKing, P. P. January 1982 (has links)
No description available.
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| 897 |
Statistical multiplexing in broadband communication networksBean, Nigel Geoffrey January 1993 (has links)
No description available.
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| 898 |
Investigating statistical homogeneity of a human chromosomeWright, David Jonathan January 1995 (has links)
No description available.
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| 899 |
Statistical analysis of extreme sea levelsDixon, Mark J. January 1995 (has links)
No description available.
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| 900 |
Statistical methods for spatial survival dataShimakura, Silvia Emiko January 2003 (has links)
No description available.
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