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The possible applications of steel solid node newly-patented “JAHANODE” in structural systems

Jahangiri A., Tahir M.

Zeszyty Naukowe. Mechanika / Politechnika Opolska

2011

z. 99

24-25

The members of a building are joined through connections. The type of connection and the manner in which force in the members leads to the production of various structural systems in buildings are from among the main topics in the design and implementation of structures. In recent decades, considering the rapid development of modern technologies in other disciplines, the building industry has experienced a relatively slower growth for various reasons including the strength of materials and executive problems and the determining innovations and inventions. Thus, in the building industry, the demands for larger spans or greater numbers of levels along with the ever- increasing demand for new and varied functions or innovative architectural designs are always restricted by some limitations. Therefore, the construc- tion of modern mega structures or industrial buildings along with the hot issues concerning the economy of the design or the benchmarking or optimi- zation of structural members and new structural systems have always attracted the attention of those interested in the realm.

Environmental improvements by using a water-based synthetic lubricant in Al-strip rolling

Tahir M., Stahlberg U.

International Journal of Applied Mechanics and Engineering

2002

Vol. 7, Spec. is

197-202

The paper is focused on the influence of different types of lubricants in cold flat rolling of an Al-alloy. A water-based synthetic lubricant, least detrimental from environmental point of view, is compared with a conventional mineral-based oil and an oil-in-water emulsion. As a reference no lubricant was utilised. Mean friction coefficients are evaluated from forward slip measurements utilising the Slab method and FEM. For analysing the bearing capacity of the lubricants, the experiments were carried out for different single pass reductions. The lowest values of the friction coefficient were obtained for the emulsion and the highest for the synthetic lubricant. The strip surfaces roughness was investigated before and after rolling. The best bearing capacity, i.e. the smallest increase in friction with reduction, and the lowest surface roughness was found for the synthetic "environmental friendly" lubricant.