1,721,003 research outputs found
Sull’Impiego del Metallo come Lubrificante Solido nel Processo di Deformazione per Compressione
No full textSulla relazione tra proprietà meccaniche e deformazione in un acciaio inossidabile AISI 304 sottoposto a trattamento temomeccanico
No full textExperimental Evaluation of Properties of Cross-linked Polyethylene
No full textThis article describes several aspects of the production of cross-linked polyethylene. Advantages and disadvantages of chemical, or electron beam irradiation, cross-linking processes are discussed. The material under test is thermoshrinking low density polyethylene, produced at the Megarad s.r.l. (Cassino, Italy) firm. It is mostly used as blanket insulation for low and medium electrical voltage cables and As anticorrosion protection for gas pipes. The performance of end products is verified through destructive tests. In particular, we evaluated the gel fraction, the modulus of elasticity at 150degreesC and the elongation percent on commercial pipes and on specimens manufactured by varying certain parameters, such as the irradiation dose
Predicting Fatigue Lifetime of Glass Fibre-Reinforced Composites from Residual Strength Data
No full text
Fuzzy logic modeling and control of steel rod quenching after hot rolling
No full textReinforced concrete rod produced by European Community countries must comply with standards that establish minimum strength and tensile properties along with other technological and geometrical characteristics; however, possible variability within the assigned limits is not specified. Consequently, a number of manufacturing methods are now used, with the result that over time the mechanical properties of these products vary widely. Increased competition has led to the development of new procedures incorporating both process and quality control. One example is a process based on the heat treatment undergone by the metal bars leaving the final stand of the rolling mill train. In this way, the mechanical and technological properties can be graduated, thereby enhancing strength (particularly yield point) without altering the deformability of the material. This procedure does away with the need to alter the chemical composition of the steel used to manufacture the rods. Process adjustment still relies on the experience of the production manager, however. This paper examines the possibility of applying fuzzy logic computer techniques to the heat treatment process in order to render it more rational and independent of operator unreliability
Dimensional errors in longitudinal turning based on the unified generalized mechanics of cutting approach
No full text- …
