657 research outputs found
A SCALE MODEL FOR EXPERIMENTAL EVALUATION OF BOGIE VIBRATIONS: DESIGN, MANUFACTURE AND MEASUREMENT TECHNIQUES
No full textA SCALE MODEL FOR EXPERIMENTAL EVALUATION OF BOGIE VIBRATIONS: DESIGN, MANUFACTURE AND MEASUREMENT TECHNIQUES
No full textA SI Engine for Ultra Light Aircraft Propulsion
No full textPeculiarity of this new engine : 4-stroke, 4 cylinder horizontally opposed, spark ignition, air-cooled unit with reduction gera; power output greater than 60kW, weight less than 65 kg (ready to fly), high reliability and small overall dimension, due to reduction of components. Experimental tests demonstrate a remarkable weight to power ratio (1,02 kg/kW) comparable with the reference engine Rotax 912 UL-S (0,98 kg/kW)
Hierarchical damage mechanisms in composite materials subjected to fatigue loadings
No full textThe strength degradation of fiber reinforced composites subjected to constant amplitude (CA) fatigue loadings can be described by a two-parameter residual strength model. From the analytical approach it results that under moderate loadings the multiple damage mechanisms develop with different kinetics and manifest their effectiveness at different time scales highlighting the three-Stage hierarchical nature of damage accumulation in composites. The model captures the sequence of damage accumulation mechanisms from diffuse matrix cracking (I), to fiber/matrix interface failure (II) to fiber and ply rupture and delamination (III). Further, by increasing the loading severity it appears that the different mechanisms superpose witnessing their simultaneous co-existence
INIEZIONE CON ATTUATORI PIEZOELETTRICI NEI PICCOLI MOTORI ALTERNATIVI AD A. C.
No full textSan Martino di Castrozza (TN) – Italy. Edited by SGE-Padova. (in Italian)
Un simulatore di trasmissione ferroviaria in similitudine dinamica
No full textRiv. Ingegneria Ferroviaria – Marzo 200
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