Sommario
Si trova che una trave svergolata in materiale composito, con asse baricentrico diritto, soggetto a trazione e torsione, raggiunge una maggiore efficienza strutturale se le fibre di rinforzo sono dispose già inizialmente secondo linee generatrici elicoidali piuttosto che in direzione assiale come supposto in un precedente lavoro di Hodges.
Summary
A pretwisted composite beam with straight centroidal axis, subjected to axial tension and torsion is proved to achieve a better structural efficiency if the reinforcing fibers are located along helicoidal generators in the pretwisted configuration, than in the Hodges' problem where those fibers are parallel to the beam axis.
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References
Hodges D.H.Torsion of pretwisted beams due to axial loading. J. Appl. Mech., 1980, pp. 393–396.
Algostino F.La trave svergolata in materiale composito. (in publication).
Algostino F.Analisi delle grandi deformazioni e relative tensioni. Accademia delle Scienze di Torino (in publication).
Chu C.The effect of initial twist on the torsion rigidity of prismatical bars and tubular members. Proc. First U.S. Nat. Congr. Appl. Mech., 1952, pp. 265–269.
Rosen A.The effect of initial twist on the torsional rigidity of beams. Another point of view. J. Appl. Mech., 1980, pp. 389–392.
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Algostino, F. Finite twist of composite beams. Meccanica 23, 119–120 (1988). https://doi.org/10.1007/BF01556711
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DOI: https://doi.org/10.1007/BF01556711