INVESTIGADORES
MACHADO Sebastian Pablo
congresos y reuniones científicas
Título:
DYNAMIC STABILITY OF ROTATING THIN-WALLED COMPOSITE BEAMS
Autor/es:
SARAVIA CESAR MARTÍN; MACHADO SEBASTIÁN PABLO; CORTÍNEZ VÍCTOR HUGO
Lugar:
Tandil
Reunión:
Congreso; Congreso sobre Métodos Numéricos y sus Aplicaciones; 2009
Institución organizadora:
Asociación Argentina de Mecánica Computacional
Resumen:
The dynamic stability behavior of thin-walled rotating composite beams is studied by meansof the finite element method. The analysis is based on the Bolotins work on parametric instability for an axial periodic load. The influence of fiber orientation and rotating speeds on the natural frequenciesand the unstable regions is studied. The regions of instability are obtained and expressed in nondimensional terms. The modal crossing phenomenon arising in rotating beams is described. The dynamic stability problem is formulated by means of linearizing a geometrically non-linear TotalLagrangean finite element with seven degrees of freedom per node. This finite element formulation is based on a thin-walled beam theory that takes into account several non-classical effects such asanisotropy, shear flexibility and warping inhibition.
