Pk. Gotsis et Jd. Guptill, FREE-VIBRATION OF FIBER-COMPOSITE THIN SHELLS IN A HOT ENVIRONMENT, Journal of reinforced plastics and composites, 14(2), 1995, pp. 143-163
Results are presented of parametric studies to assess the effects of v
arious parameters on the free vibration behavior (natural frequencies)
of [+/-theta](2) angle-ply fiber composite thin shells in a hot envir
onment. These results were obtained by using a three-dimensional finit
e element structural analysis computer code. The fiber composite shell
is assumed to be cylindrical and made from T300 graphite fibers embed
ded in an intermediate-modulus high-strength matrix (IMHS). The residu
al stresses induced into the laminated structure during the curing are
taken into account. The following parameters are investigated: the le
ngth and the thickness of the shell, the fiber orientations, the fiber
volume fraction, the temperature profile through the thickness of the
laminate and the different ply thicknesses. Results obtained indicate
that: the fiber orientations and the length of the laminated shell ha
d significant effect on the natural frequencies. The fiber volume frac
tion, the laminate thickness and the temperature profile through the s
hell thickness had a weak effect on the natural frequencies. Finally,
the laminates with different ply thicknesses had insignificant influen
ce on the behavior of the vibrated laminated shell.