Vibration and buckling of rectangular composite plates with variable fiber spacing
1990; Elsevier BV; Volume: 14; Issue: 4 Linguagem: Inglês
10.1016/0263-8223(90)90014-6
ISSN1879-1085
AutoresA.W. Leissa, Alberto F. Martı́n,
Tópico(s)Mechanical Behavior of Composites
ResumoThis is a summary of the first known work which analyzes the structural behavior of composite plates having nonuniformly spaced fibers. The present investigation is limited to single layer composites having parallel fibers. This results in a plate which is macroscopically orthotropic, but nonhomogeneous. The free vibrations and buckling of such plates subjected to inplane boundary loadings are studied. A plane elasticity problem must first be solved to determine the inplane stresses caused by the applied boundary loading, and these stresses become input to the vibration and buckling problem. Both problems are dealt with by the Ritz method. Numerical results are obtained for six nonuniform distributions of E-glass, graphite and boron fibers in epoxy matrices in simply supported, square plates. The redistributions are seen to increase the buckling load by as much as 38%, and the fundamental frequency by as much as 21%.
Referência(s)