Spinning thin-walled beams made of functionally graded materials: modeling, vibration and instability

The thermoelastic modeling, vibration and instability of spinning thin-walled beams made of functionally graded ceramic-metal based materials are addressed. In this context, the case of pretwisted beams of non-uniform cross-section along their longitudinal axis and subjected to a temperature field of a prescribed gradient through the blade wall thickness, is considered. A continuously graded variation in composition of the ceramic and metal phases across the beam wall thickness in terms of a simple power law distribution is implemented. Results highlighting the effects of the volume fraction, temperature gradient, cross-section aspect ratio, pretwist, compressive axial load on vibration and instability of spinning beams are presented and pertinent conclusions are outlined.