Dynamic Analysis of Hybrid Aluminum/Composite Shafts

 

Zorica Đorđević, PhD (Eng)

Stevan Maksimović, PhD (Eng)

Ivana Ilić,  BSc (Eng)

 

The aim of modern mechanisms is to achieve the highest operating speeds as possible, so a precise dynamic analysis of stability of shafts is very important. The analysis of the vibratory characteristics (fundamental natural frequencies, critical speed and critical torque) of a composite shaft from a real construction, subject to orientation of fibres and geometrical measures of shaft, is presented in the paper. Owing to a high value of specific stiffness, the shafts made of composite materials have considerably higher values of fundamental natural frequencies compared to steel shafts. An important advantage of composite materials for manufacturing shafts is that their application enables the increase of shaft length that would lead to the occurrence of bending resonance in  case other materials were used. It is thus suitable to make shafts for automobiles, trucks and other relevant systems out of composite materials in the future.

Key words: shaft, composite materials, aluminium, dynamic analysis, vibrations, vibration stability