Abstract
Vibrations of circular cylindrical shells made of unidirectionally reinforced composite materials are considered. The shells have stepped cross sections and are weakened with cracks emanating from the reentrant corners of steps. The influence of circular cracks with a constant depth on the vibration of the shell is described with the aid of a matrix of local flexibility coupled with the stress intensity factor known in the linear elastic fracture mechanics. Numerical results are presented for shells with one and two steps.
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