  The natural vibrations of curved nano-beams and nano-arches are studied. The
nano-arches under consideration have piece-wise constant thickness; these are
weakened with stable cracks located at-entrant corners of the steps. A method
of determination of natural frequencies is developed making use of the method
of weightless rotating spring. The aim of the paper is to assess the
sensitivity of the eigenfrequencies on the geometrical and physical parameters
of the nano-arch. The results of the calculations favourably compare with
similar works of other researchers.
