Example 1) a debonded simply-supported curved beam with the
properties given in Table 1 has been considered. It is assumed that
the debonded region is located at the midspan of the top interface
with a length equals to 13% of the total arc-length. The boundaries
are allowed to have movement in circumferential direction. Table 2
lists the frequencies calculated by the u1w1 and u2w2 patterns and
their differences relative to ANSYS results. Table 2 shows that the
results calculated by the u2w2 pattern compare very well with
those of the ANSYS simulation either for the “with contact” model
or “without contact”. However, the difference between the u1w1
pattern and the ANSYS results is high and reaches 15% in the second
mode.