In this study, quadratic polynomial distributions across the
core's height are proposed for the core's displacement components.
The authors have tried several other possible distributions to study
the free vibration response. The analyses were performed for both
intact and debonded curved beams for a wide verity of circumstances
such as various curvature angles, boundary conditions,
debond lengths and debond positions and were compared to
ANSYS simulations. The results indicated that the quadratic distribution
agrees very well with the ANSYS simulation comparing to
other distributions. Linear distribution that has been proposed by
Bozhevolnaya and Sun (Qian et al., 2003) is one of the other
examined patterns. In this section, the linear and quadratic patterns
are termed as u1w1 and u2w2, respectively, and their results are
compared for three different cases.
A two dimensional model was created in modal environment of
ANSYS Workbench under plane stress condition. The beam was
meshed with quad element as shown in Fig. 2. The meshing has
been refined around the debonded region to obtain a mesh-size
independent solution. ANSYS Workbench uses element plane 183
by default for linear analyses. The Workbench provides several
connection types to model a debonded region. “No separation” type
has been used for the linear “with contact” model. Also, the
connection has been suppressed for the case of “without contact”
model.