  In this paper, we mainly investigate the problems of resonances of massive KK
fermions on a single scalar constructed thick brane with a piecewise warp
factor matching smoothly. The distance between two boundaries and the other
parameters are determined by one free parameter through three junction
conditions. For the generalized Yukawa coupling $\eta\bar{\Psi}\phi^{k}\Psi$
with odd $k=1,3,5,...$, the mass eigenvalue $m$, width $\Gamma$, lifetime
$\tau$, and maximal probability $P_{max}$ of fermion resonances are obtained.
Our numerical calculations show that the brane without internal structure also
favors the appearance of resonant states for both left- and right-handed
fermions. The scalar-fermion coupling and the thickness of the brane influence
the resonant behaviors of the massive KK fermions.
