  This paper is concerned with system of magnetic effected piezoelectric beams
with interior time-varying delay and time-dependent weights, in which the beam
is clamped at the two side points subject to a single distributed state
feedback controller with a time-varying delay. By combining the semigroup
theory with Kato's variable norm technique, we obtain the existence and
uniqueness of solution. By imposing appropriate assumptions on the time-varying
delay term and time-dependent weights, we introduce suitable perturbed Lyapunov
functional to obtain exponential stability estimates.
