“…In the literature, there are some mathematical results concerning the variational analysis for this kind of problems; see, for instance, [1,3,4] for static models that consider the effects of mechanical, electrical, and thermal interactions in frictional contacts. The mathematical models that describe quasistatic frictional contact with thermo-piezoelectric effects are already addressed in [5,6,7,11,12], and more recently in [8].…”