We study the asymptotic behaviour of thermoelastic plates with voids where the thermal effects include micro-temperatures. Under suitable conditions on the constitutive constants, we prove well-posedness of the problem by means of semigroup theory. Also we prove that the solutions decay in an exponential way by means of Prüss characterisations of exponential stable semigroups. Later the regularity of the solutions is studied and we see that the semigroup is not differentiable. The case when certain coupling terms vanish is also considered and polynomial decay estimates are obtained.
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