Free vibration of nanobeams including the effect of temperature change is investigated based on the exact nonlocal stress theory. By applying the variational principle, the higher order governing equation with the corresponding higher order boundary conditions is derived. The generalized differential quadrature method (GDQM) is applied to determine the fundamental frequency of nanobeam. The influences of temperature change, nonlocal parameter and slen- derness ratio on the frequency of pinned-pinned and clamped-clamped nanobeams are ex- plored and discussed in detail. Results show that with increasing the temperature change, the frequency increases at low or room temperature, while decreases at high temperature. It is observed that the frequency increases as the nonlocal parameter increases. In addition, the nonlocal effect is dependent on the temperature change. Furthermore, the thermal effect on the frequency is significant for the nanobeam with large slenderness ratio.

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