Graphene is a single atomic layer of graphite which has two dimensional honeycomb structure. Although its structure is very simple, graphene has extraordinary physical properties. Its edge has a characteristic configuration called armchair (AC) or zigzag (ZZ). Graphene nanoribbons (GNRs) of various aspect ratios are equilibrated at low temperatures. The total energies of the multi-layered GNRs decrease with the increase of the number of layers and tensile strain. The amplitudes of out-of-plane deformations of the multi-layered GNRs decrease with the increase of the tensile strain.