▎ 摘　　要

Twin graphene as a new two-dimensional carbon allotrope was introduced recently based on the first principal calculations. Here, mechanical properties of two types of twin graphene sheets are investigated using molecular dynamics simulation. By applying uniaxial stress along both zigzag and armchair direction separately, we found that the Young's modulus of two type of twin graphene are independent of the direction of applied external stress while the breaking stresses are different, i.e. the breaking stress is larger for the applied stress along the armchair direction. It was also found that the Young's modulus of v-twin graphene (similar to 315 GPa) is larger than that of h-twin (370 GPa). Moreover, Young's modulus decreases with increasing the size and temperature of system.