Abstarct: The use of composite materials in the design of main structures is increasing in various industries. In polymeric composite materials, due to the viscoelastic behavior of the matrix phase, this phase undergoes the phenomenon of creep and stress release even at low temperatures. For this reason, considering the creep phenomena in the design of composite structures is vital. In this research, first, different types of scales used for the analysis of composites are introduced. Then, different creep models are presented. Then the micromechanical model is used to investigate the creep phenomenon. Modeling has been done for three models of single fiber and single fiber model with intermediate phase and fiber distribution model. In order to predict the properties of the composite in different volume fractions, modeling has been done with different volume fractions. All three models were tested under a periodic boundary conditions for 7200 seconds at a load of 1 MPa and their accuracy was verified by experimental results. Finally, the strain coefficient in different volume fractions was investigated. In the single-fiber mode, the strain decreases with increasing fiber volume fractions and because in the first direction the properties of the material are more dependent on the properties of the fibers, in this direction the changes in properties with temperature are negligible. In the single-fiber mode with intermediate phase, the failure parameter d is used to model the damage in the intermediate phase. The results show that with increasing the failure parameter, the effective modulus of the composite decreases and the effect of this parameter on the reduction behavior of the transverse and shear modulus is greater than the longitudinal modulus of the composite. In the case of random distribution of fibers, the obtained results show a good agreement between this case and the single-fiber mode.