Shape memory polymers (SMPs) gained a high amount of attention during the last decades due wide field of use. The main goal is to produce blends with efficient shape recovery. For this it is essential to simulate the shape memory cycle. Main goals of this work is to find a fast development of viscoelastic models, to consider the effect of stress relaxation and to claculate the driving force which causes the recovery of the SMP. The model should be simply able to be adopted to different blends. The calculation of shape memory properties like the recovery rate, the fixation ratio and the complex modulus should show the validity of the developed model. The diffrent experimantal tests shown that the shape memory process could be reproduced. Important features like the stress relaxation, the driving force and the complex modulus could be simulated. Improvement could be done in the resolution ofthe DMTA tests, to find better curves for the Youngs modulusand the viscosity. Another important improvement would bethe repetition of the recovery tests with the right initial lengths. Using this numerical model, it could be possible to produce other original blend using different polymer with a more efficient recovery rate.