Modeling and analysis of SMC/UD hybrid composites considering microscopic random distribution
In this paper,mechanical properties of hybrid composites composed of sheet molding compound(SMC)/unidirectional fiber(UD)were studied.Monte Carlo method was used to randomly generate fiber sheets at the mesoscopic level,and a modeling method to inhibit interference effect was proposed,which could effectively im-prove the overlap rate between fiber sheets.Periodic boundary conditions are applied to the mesoscopic representa-tive elements to obtain the elastic parameters of the hybrid composites.The predicted elastic modulus of the model is in good agreement with the experimental results.Furthermore,the effects of fiber sheet size,volume fraction and layering mode on the elastic modulus of the hybrid composite were discussed.The results show that the dimension of the representative body changes with the increase of the aspect ratio,and the elastic modulus of the hybrid compos-ite increases.The elastic modulus of the composite increases with the increase of the volume fraction of the fiber sheet.The layup design of hybrid composites can make them not only have the formability of SMC composites,but also have the same elastic modulus as quasi-isotropic materials.
finite element analysisperiodic boundary conditionshybrid compositesRVESMC
万方数据
维普
