Prediction method for mechanical properties of composites materialsbased on mesoscopic model
Based on the mesomechanics properties,in this paper,the mecroscopic Representative volume element(RVE)model has been established and studied.By designing the single cell size and arrangement of the RVE model,and applying periodic conditions,and a prediction method of mechanical properties of composites has been presented based on the micro-model.Firstly,for the glass fi-ber/epoxy resin unidirectional composites,the transverse and longitudinal elasticity modulus and Poisson's ratio has been predicted,and the influence of uniform fiber arrangement on the mechanical properties of fiber resin matrix composites was investigated.And the accu-racy of prediction method has been verified by the prediction results of this paper are compared with the experimental values in the litera-ture.Then,for the carbon fiber/epoxy resin unidirectional composites,by changing the effective diameter of the fiber,and then predic-ting the difference in mechanical properties of composites of the quadrilateral RVE model and the hexagon RVE model under the influ-ence of different fiber volume contents has been observed.The results show the more accurate prediction result of the effective modulus of the quadrilateral RVE model under the effect of lateral stretching loads,and presenting a new thought for the prediction and applica-tion of this model.The results show the more accurate prediction result of the effective modulus of the quadrilateral RVE model under the effect of lateral stretching loads,and presenting a new thought for the prediction and application of this model.
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