Analysis of Composite Transverse Mechanical Properties Based on Micromechanical Finite Element Method

Analysis of Composite Transverse Mechanical Properties Based on Micromechanical Finite Element Method

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Transverse fracture often occurs early in the loading history and is one of the key issues limiting the composite structural design.However, the mechanical behavior under transverse loading can not be represented by traditional micromechanical model which does not consider the influence of constituent properties, fiber volume fraction and fiber distribution.A new computational micromechanics finite element method, which the microstructure was verona wig idealized as a random dispersion of parallel fibers embedded in the polymeric matrix using improved random sequence absorption algorithm, was presented.The plasticity of matrix and interface decohesion of the composite were included in this model and the residual stress caused by the cooling of composite after the curing process was also taken into consideration.The transverse tension, compression and shear of composite were analyzed by full body batman silhouette the micromechanical finite element method.

Compared with the experiment results, the prediction errors of transverse module were less than 7%, and the transverse compression strength and shear strength were less than 8%.The results demonstrate that the method proposed here can be used to predict the composite transverse behavior.