Study on Ternary-Cell Model for 2.5 Dimensional Woven Composites
For the purpose of taking the impact of manufacturing procedure on the cross-section of fiber bundles along thickness direction into account,a Ternary-Cell microscopic model(TCM)for 2.5 dimensional(2.5-D)woven composites was proposed by in-troducing a new type of RVE(transition cell)into traditional cell partition method.Compared with conventional models,the terna-ry cell model is capable of capturing the differences of geometrical parameters of surficial,sub-surficial,and internal fiber yarns.Moreover,mechanical parameters including Moduli of several types of typical 2.5-D woven composites were predicted based on TCM as well as stiffness matrix average method.The results showed that the predictions agreed well with experimental data;in ad-dition,a characteristic"saddle-shape"curve was observed for longitudinal tensile modulus along thickness direction;and for 10-6w,the comparative error of longitudinal tensile stiffness between surface cell,transition cell,and inner cell was around 6％,which indicated the deficiency of traditional cell partition method.
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维普
