摘要
This presentation predicts the elastic properties of three-dimensional(3D)orthogonal woven composite(3DOWC)by finite element analysis based on micro/meso repeated unit cell(RUC)models.First,the properties of fiber yarn are obtained by analysis on a micro-scale RUC model assuming fibers in a hexagonal distribution pattern in the polymer matrix.Then a full thickness meso-scale RUC model including weft yarns,warp yarns,Z-yarns and pure resin zones is established and full stiffness matrix of the 3DOWC including the in-plane and flexural constants are predicted.For thick 3DOWC with large number of weft,warp layers,an alternative analysis method is proposed in which an inner meso-RUC and a surface meso-RUC are established,respectively.Then the properties of 3DOWC are deduced based on laminate theory and properties of the inner and surface layers.The predicted results by the above two alternative methods are in good experimental agreement.
This presentation predicts the elastic properties of three-dimensional(3D) orthogonal woven composite(3DOWC) by finite element analysis based on micro/meso repeated unit cell(RUC) models. First, the properties of fiber yarn are obtained by analysis on a micro-scale RUC model assuming fibers in a hexagonal distribution pattern in the polymer matrix. Then a full thickness meso-scale RUC model including weft yarns, warp yarns, Z-yarns and pure resin zones is established and full stiffness matrix of the 3DOWC including the in-plane and flexural constants are predicted. For thick 3DOWC with large number of weft, warp layers, an alternative analysis method is proposed in which an inner meso-RUC and a surface meso-RUC are established, respectively. Then the properties of 3DOWC are deduced based on laminate theory and properties of the inner and surface layers. The predicted results by the above two alternative methods are in good experimental agreement.
基金
BASTRI Subtopic Research about Digital Sampler Technology of Body Structure Performance Study Based on Big Data Calculation Model,China(No.MIIT Civil aircraft special purpose MJ-2017-F-20)
