三维正交机织复合材料力学模型研究进展

文章针对细观结构和理论模型进行了综述和回顾,重点介绍了三维正交机织复合材料的分析模型,以期待为今后的研究工作提供借鉴。     

玻璃纤维/丙纶混杂3D机织物及其复合材料的研制

将玻璃纤维与丙纶采用纤维包缠混杂的方法制成所需的纱线,进而研制成3D机织物,并采用直接热压成型工艺制得复合材料板材。对研制成的玻璃纤维增强丙纶基复合材料板材的拉伸性能进行了测试和分析。     

Novel derivatives of 3D woven T-shaped composites with improved performance

Conventional 3D woven T-shaped preforms were modified for improving joint/ peel off strength of associated T-shaped polymeric composites. Preforms were modified at weaving level by preferred yarns orientations for better performance in associated composites. Major modifications studied are; the addition of supporting layer, single or double-crossing in joint layers and crossing along with supporting layer (in a single sample). Novel derivatives were compared with conventionally used (on-loom and off-loom) T-shaped 3D woven composites. Microscopic analysis was also carried out to analyze the orientation of yarns and analysis of samples from failure point after testing. By combined variation of crossing and supporting layers improvement of 47.37% in peel off strength and 70.37% in impact strength was observed. Modified T shapes can serve to be a good replacement for conventional T-shaped stiffener (used to avoid folding under loads) and in joints.