三维全五向编织复合材料的压缩性能

Compressive properties of three-dimensional full five-directional braided composites

以无碱玻璃纤维为原料,采用四步法1×1编织工艺在全自动模块组合式编织平台上制备三维五向及全五向编织物;以E51环氧树脂、70#固化剂(四氢邻苯二甲酸酐)为树脂基体,与编织物复合制备三维五向及全五向编织复合材料;并利用Instron万能材料试验机对比测试上述编织复合材料的压缩性能,研究轴纱、编织角、纤维体积分数等结构参数对材料压缩性能的影响。结果表明,编织复合材料的压缩性能随着编织角的增大而降低,随着轴纱、纤维体积分数的增大而提高;三维全五向编织复合材料的压缩性能明显好于三维五向编织复合材料。

High strength alkali-free glass fibers were used as raw materials,and three-dimensional five-directional and full five-directional braided fabrics were prepared respectively on a full-automatic modular braided machine by using braiding craft of four-step rule 1×1.Three-dimensional five-directional and full five-directional braided composites were prepared by combining the braided fabric with resin matrix,including epoxy resin E51 and curing agent 70#（tetrahydrophthalic anhydride）.Compressive properties of above braided composites were tested by using Instron universal testing machine,and the influence of structure parameters,like axis yarns,braiding angles and fiber volume fraction,on the compressive properties was also studied.The compressive properties increased with the increase of axis yarns and fiber volume fraction,and decreased with the increase of braiding angles.The compressive property of three-dimensional full five-directional composites was obviously better than that of three-dimensional five-directional ones.