A new needled cylindrical preform was designed and fabricated in this paper by means of angle plies of continuous wound carbon fibers with a twill fabric and non-woven tapes needled preform as basements. The effects of needled preform structures on the mechanical properties of C/C composites were compared and investigated. The results show that the orthogonal needled C/C composite with the non-woven tapes has higher interlaminar shear strength(ILSS) , and a higher axial tensile strength of 157. 0 Mpa, being 83. 0% higher than that of the twill fabric reinforced. The non-woven tapes reinforced cylindrical C/C composites with different angles have improved ILSS and axial tensile properties, the maximum ILSS and axial tensile strength reach 11.68 Mpa and 179.0 Mpa respectively, being 22. 6% and 14% , respectively, higher than that of the orthogonal C/C composite.%在斜纹碳布/碳纤维网胎、无纬布正交/碳纤维网胎针刺圆筒预制体的基础上,通过在其结构中增加角度缠绕连续纤维,设计和研制了新型结构针刺预制体,并对比研究了不同针刺预制体结构对圆筒C/C复合材料力学性能的影响.结果表明,无纬布正交铺层针刺C/C复合材料的层剪、轴向拉伸强度都高于斜纹碳布增强针刺C/C材料,其中轴向拉伸强度达到157.0 MPa,提高了83.0％；其层剪、轴向拉伸强度均有所提高,其最大分别可达到11.68和179.0 MPa,分别提高了22.6％和14％.
展开▼
