摘要
分别对三维四向与三维五向编织C/C复合材料进行了弯曲和压缩试验,观测了两种材料在x向、y向与z向下的位移-载荷曲线,获得了弯曲和压缩的强度和模量数据。结果表明,三维五向C/C复合材料相比于三维四向C/C复合材料,因其本征结构的x向纤维分数增加和z向纤维分数减少使得x方向的弯曲和压缩的强度增加而z方向降低,两种结构的C/C复合材料均表现一种假塑性断裂行为。相比于预制体结构对压缩性能的影响,其对弯曲力学性能的影响更为明显。
By means of the compression and bending experiments, the displacement-load curves and the mechanical properties of the 4D and 5D braided C/C composite along x, y and z directions were studied. The results show that 5D carbon/carbon composites preform have the more fiber fraction in x direction and the less fiber fraction in z direction, compare with the 4D carbon/carbon composites. It can cause the 5D carbon/carbon composites have the higher flexural and compression properties in x direction and the lower properties in z direction, both fabric composites shows obvious pseudo-plastic. The effects preform structure on compression properties was more larger than flexural properties.
出处
《炭素》
2017年第1期5-9,共5页
Carbon
关键词
三维编织
C/C复合材料
预制体结构
力学性能
three-dimensional braid
C/C composites
preform structure
mechanical properties
