摘要
碳纤维属于脆性材料,用扫描电子显微镜(SEM)可以直接观察到它的表面和内部缺陷。这些缺陷不仅是控制强度的主要因素,而且也是强度分散性大的原因所在。实验表明,碳纤维的直径愈小,强度愈高:测试长度愈短,强度愈高;密度愈大,强度愈高。反之亦然。本文用国产碳纤维实验证明,用Weibull参数m值可以表征碳纤维的性能。具有高m值的碳纤维,脆性减小,柔性增加。
Carbon fibre is known as a brittle material. Its surface and inner defects can be directly observed by SEM. Presence of these defects is not only the main factor controlling strength, but also the cause of scatter of strength values. Experiment indicates that the thinner the fibre diameter, the higher the strength; the shorter the gauge length or the more the density, the higher the strength too and vice versa. This work, using native carbon fibre, experimently proves that carbon fibre can be characterized by Weibull parameter m. The carbon fibre having high m value must be less brittle and more flexible.
出处
《航空材料学报》
EI
CAS
CSCD
1989年第1期23-30,共8页
Journal of Aeronautical Materials
