摘要
用仪器化冲击试验研究了玻璃纤维对短切玻纤增强PA6(SGF-PA6)悬臂梁缺口冲击性能的影响。一方面,纤维限制和约束了PA6基体的塑性变形,有降低复合材料冲击韧性的影响。另一方面,冲击断裂过程中的纤维/基体界面破坏和纤维拔出可吸收一部分能量(在断口分析中很少看到纤维的断裂,所以未考虑纤维断裂的影响),这有增加复合材料冲击韧性的影响。这两个因素共同影响SGF-PA6的缺口冲击性能。冲击曲线的最大力值与界面破坏和纤维拔出有关。试验结果显示,随着温度降低,SGF-PA6的缺口冲击性能降低。但在相同的低温条件下,SGF-PA6的缺口冲击韧性优于纯PA6,所以认为界面的破坏和纤维的拔出对SGF-PA6的低温冲击韧性有重要作用。
The notched impact property of short glass fiber reinforced PA6 （SOF- PA6） was studied using an instrumented Izod impact approach. On one hand, the plastic deformation of PA6 is restricted and restrained by glass fiber which can decrease the impact toughness of SOF- PA6; On the other hand, the debonding of fiber/matrix interface and the pullingout of fiber can consume partial energy, so the impact toughness of SOF - PA6 can be improved. （The fiber breaking hasn＇ t been considered for little breaking fiber can be observed）. The notched impact property of SOF- PA6 is affected by the two factors. The maximum force value in impact curve is related to the debonding of interface and the pullingout of fiber. The notched impact toughness of SOF - PA6 （35 % ） decreases with temperature dropping. But in the same low temperature condition, the notched impact toughness of SOF- PA6（35 % ） is one time than that of pure PA6, so the debonding of interface and the pulling- out of fiber is important for the impact property of SOF- PA6 in low temperature.
出处
《贵州工业大学学报（自然科学版）》
CAS
2008年第1期20-24,共5页
Journal of Guizhou University of Technology(Natural Science Edition)
基金
贵州省自然科学基金项目(2002)3079)
关键词
短切玻纤增强尼龙6
仪器化冲击
界面
short glass fiber reinforced PA6 （SOF-PA6）
Izod notched instrumented impact
interface
