短玻璃纤维增强尼龙6的无缺口冲击性能

兵器材料科学与工程 , 2008, 31(3): 22-26. doi: 10.3969/j.issn.1004-244X.2008.03.006

短玻璃纤维增强尼龙6的无缺口冲击性能

熊玉竹 ^1, , 王超先 ^2, , 刘滢 ^3, , 于杰 ^4, , 涂铭旌 ^5,

1.四川大学,材料科学与工程学院,四川,成都,610065;四川大学,材料科学与工程学院,四川,成都,610065;贵州大学,材料科学与冶金工程学院,贵州,贵阳,550003

2.北京燕山石化研究院,北京,102500

3.北京燕山石化研究院,北京,102500

4.贵州大学,材料科学与冶金工程学院,贵州,贵阳,550003

5.四川大学,材料科学与工程学院,四川,成都,610065

基金项目: 贵州省自然科学基金((2002)3079)

关键词：短玻璃纤维增强尼龙6 , 冲击断裂曲线 , 断面形态 , 塑性变形

Unnotched izod impact of short glass fibre reinforced PA6

用仪器化冲击实验研究短玻璃纤维增强尼龙6的无缺口冲击性能.实验结果显示,在悬臂梁无缺口冲击实验条件下,纯尼龙6因其良好的塑性变形能力而具有良好的无缺口冲击性能.样条截面沿冲击方向分为拉伸响应区、中性层和压缩响应区.短玻纤增强尼龙6则因分散在尼龙6中的纤维制约了树脂基体的塑性变形能力而导致其无缺口冲击性能降低.实验结果显示纤维和基体的界面破坏及纤维的拔出对冲击断裂能有重要的影响,所以纤维的分布数量对于短玻璃纤维增强尼龙6的无缺口冲击断裂能非常关键.断面观察显示,由于冲击端外层的塑性变形缓和了该区域所受的应力,导致裂纹源不在外层而在内层形成.在外层断面上,由于塑性变形的作用,一些拔出纤维上粘附了许多基体,纤维拔出后的剩余孔洞壁也十分粗糙.

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