摘要
应用断裂力学的理论和方法对±30°、±45°、±60°三种取向玻璃纤维增强塑料的应力腐蚀开裂行为进行了研究,并与单向玻璃纤维增强塑料的应力腐蚀开裂行为进行了比较。结果表明,纤维取向对玻璃纤维增强塑料的应力腐蚀行为有很大影响。三种取向玻璃纤维增强塑料的耐应力腐蚀性能强弱顺序为:±30°、±45°、±60°玻璃纤维增强塑料。与单向玻璃纤维增强塑料相比,三种取向玻璃纤维增强塑料有更高的应力腐蚀临界载荷值,低于该载荷,可以认为在可接受的时间范围内不会发生应力腐蚀。进一步的讨论证实纤维/基体界面在取向玻璃纤维增强塑料的应力腐蚀中起着重要作用。随外加载荷的变化,取向玻璃纤维增强塑料与单向玻璃纤维增强塑料的应力腐蚀裂纹扩展机理不同。
Stress corrosion cracking of three kinds of oriented glass fibre reinforced plastics (GRP), including ±30°, ±45°, ±60° oriented GRP, were studied by fracture mechanics theory and compared with the stress corrosion cracking of unidirectional GRP. The results show that the fibre orientation affects on the stress corrosion cracking of GRP seriously. For the oriented GRP in this investigation, from better stress corrosion resistance to worse the order is ±30°, ±45°, ±60° oriented GRP. Compared with unidirectional GRP, oriented GRP demonstrate higher stress corrosion threshold loads, below which GRP can't fail in acceptable exposure time. Further discussions conform that fibre/matrix interface plays an important role in the stress corrosion cracking of oriented GRP and the crack growth mechanisms of oriented GRP and unidirectional GRP are different under different applied loads.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2004年第6期39-46,共8页
Acta Materiae Compositae Sinica
关键词
应力腐蚀开裂
玻璃纤维增强塑料
纤维取向
裂纹扩展
Crack initiation
Dynamic mechanical analysis
Fracture mechanics
Mechanical properties
Scanning electron microscopy
Stress corrosion cracking
