原明月
,
周权
,
倪礼忠
玻璃钢/复合材料
本文对改性热固性丁苯树脂(GPSB)复合材料进行了人造海水加速老化试验.研究了GPSB复合材料在人造海水中的吸湿特性和吸湿机理.采用红外光谱分析了材料树脂基体中的化学结构变化.采用电子万能试验机和动态机械分析仪考察了试验前后GPSB复合材料的静态和动态力学性能变化.结果表明,经人造海水老化50天,材料的弯曲强度和层间剪切强度的保留率分别为66.6％和55.3％,储能模量降低.电学性能研究表明,老化试验后,材料的介电性能得到保持.采用扫描电子显微镜观察了人造海水腐蚀前后复合材料界面形貌,发现GPSB复合材料的人造海水腐蚀老化主要发生在树脂和玻璃纤维的界面.
关键词:
热固性丁苯树脂
,
人造海水
,
老化
,
复合材料
GAO Hongbin
,
Harbin Shipbuilding Engineering Institute Harbin
,
China GAO Hongbin
,
Associate Professor
,
Harbin Shipbuilding Engineering Institute
,
Harbin 150001
,
China
金属学报(英文版)
The corrosion fatigue crack growth and near-threshold characteristics of a medium strength steel HT60 were investigated using compact tension specimens exposed to synthetic sea water. The da/dN-△AK_(eff) relation in air can give a conservative estimation of da/dN-△K relations in sea water. In the case of high R, however, crack growth acceleration at high △K regions appears to be cantrolled by the stress-assisted dissolution. The crack opening stress inlensity factor K_(op) detected by the back-face-strain method is the result of crack surface in contact with the corrosion products and therefore an overestimated value of K_(op) at the crack tip is given.
关键词:
corrosion fatigue
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null
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