采用海水浸泡-阳光曝晒循环老化的方法,模拟实际海洋环境载荷对T300/环氧复合材料的作用,用以评价手糊成型T300/环氧复合材料在海洋环境中的耐久性.通过对老化前后复合材料的质量变化、轴向抗拉强度、拉伸模量、面内剪切强度及压缩强度等基本力学性能的分析,研究T300/环氧复合材料的老化规律.结果表明:经过湖北武汉和海南三亚140天的自然循环老化,增重率随时间的增加而增加,力学性能的衰减趋势基本一致,其中拉伸模量老化特征不明显,抗拉强度变化较小,然而面内剪切强度和轴向压缩强度衰减幅度较大,干态试件剩余强度大于湿态试件剩余强度.%The natural cycle ageing which contained marinating in seawater and insolating was used to simulate and determine the durability of T300/epoxy composite made by the hand lay-up technics under marine environmental load. Natural ageing character of T300/epoxy samples was studied by changes in mass gain and mechanical property including tensile strength, tensile modulus, in-plane shear strength and compression strength. The results show that after 140 days natural cycle ageing in Wuhan and Sanya, the mass gain increases with increasing time and the attenuation trend of mechanical properties is uniform. The ageing character of tensile modulus is inconspicuous. Tensile strength changes small, but in-plane shear strength and compression strength have great attenuation extent. The residual strength of the samples in dryness state is stronger than that in wetness state.
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