Glass/Vinylester composite laminates are comprehensively characterised to assess its impact response behaviour under moisture exposure in marine structures. An instrumented drop weight impact machine is utilised to determine the impact responses of dry and immersed specimens in normal, salted and sea water. The specimens, which had three different thicknesses, were subjected to water exposure for a very long period of over 20 months before tested in a low-velocity impact experiment. Water uptake was measured primarily to study the degradation profiles of GRP laminates after being permeated by water. Matrix dissolution and interfacial damage observed on the laminates after prolonged moisture exposure while the absorption behaviour was found typically non-Fickian. The weight of the composite plates firstly increased because of water diffusion up to month 15 and then decreased due to matrix degradation. The specimens with 3, 6 and 9 mm thickness exhibited maximum water absorption corresponding to 2.6%, 0.7% and 0.5% weight gain, respectively. In general, the results indicated that water uptake and impact properties were affected by thickness and less by water type. Impact properties of prolonged immersed specimens reduced remarkably, and intense failure modes detected almost in all cases. The least sensitive to impact damage were wet specimens with 9 mm thickness as they indicated similar maximum load and absorbed energy for different impact energies.

对玻璃/乙烯基酯复合层压板进行了全面表征，以评估其在潮湿环境下在海洋结构中的冲击响应行为。利用一台仪器化的落锤式冲击机来确定干的和浸入的样品在正常，盐溶液和海水中的冲击响应。在低速冲击实验中进行测试之前，将具有三种不同厚度的样品暴露于水中达20个月以上。测量吸水率主要是为了研究GRP层压板在被水渗透后的降解情况。长时间暴露在湿气中后，在层压板上观察到基体溶解和界面破坏，而吸收行为通常是非菲克式的。复合板的重量首先由于直到15个月的水扩散而增加，然后由于基质降解而减小。厚度分别为3、6和9毫米的样品表现出最大吸水率，分别相当于重量增加了2.6％，0.7％和0.5％。通常，结果表明吸水率和冲击性能受厚度的影响，而受水类型的影响较小。长时间浸没试样的冲击性能显着降低，几乎在所有情况下都可以检测到强烈的破坏模式。对冲击损伤最不敏感的是厚度为9 mm的湿样品，因为它们表明相似的最大载荷和不同冲击能量下的吸收能量。体重分别增加7％和0.5％。通常，结果表明吸水率和冲击性能受厚度的影响，而受水类型的影响较小。长时间浸没试样的冲击性能显着降低，几乎在所有情况下都可以检测到强烈的破坏模式。对冲击损伤最不敏感的是厚度为9 mm的湿样品，因为它们表明相似的最大载荷和不同冲击能量下的吸收能量。体重分别增加7％和0.5％。通常，结果表明吸水率和冲击性能受厚度的影响，而受水类型的影响较小。长时间浸没试样的冲击性能显着降低，几乎在所有情况下都可以检测到强烈的破坏模式。对冲击损伤最不敏感的是厚度为9 mm的湿样品，因为它们表明相似的最大载荷和不同冲击能量下的吸收能量。