近年来,我们对玻璃钢在应力下的老化行为作了一些试验研究.采用的材料是:0.21毫米厚无碱玻璃布(经化学处理)增强306~#不饱和聚酯基玻璃钢.试验时将试样浸泡于3%的盐水中,温度恒定于25℃±1℃,对试样施加的轴向拉伸应力分别为极限拉伸强度的25%,32.5%,40%.同时另设一组不受应力作用的试样作对比.老化试验的期限分别为一、二、四和六个月. In recent years, we made some experimental studies on the aging behavior of FRP under stress. The materials used are: 0.21 mm thick alkali-free glass cloth (chemically treated) reinforced 306 ~ # unsaturated polyester based FRP. Sample immersed in 3% saline at a constant temperature of 25 ℃ ± 1 ℃, the tensile stress applied to the sample axial tensile strength were 25%, 32.5%, 40% of the ultimate tensile strength respectively. Comparisons of specimens subjected to stress Aging periods of one, two, four and six months respectively.