文献指出:“玻璃钢在浸泡条件下,开始阶段力学性能下降较多、较快。以后则趋向平坦缓和,达到湿态极限强度。”而且对于不同类型树脂的玻璃钢,都有上述的规律。由此可见,玻璃钢在常温水浸泡的老化条件下,起支配作用的是物理变化。为此,我们提出一个基本假设,并由此推导出一个力学公式,将这个公式用来处理我们的试验数据,竟然获得成功。我们还发现:对于所处理的五种不同的力学量(拉伸强度、压缩强度、弯曲强度、拉伸模量和压缩模量),它们有同一的衰减常数。为进一步探索支配这些力学量变化的更深刻的 The literature states: “In the soaking condition, the mechanical properties of FRP decrease more and more quickly, and then tend to be flat and mild, reaching the wet ultimate strength.” And for the different types of resin FRP, have the above rules. Thus, FRP immersed in water at room temperature aging conditions, play a dominant role in the physical changes. To this end, we propose a basic assumption and derive therefrom a mechanistic formula that succeeded in applying this formula to our experimental data. We also found that they have the same attenuation constant for the five different mechanics (tensile strength, compressive strength, flexural strength, tensile modulus, and compressive modulus) handled. To further explore the more profound changes that dominate these mechanics