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一、前 言 六十年代以来,我国在玻璃钢水老化研究方面做了大量的工作,特别是对手糊成型的环氧类和不饱和聚酯类玻璃钢,积累了很多数据,得到以下几个主要结果: 1.玻璃钢在水浸泡条件下,开始阶段力学性能下降较多、较快,以后则趋向缓和,达到温态极限强度。 2.不同的玻璃钢构件(或试样),在常温水浸泡条件下达到湿态极限强度所需要的时间往往是不同的。
I. Preface Since the 1960s, a great deal of work has been done on the research of FRP water aging in our country. In particular, a great deal of data have been accumulated on epoxy and unsaturated polyester FRP pastes. The main results are as follows: 1. FRP immersed in water conditions, the initial stage of mechanical properties decreased more quickly, then tends to ease, to achieve the ultimate strength of the temperature state. 2. The different FRP components (or samples), wet conditions at room temperature to reach the wet ultimate strength required time is often different.