设计长期使用的纤维复合材料结构件时,估算其寿命是很重要的。为研究这一课题,在1969年,开始对 S 玻璃、芳香族(1971)纤维和一些石墨纤维制成的简单的环氧复合材料进行了实验研究工作。其办法是将这些经过预浸的纤维束在拉伸状态下进行寿命试验(也称应力破坏或静态疲劳试验)。选取纤维束做试样是因为它们真正代表着复合材料的基本结构坯料。当获得这些数据后,就用不同的方法对它们进行分析,并已在过去10年间陆续予以发表。1980年1月,加利福尼亚州北部的一次大地震破坏了大部份试验试样。因而实际上终 When designing long-term fiber composite structures, it is important to estimate their lifetime. In order to study this topic, experimental studies on simple epoxy composites made from S-glass, aromatic (1971) fibers and some graphite fibers began in 1969. The method is to carry out the life test (also called stress failure or static fatigue test) under these pre-impregnated fiber bundles. The fiber bundles were selected because they really represent the basic structural blank of the composite. When these data are available, they are analyzed in different ways and have been published over the past 10 years. In January 1980, a large earthquake in the northern part of California destroyed most of the test specimens. So in fact the end