评估复合材料安全寿命的低成本方法

提出了一种评估复合材料安全寿命的低成本方法, 该方法可以综合利用以往积累的经验数据和当前的试验数据预测复合材料的安全寿命。由于它既充分利用了当前的试验数据又利用了以往的经验数据, 所以其可利用的信息量要远远大于只能利用当前试验数据的现行方法, 从而用本文方法预测复合材料安全寿命比现行方法既节省了大量试件又提高了精度, 为解决目前复合材料寿命分散性大, 预测安全寿命所需试件个数多、试验周期长、耗资大的问题提供了一种方法。文中还给出了某飞机复合材料在谱载下的安全寿命对比试验结果。 

LOWER COST METHOD FOR COMPOSITE SAFE LIFE

A lower cost method for predicting the composite safe life is given in this paper. It can combine the previous data with the current data to calculate the safe life for composite structures. In the present method, the current test data information is used independently while predicting the safe life. The information available is much more in this paper's method than in the currently available method. As a result, it has not only saved much more specimens, but also improved the predicting precision. Therefore, it solved the problems such as more specimens, longer test period and greater cost because of the large scatter of composite life. Furthermore, some fatigue test data for many kinds of advanced fiber reinforced composite materials are analyzed by this lower cost method. It shows that fewer specimens (only about half of the specimens in the current method) are required in this method and the result is more accurate for the same number of specimens by these contrast examples.