单丝复合材料段裂试验(SFCFT)中,随着外载荷的增加,纤维出现了随机脆断的现象,并在一定的载荷下纤维的段裂数达到"饱和"状态(即纤维段裂数目不再增加),该试验常用于表征纤维与基体间界面性能.针对该试验,本文中充分考虑了组分材料的真实件能(即基体材料的弹塑性性能),利用弹塑性剪滞理论进行纤维与基体间的应力传递分析,初步获得较真实的纤维轴向应力及界面剪应力分布形式;在此基础上,考虑纤维强度分布的非均匀性,利用蒙特卡罗(Monte Carlo)方法对试验巾纤维的随机段裂过程进行了模拟预报,获得载倚与纤维的段裂数的关系.模拟预报与试验结果比较吻合,表明该应力分析及模拟方法的有效性.
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