用Weibull 方法评价化学介质对PBO 纤维统计强度的影响

详细信息

EVALUATION OF THE EFFECT OF CHEMICAL MEDIUMON PBO FIBER STRENGTHWITHWEIBULL METHOD

The Department of Applied Chemistry, Northwestern Polytechnical University, Xi’an 710072, China

摘要

摘要: 以Weibull 统计模型和最弱连接理论为基础, 研究了经6 种化学介质处理的5 cm 长PBO 单纤维的统计强度及强度分布, 并与未经处理的PBO 纤维比较。用SEM 对纤维表面进行了观察, 分析了其强度变化的原因。结果表明, 酸性介质对PBO 纤维强度及强度分散性影响较大, 且盐酸和硫酸对纤维的破坏有不同的机理。
- PBO 纤维 /
- Weibull /
- 统计强度
Abstract: The statistical st rength and dist ribution of 5 cm PBO single fiber t reated with six different chemicalmediums were researched based on Weibull/ weakest-link model. The results were compared with the unt reated PBOfiber, and the surface of the fiber was analyzed by SEM. The results show that acidic mediums have more effects onthe strength and dist ribution of PBO fiber, and the break mechanisms are different between t reatment s by HCl andby H₂SO₄ .
- PBO fiber /
- Weibull /
- statistical st rength