高性能单重和多重纤维聚合物材料的拉伸强度统计:关于正常性的有效性
Yuri M Boiko1, Vyacheslav A Marikhin1, Liubov P Myasnikova1
1Laboratory of Physics of Strength, Ioffe Institute, 26 Politekhnicheskaya Street, St. Petersburg 194021, Russia.
Polymers
|June 10, 2023
概括
对聚合物抗拉强度 (σ) 的统计分析显示,强度较低的材料更适合正常分布模型. 高强度聚合物显示偏差,纤维类型的影响最小.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 统计分析 统计分析
背景情况:
- 之前的研究使用了维布尔和高斯模型来计算机械性质分布.
- 对于高强度聚合物,需要使用各种统计方法进行全面的正常性评估.
研究的目的:
- 综合分析各种高强度定向聚合物的抗拉强度 (σ) 的统计分布.
- 用图形和正式的统计测试来评估σ分布的正常性.
- 为了比较低强度和高强度聚合物材料之间的正常性一致性.
主要方法:
- 研究了七种高强度定向聚合物:超高分子量聚乙烯 (UHMWPE),聚胺6 (PA 6) 和聚烯 (PP).
- 使用图形方法 (正常概率图,量子位-量子位图) 和六个正式的正常性测试 (科尔莫戈罗夫-斯米尔诺夫,沙皮罗-威尔克,利利福斯,安德森-达林,D'Agostino-K平方,陈-沙皮罗).
- 检查了每个聚合物的单纤维和多纤维纤维形式.
主要成果:
- 较低强度的材料 (半柔性PA 6和PP, σ < 1 GPa) 显示出更好的符合正常分布.
- 强度较高的材料 (准脆 UHMWPE, σ > 4 GPa) 显示对正常分布的一致性较低.
- 样品类型 (单纤维或多纤维) 并没有显著影响 σ 分布的正常性.
结论:
- 拉伸强度分布的正常性假设的有效性因材料强度而异.
- 准柔性聚合物比准脆性聚合物更好地与正常分布假设保持一致.
- 统计规范性评估对于精确的高分子材料机械性质表征至关重要.
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