韦布尔参数是从单一碳纤维拉伸试验的综合数据集中确定的
Rajnish Kumar1, Lars P Mikkelsen1, Hans Lilholt1
1Division of Wind Energy Materials and Components, Department of Wind and Energy Systems, Technical University of Denmark, 4000 Roskilde, Denmark.
Data in brief
|February 17, 2025
概括
对PYROFILTM TRW40 50L碳纤维的拉伸性能进行了分析,这些碳纤维在各种尺寸长度上进行了分析. 发现故障应力与标尺长度线性缩放,为复合模拟提供了关键参数.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 复合材料 复合材料 复合材料
背景情况:
- 了解单一碳纤维的拉伸性能对于预测先进复合材料的机械行为至关重要.
- 之前的研究已经强调了纤维特性和测试条件对材料性能的影响,需要详细的表征.
- PYROFILTM TRW40 50L碳纤维是一种常见的钢筋材料,其精确的机械性能需要彻底调查.
研究的目的:
- 为了呈现PYROFILTM TRW40 50L单碳纤维的全面拉伸性能.
- 调查不同尺寸长度对纤维拉伸行为和故障应力分布的影响.
- 通过使用韦布尔缩放来确定碳纤维复合材料行为建模的关键机械参数.
主要方法:
- 拉伸测试大约1200个单一碳纤维在八个不同的尺寸长度 (20-80毫米).
- 使用二次多项式拟合方法分析应力-张力曲线,以确定初始模量和曲率系数.
- 应用韦布尔模型来分析故障应力分布,并推导出特征性,中位数和平均故障应力.
主要成果:
- 相当纤维直径分布以 (7.37 ± 0.34) μm 的平均值确定.
- 发现初始模量为 (220 ± 3) GPa,曲率系数为 (3600 ± 250) GPa.
- 故障应力 (特征性,中位数,平均值) 与标尺长度呈现线性缩放,具有确定长度尺度独立的应力长度因子.
结论:
- 该研究提供了PYROFILTM TRW40 50L碳纤维的基本拉伸性能数据,包括它们的直径分布和机械模块.
- 这些碳纤维中的故障应力与标尺长度线性地变大,这是准确预测复合材料性能的关键发现.
- 确定的纤维特性和韦布尔缩放参数使得碳纤维复合材料机械行为的增强建模成为可能.
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