碳黑-UHMWPE复合材料的拉伸变形和横向应变行为
Peder C Solberg1, Douglas W Van Citters1
1Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA.
电导性超高分子量聚乙烯 (UHMWPE) 复合材料保持体积保存率高达100%. 较高的填充物含量增加了体积,表明材料开放,在高应变时发生.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物复合材料 聚合物复合材料
- 机械工程 机械工程
背景情况:
- 超高分子量聚乙烯 (UHMWPE) 的导电复合材料在弹道学和骨科等苛刻应用中显示出应变传感的前景.
- 了解这些复合材料在大型塑料菌株下的几何行为,对于它们作为传感器的有效利用至关重要.
研究的目的:
- 在大型塑料菌株下量化电导性UHMWPE复合材料的几何变形.
- 将这些变形与整洁的控制材料进行比较,并根据体积保存进行基于体积保存的预测.
- 调查填充剂加载对材料几何学的影响,并确定像结这样的现象.
主要方法:
- 我们使用物理测量量UHMWPE复合材料的几何变形,这些复合材料经历了大量的塑料应变.
- 实验数据与从体积保存原理得出的预测进行了比较.
- 在研究材料中观察并量化了结行为.
主要成果:
- 材料几何密切遵循低至中等塑料菌株的体积保存预测,只有在100%的标称菌株上,偏差超过5%.
- 与整洁的对照组相比,具有较高填充负载的复合材料在测量体积上表现出更大的增加,特别是在更高的应变时.
- 在高填料复合材料中的体积度开放和结现象被确定为影响大菌株几何学的重要因素.
结论:
- 导电性UHMWPE复合材料的几何行为在很大程度上与体积保存直到显著的塑料变形相一致.
- 较高的填充物含量可能会导致体积增加,由于体积开放等因素,影响传感器性能.
- 观察到的结需要在未来对这些材料在极端应变条件下的电性质的表征进行考虑.
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