应力波传播和衰变基于微尺度建模在聚合物复合物的拓学与圆形粒子的循环粒子
Dominik Sabol1, Zuzana Murčinková1
1Faculty of Manufacturing Technologies with Seat in Prešov, Technical University of Košice, Bayerova 1, 080 01 Prešov, Slovakia.
Polymers
|August 10, 2024
概括
这项研究表明,聚合物复合物拓显著增强应力波阻尼. 即使是少量的增强粒子也会大大增加能量吸收,有效地降低波幅.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 计算力学 计算力学 计算力学
背景情况:
- 复合材料中的应力波传播对于理解它们的动态反应至关重要.
- 粒子强化和拓影响波的衰减.
- 在聚合物复合材料中量化应力波缓解需要详细的微观分析.
研究的目的:
- 分析不同粒子形状和分布的聚合物复合材料中的应力波衰变性能.
- 调查复合拓对应力波缓解机制的影响.
- 量化由于增强颗粒和界面效应而导致的减噪增加.
主要方法:
- 使用显式有限元素分析 (FEA) 的微尺度数值模拟.
- 在2D代表单位单元 (RUC) 中,在冲动单元负载下分析应力波传播.
- 基于米塞斯应力振幅衰减对各种RUC拓学的应力波缓解的评估.
主要成果:
- 复合拓和波粒子相互作用是材料阻尼的重要来源.
- 循环增强颗粒的小百分比 (3.5面积%) 与均质矩阵 (12.5%) 相比,增加了40-43%的应力波阻尼.
- 特定的拓增强了颗粒应力波缓解,可达15.3%.
结论:
- 复合拓在应力波衰减中起着至关重要的作用.
- 强化颗粒,即使在低度,大大提高应力波阻尼性能.
- FEA模拟为聚合物复合材料中的微尺度缓冲机制提供了宝贵的见解.
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