基于微结构的磁力机械建模磁铁质弹性体复合材料:双极和马克斯韦方法的可比分析
1Department of Civil and Environmental Engineering, University of California, Irvine, CA 92697-2175, USA.
Materials (Basel, Switzerland)
|March 13, 2025
概括
磁性弹性体 (MRE) 通过粒子相互作用表现出可调节的特性. 双极方法有效地模拟直链MRE,为这些广泛使用的结构提供了麦克斯韦方法的替代方案.
科学领域:
- 材料科学 材料科学 材料科学
- 复合材料 复合材料 复合材料
- 智能材料是一种智能材料.
背景情况:
- 磁铁性弹性体 (MRE) 是先进的复合材料,其机械性能可以通过控制嵌入铁磁粒子之间的相互作用来调整.
- 了解MRE的磁力机械合和磁力强制性行为对于其在可调节设备中的应用至关重要.
研究的目的:
- 评估和比较基于微观结构的二极管和麦克斯韦尔方法,用于在MRE中建模磁力机械合和磁强度.
- 为了研究各种铁磁粒子分布对MRE的磁阻力反应的影响.
- 确定不同MRE微结构的最有效和最准确的建模方法.
主要方法:
- 有限元素建模 (FEM) 的代表体积元素 (RVEs) 与铁磁粒子的受控体积分数.
- 应用双极和马克斯韦方法来模拟磁场下的MRE行为.
- 对具有多种微观结构的MRE进行分析,包括直链,垂直/水平对齐,角度和六角粒子分布.
主要成果:
- 直链微观结构显示出最显著的磁强化效应,这是由于剪切刚度较低和磁力较大.
- 双极和麦克斯韦方法为垂直或水平对齐的粒子提供了一致的结果,当分离超过三个粒子半径时.
- 双极和马克斯韦方法之间的差异在复杂的微观结构中增加,特别是六角分布的27%差异.
结论:
- 选择的建模方法对预测MRE性能有重大影响.
- 对于具有直链对齐的异性质MREs,二极管法是麦克斯韦法的一个高效和准确的替代方案.
- 精确模拟MRE微结构对于优化其磁力机械性能和应用至关重要.
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