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基于虚拟射线造算法的聚氨固化压床的中镜异质建模方法
Yang Xu1,2, Zhaochuan Sheng3, Jingyu Zhang1,2
1Railway Engineering Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing 100081, China.
Materials (Basel, Switzerland)
|February 13, 2026
概括
本研究提出了一种用于聚氨固化压床 (PSBB) 的新型中等尺度建模方法,避免了X射线计算机断层扫描 (XCT). 这种方法优化了卧槽宽度,以改善压载床系统中的机械反应.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 计算力学 计算力学 计算力学
背景情况:
- 复合材料的中尺度建模,如聚氨固化压床 (PSBBs),传统上依赖于X射线计算机断层扫描 (XCT).
- 现有的方法在样本大小,成本和复杂的后处理方面存在局限性.
研究的目的:
- 为PSBB开发一种新型的中尺度建模方法,绕过XCT的需求.
- 建立一个计算效率高,准确的方法来分析粒子结合剂复合材料的机械行为.
主要方法:
- 将离散元件方法 (DEM) 与有限元件方法 (FEM) 结合起来.
- 从3D激光扫描中重建高保真离散元素几何.
- 使用虚拟射线造算法进行异质材料中等尺度重建.
- 用实验室的单轴压缩试验验证模型准确性和网格趋同.
主要成果:
- 确定了0.4倍于最小颗粒大小 (0.4 Dmin) 的最佳网格大小,以实现模型准确性.
- 确定至少0.73倍于压载床宽度 (0.73 Wb) 的卧铺宽度可以实现最佳的应力扩散和位移控制.
- 证明了该方法在分析压载床机械反应方面的有效性.
结论:
- 开发的DEM-FEM合方法为XCT提供了一个高效的替代方案,用于PSBBs的中尺度建模.
- 这些发现提供了关于优化卧床尺寸以提高压载床性能的指导.
- 该方法广泛适用于其他多相颗粒粘合剂复合系统.
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