使用FEM-DEM桥接合器进行裂纹传播的双尺度并发模拟
Manon Voisin-Leprince1, Joaquin Garcia-Suarez1, Guillaume Anciaux1
1Institute of Civil Engineering, Institute of Materials Science and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
Computational particle mechanics
|October 3, 2024
概括
这项研究验证了一种结合的有限元素方法 (FEM) 和离散元素方法 (DEM) 方法来模拟材料故障. FEM-DEM合精确地模拟了颗粒材料的裂传播和磨损,从而降低了大型领域的计算成本.
科学领域:
- 计算力学是计算力学.
- 材料科学是一种材料科学.
- 数字建模 数字建模
背景情况:
- 离散元件方法 (DEM) 对于颗粒物材料模拟是有效的,但对于大型领域而言,计算成本昂贵.
- 有限元法 (FEM) 对于小变形是有效的,但不太适合复杂的颗粒行为.
- 合DEM和FEM提供了一个潜在的解决方案,以平衡精度和计算效率.
研究的目的:
- 为了评估强大的FEM-DEM合配方用于模拟材料故障事件的准确性.
- 评估DEM域大小对合方法准确性的影响.
- 为了验证FEM-DEM合与纯的DEM模拟对裂传播和磨损的验证.
主要方法:
- 实施了一种强合配方,将DEM粒子与FEM节点互插连接在重叠区域.
- 对I模式裂传播和导致碎片的粗表面剪切进行了模拟.
- 通过改变 DEM 域的大小并将结果与纯 DEM 模拟进行比较来评估合方法的准确性.
主要成果:
- 该FEM-DEM合器准确地捕获材料故障,包括裂传播和碎片的产生.
- 结合方法的准确性保持不论DEM域大小相对于故障区域.
- 与纯粹的DEM相比,大规模模拟的计算效率得到了显著提高.
结论:
- 强大的FEM-DEM合是模拟颗粒材料材料故障的有效和准确方法.
- 这种混合方法为大规模的工程问题提供了一个计算效率高的替代品,而不是纯粹的DEM.
- 经过验证的合方法可可靠地应用于涉及骨折和磨损的复杂场景.
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