基于离散元素方法的塑料片建模的创新方法
Zhengyang Zhu1, Binghui Li1, Zige Xu1
1College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, China.
Scientific reports
|July 4, 2025
概括
这项研究开发了塑料片的离散元素模型,准确模拟它们的机械性能,以改进回收设备设计. 创新的三角元素模型增强了对薄,高度延长的材料的模拟.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 农业工程 农业工程
背景情况:
- 精确模拟塑料皮膜机制对于开发有效的收集和回收设备至关重要.
- 建模中的挑战包括材料的薄度和高延伸度,使传统的数值方法复杂化.
研究的目的:
- 提出一个创新的离散元素模型 (DEM) 用于使用三角形元素的塑料片.
- 构建一个复合模型,使用基层和结合层来捕捉不同拉力阶段的机械性能.
- 用单轴拉伸和穿孔试验的实验数据校准和验证DEM模型.
主要方法:
- 开发了一个基于塑料片的三角形元素的离散元素模型.
- 构建了一个复合模型,包括一个基础和绑定层.
- 使用单轴拉伸试验 (拉伸强度,延伸) 校准离散元件参数.
- 通过拉伸和穿孔测试来评估模型的准确性.
主要成果:
- DEM模型显示出高精度,在拉伸强度 (2.36%),延伸比率 (0.19%) 和屈服强度 (4.59%) 中存在错误.
- 带有绑定层的复合模型在各种拉力阶段提高了性能.
- 双面穿孔测试显示出较低的错误率 (8.37%和7.48%),验证了双层模型的准确性.
- 拟议的DEM方法是可行的,并且在模拟柔性薄膜材料方面具有计算效率.
结论:
- 离散元件方法 (DEM) 提供了一个可行且准确的方法来建模塑料膜机制.
- 开发的复合DEM模型有效地捕捉了材料在拉伸和穿孔事件中的行为.
- 这项研究为回收应用中的薄,柔性薄膜状材料的数值模拟提供了有价值的新视角.
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