研究离散元件建模方法和控制单元的拉力断裂行为,切割电缆的线
Lijuan Zhao1,2, Zhongjian Bai3, Hongqiang Zhang4
1School of Mechanical Engineering, Liaoning Technical University, Fuxin, 123000, China.
Scientific reports
|April 6, 2025
概括
这项研究开发了一种离散元件方法 (DEM) 模型,用于剪线电缆控制单元的串线. 更小的和更大的铜线直径提高了这些复杂的扭曲结构的抗拉强度和可塑性.
科学领域:
- 机械工程 机械工程
- 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:
- 控制单元在剪切机电缆中的被困电线具有复杂的扭曲结构.
- 了解它们在拉力负载下的机械反应对于运行安全性和效率至关重要.
- 现有的模型可能无法完全捕捉非线性塑料变形和多体接触特征.
研究的目的:
- 提出和验证一个离散元件方法 (DEM) 模型,用于分析扭曲串串电线的机械行为.
- 调查结构参数,特别是度和铜线直径对应力应变反应的影响.
- 为复杂的线结构的机械性质提供理论见解.
主要方法:
- 控制单元的3D空间离散元件模型的开发.
- 将轴拉力负荷应用于DEM模型以模拟断裂.
- 通过将模拟的应力-张力曲线与实验拉伸性测试数据进行比较来验证模型.
主要成果:
- 该DEM模型准确地预测了线的应力-应变行为和断裂特征.
- 降低斜率 (从54mm降低到39mm) 增加了拉伸强度 (266.16 MPa降低到294.00 MPa) 和断裂延伸 (25.53%降低到26.94%).
- 增加铜线直径 (从0.25mm增加到0.39mm) 显著提高了拉伸强度 (263.46 MPa增加到294.00 MPa) 和断裂延伸 (23.93%增加到26.94%).
结论:
- 较小的距离和更大的铜线直径导致控制单元串串线的拉伸强度和柔性得到改善.
- 曲率对机械响应的影响在49mm以后就会减少.
- 经过验证的DEM模型为分析复杂的扭曲结构和优化材料设计提供了强大的工具.
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