在冷喷雾过程中对粒子冲击和界面结合的周动力学模拟
1Mining and Materials Engineering, McGill University, Montreal, QC H3A 0G4 Canada.
概括
一个新的周动力学 (PD) 模型模拟了冷喷沉积,准确地捕捉了粒子变形和结合. 这种方法通过包括界面粘附来增强模拟,这对于增材制造和维修技术至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 计算力学 计算力学 计算力学
- 表面工程是什么?表面工程是什么?
背景情况:
- 冷喷涂是涂料,增材制造和维修的关键技术.
- 精确模拟冷喷沉积具有挑战性,特别是在接口粘附方面.
- 现有的数值方法往往忽视了粒子-基板相互作用的关键作用.
研究的目的:
- 开发一种新的数值方法来模拟冷喷沉积.
- 将接口粘附纳入统一的计算框架中.
- 通过模拟粒子变形,结合和反弹来提高冷喷模拟的现实性.
主要方法:
- 开发了一种基于周动力学 (PD) 的数值方法.
- 接口相互作用被整合到构成模型中.
- 提出了两种粘合接触模型:列纳德-约翰类型电位和断裂性质衍生的力-拉伸关系.
- 模拟与使用铜的有限元素方法 (FEM) 结果进行了验证.
主要成果:
- 基于PD的方法准确地模拟了铜颗粒变形,与FEM基准保持一致.
- 该模型成功捕获了粒子-基板结合和分离现象.
- 调节粘附能量证明了该方法在模拟各种沉积场景中的灵活性.
- 开发的框架提供了对变形和粘合的统一处理.
结论:
- 周热动力学为现实的冷喷模拟提供了一个强大的框架.
- 结合界面粘附对于准确的沉积建模至关重要.
- 这种新方法提升了使用冷喷雾的增材制造和维修应用的模拟能力.
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