使用Altair离散元件方法对NiTi沙幕的磨损分析
Azubuike Hope Amadi1, Mysara Mohyaldinn1, Abdullah Abduljabbar1
1Petroleum Engineering Department, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Malaysia.
Materials (Basel, Switzerland)
|January 23, 2024
概括
与传统材料相比,尼醇 (NiTi) 形状记忆合金 (SMA) 砂屏的磨损减少,特别是在冲击负载下. 奥卡磨损模型,专注于冲击,准确地预测NiTiTi.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 部落学 (tribology) 是一个学科.
背景情况:
- 砂屏是各种工业应用中的关键组件,经常受到磨砂和冲击磨损的影响.
- 尼醇 (NiTi) 是一种形状记忆合金 (SMA),具有独特的性能,但其在砂应用中的磨损行为需要详细调查.
- 传统材料如SUS630和Cr-Mn白铁通常使用,但在特定的磨损条件下可能无法提供最佳性能.
研究的目的:
- 用离散元件方法 (DEM) 模拟来研究NiTi砂屏的磨损行为.
- 在模拟条件下,将NiTi的磨损性能与传统材料 (SUS630,Cr-Mn白铁) 进行比较.
- 评估不同磨损模型 (Oka和Archard) 在预测砂磨损方面的有效性.
主要方法:
- 使用Altair EDEM v2022.2软件进行离散元件方法 (DEM) 分析.
- 雇员Oka和Archard佩戴模型来模拟尼醇 (NiTi) 砂屏的磨损.
- 考虑的关键机械性质:波桑比率,固体密度,剪切模量和扬模量.
主要成果:
- 奥卡模型预测了显著更高的磨损和变形,更好地与砂屏磨损现象保持一致,因为它专注于冲击.
- 与SUS630和Cr-Mn白铁相比,NiTi在冲击负载条件下表现出较低的磨损损失,正如Oka模型预测的那样.
- 粒子大小分布和累积接触能量被确定为磨损反应的潜在预测因素.
结论:
- 奥卡磨损模型提供了一个更合适的沙屏磨损机制,特别是冲击驱动的磨损的表现.
- 在冲击负载下,尼醇 (NiTi) 与传统的高强度材料相比,具有更高的耐磨性.
- 建议进行进一步的研究,以探索微观结构变化,温度效应,并完善SMA的DEM模拟.
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