激光辅助冷喷涂Cu颗粒撞击45钢的数值模拟

发布时间：2018-01-17 21:23

  本文关键词：激光辅助冷喷涂Cu颗粒撞击45钢的数值模拟　出处：《兵工学报》2015年11期 　论文类型：期刊论文

  更多相关文章： 材料表面与界面 冷喷涂 材料模型 模拟

【摘要】：采用有限元分析软件ANSYS Multiphysics/LS-DYNA模块,选取Johnson-Cook材料模型与双线性各向同性硬化材料模型,建立了激光辅助冷喷涂三维模型,并通过这两种材料模型模拟了不同入射速度和沉积点温度条件下,Cu颗粒撞击45钢基体的沉积过程,分析了速度、沉积点温度对沉积颗粒变形行为的影响。结果表明:常温下颗粒撞击速度为800 m/s和基体预热温度850℃、颗粒速度为500 m/s时,Cu颗粒都能有效沉积到45钢基体上;两种模型都能用于预测激光辅助冷喷涂工艺参数。
[Abstract]:The finite element analysis software ANSYS Multiphysics/LS-DYNA is used. The Johnson-Cook material model and the bilinear isotropic hardening material model are selected to establish the three-dimensional model of laser assisted cold spraying. The deposition process of Cu particles impacting on 45 steel substrate under different incident velocity and deposition point temperature was simulated by these two material models, and the velocity was analyzed. The results show that the particle impact velocity is 800 m / s at room temperature, and the substrate preheating temperature is 850 鈩，

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