用GPU加速的无网格计算框架来建模摩擦表面化过程
Ahmed Elbossily1, Zina Kallien1,2, Rupesh Chafle2
1Institute for Production Technology and Systems, Leuphana Universität Lüneburg, Universitätsallee 1, 21335 Lüneburg, Germany.
概括
这项研究引入了一个无网格的光滑粒子水力学 (SPH) 框架,用于摩擦表面 (FS) 建模. 该GPU加速模型准确地预测了合金中的热力学行为和沉积机制.
科学领域:
- 计算力学是计算力学.
- 材料科学 是一种材料科学.
- 制造过程中的制造工艺.
背景情况:
- 摩擦表面 (FS) 是一种固态增材制造工艺.
- 精确的FS建模需要强大的模拟技术来捕捉复杂的热力学现象.
- 现有的模型可能缺乏准确预测材料沉积和行为的可靠性.
研究的目的:
- 开发和验证一个无网格计算框架来建模摩擦表面过程.
- 调查FS期间的热力学行为和沉积机制.
- 为优化FS过程参数和了解材料流提供一个工具.
主要方法:
- 使用无网状光滑粒子水力学 (SPH) 方法进行模拟.
- 实现GPU计算,以提高计算效率.
- 综合优化技术 (粒子切换,子域划分) 和稳定性增强 (人工粘度,应力,核校正).
- 开发了一种基于连接温度和临界剪压的新型材料分离标准.
主要成果:
- 该SPH模型准确地预测了AA5083摩擦表面的轴力,温度概况和沉积体几何.
- 模拟显示了工艺参数对沉积物宽度和厚度的关键依赖.
- 获得了对材料流,沉积分布和棒闪光形成的深入见解,与实验数据保持一致.
- 在棒闪和沉积物中观察到高塑性应变,集中在前进侧面.
结论:
- 经过验证的3D SPH框架是一个强大的工具,用于预测摩擦表面的热力学行为.
- 该模型为沉积机制提供了宝贵的见解,有助于过程理解和优化.
- 这种方法提升了固态增材制造技术的模拟能力.
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