Abstract In this paper, we present a 3D Smoothed Particle Hydrodynamics (SPH) model with powder resolved to simulate complex Laser Assisted Additive Manufacturing (LAAM) processes. To the best knowledge of the authors, this is the most comprehensive and complete SPH model for LAAM simulations to date. Major and important underlying physical processes are considered in the model. These include the transient powder–laser interaction, heat transfer, formation and dynamics of the melt-pool, powder-melt-pool interaction, and the phase change. The model is validated for many individual processes. These validation results show that the model is stable, accurate and promising for simulations of complete LAAM processes. The SPH model is demonstrated for simulations of two common LAAM processes: Selective Laser Melting (SLM) and Direct Metal Deposition (DMD).

中文翻译：

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通过平滑粒子流体动力学模拟激光辅助增材制造

摘要 在本文中，我们提出了一个 3D 平滑粒子流体动力学 (SPH) 模型，该模型具有粉末分辨率，用于模拟复杂的激光辅助增材制造 (LAAM) 工艺。据作者所知，这是迄今为止用于 LAAM 模拟的最全面和最完整的 SPH 模型。模型中考虑了主要和重要的基础物理过程。这些包括瞬态粉末-激光相互作用、热传递、熔池的形成和动力学、粉末-熔池相互作用和相变。该模型已针对许多单独的过程进行了验证。这些验证结果表明该模型是稳定、准确的，并且有希望用于完整 LAAM 过程的模拟。SPH 模型用于模拟两种常见的 LAAM 过程：