对比研究和引入一个新的热源模型,用于对选择性激光融技术的宏观数值模拟
Hao Zhang1, Shuai Wang2, Junjie Wang3,4
1School of Physics and Electronic Information, Yan'an University, Yan'an 716000, China.
Materials (Basel, Switzerland)
|February 13, 2026
概括
一个新的动态热源模型准确地预测了选择性激光化 (SLM) 中的池尺寸,改进了减少缺陷的模拟. 这种先进的模型提高了增材制造工艺的可靠性.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 计算建模 计算建模
背景情况:
- 选择性激光化 (SLM) 是复杂金属零件的关键增材制造 (AM) 技术.
- 精确模拟融化池动态对于优化SLM过程参数和最大限度地减少诸如毛孔性之类的缺陷至关重要.
- 在SLM模拟中的传统热源模型在预测融化池宽度和深度方面存在局限性.
研究的目的:
- 开发和验证SLM模拟的新型动态热源模型.
- 调查不同热源模型对池几何和温度场的影响.
- 提高数值模拟的准确性,以预测SLM中的池形态.
主要方法:
- 使用 ANSYS APDL 构建一个 3D 过渡热传导有限元模型.
- 四个热源模型的模拟和比较:高斯表面,旋转高斯体积,双圆体和组合模型.
- 建议和分析一个动态热源模型,将表面和体积热源与可调节的能量吸收比率相结合.
主要成果:
- 拟议的动态热源模型实现了池宽度为128.6微米和深度为63.13微米.
- 这种模型的结果是,与其他模型相比,池显著更宽,深度大约17%.
- 实验验证显示宽度为1.0%,深度为5.5%的低相对误差,证实了高预测准确度.
结论:
- 动态热源模型准确预测SLM中的池尺寸,优于传统模型.
- 这个模型有效地捕捉了实际的池形态,提高了用于过程优化的模拟可靠性.
- 这些发现有助于抑制多孔性缺陷,提高SLM加工零件的整体质量.
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