摘要
热源模型的选取对数值模拟增材制造过程中准确预测温度场分布和熔池形貌至关重要。本文选取面热源模型、体热源模型和双椭圆热源模型进行对比分析。3种热源模型被汇编成用户自定义子程序嵌入Abaqus/Standard仿真软件中用于镍基高温合金IN625选区激光熔化过程中最高温度和熔池形貌的预测。仿真与实验结果对比表明,双椭圆模型可以较好地预测熔池几何形貌,而体热源模型在预测最高温度值时准确度更好。相比之下,面热源模型在预测最高温度和熔池形貌时准确度最差。研究结果表明,在开展深入研究之前,热源模型的校准修正是提高效率和模拟准确性的前提。
The selection of heat source model is very important to accurately predict the distribution of temperature field and melting pool geometry in the numerical modeling of additive manufacturing process.The surface model,volumetric model and double-ellipsoid model are selected for comparison and analysis.These three heat source models are progarmmed as user-defined subroutines with Abaqus/Standard simulation software to predict the peak temperature and melting pool geometry during selective laser melting(SLM)of IN625.The comparison between simulation and experimental results shows that double-ellipsoid model can predict the melting pool geometry well,while the volumetric model provides comparative peak temperature predictions.In contrast,the surface model exhibits significant deviations in both melting pool geometry and peak temperature.The findings in this research highlight the need for model calibration or modification to enhance efficiency and accuracy before further research can be conducted.
作者
李斌训
孙玉晶
杜劲
夏岩
苏国胜
张庆
LI Binxun;SUN Yujing;DU Jin;XIA Yan;SU Guosheng;ZHANG Qing(School of Mechanical Engineering,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250353,P.R.China;Shandong Institute of Mechanical Design and Research,Jinan 250031,P.R.China;Engineering Training Center,Shandong University,Jinan 250002,P.R.China)
基金
supported by the Natu⁃ral Science Foundation of Shandong Province(No.ZR2021QE230)
the Talent Research Project of Qilu Uni⁃versity of Technology(Shandong Academy of Sciences)(No.2023RCKY118)
the National Natural Science Foundation of China(Nos.52275438,52205480).
关键词
热源模型
数值仿真
IN625
温度
熔池形貌
heat source model
numerical modeling
IN625
temperature
melting pool geometry
