摘要
在综合考虑材料热物性参数随温度变化以及相变潜热的情况下,建立选择性激光烧结的三维有限元模型,利用APDL语言实现激光热源的移动,分析分形路径和S形路径两种情况下温度场和熔池的分布情况。模拟结果表明:分形扫描的激光烧结温度场比S形扫描的温度场分布均匀,温度梯度小,结合牢固,烧结质量高。此结论与先前的实验结果相吻合。
A three-dimensional transient thermal finite model of selective laser sintering was established based on the comprehensive considering temperature-dependent thermophysical property parameters and latent heat due to phrase transformation from powder to liquid.The laser thermal resource moving was carried out by using the ANSYS parameter language（APDL）.The distribution regularities of the temperature field and molten pool based on fractal scanning path and S path were analyzed emphasizely.The simulation results show that the fractal scanning path has uniform temperature field,lower temperature gradients,firmer integrability,higher quality than those of S path.The result meets with the former experimental results well.
出处
《机床与液压》
北大核心
2010年第19期32-35,共4页
Machine Tool & Hydraulics
基金
江西省自然科学基金项目(2008GZC0055)
江西省教育厅科技项目(GJJ09209)
华东交通大学基金(07JD05)
载运工具与装备省部共建教育部重点实验室开放基金资助项目
关键词
选择性激光烧结
有限元模拟
温度场
熔池
Selective laser sintering
Finite element simulation
Temperature field
Molten pool
