激光烧结核桃壳/Co-PES粉末的温度场有限元模拟  

Finite Element Simulation of Temperature Field of Laser Sintered Walnut Shell/Co-PES Powder

作　　者：宁礼佳[1] 于跃强[1] 郭艳玲[1,2] 李健[1,2] NING Li-jia;YU Yue-qiang;GUO Yan-ling;LI Jian(College of Mechanical and Electrical Engineering,Northeast Forestry University,Harbin 150040,China;Research and Development Center of 3D Printing Materials and Technology,Northeast Forestry University,Harbin 150040,China)

机构地区：[1]东北林业大学机电工程学院,黑龙江哈尔滨150040 [2]东北林业大学3D打印材料与技术研发中心,黑龙江哈尔滨150040

出　　处：《塑料工业》2019年第7期49-53,共5页China Plastics Industry

基　　金：中央高校基本科研业务费专项资金项目(2572017BB11);国家重点研发计划项目(2017YFD0601004);国家自然基金(51475089);黑龙江省自然科学基金项目(ZD2017009);中央高校基本科研业务费专项资金项目(2572017PZ06);中央引导地方科技发展专项(ZY16C03)

摘　　要：利用ABAQUS有限元软件,建立核桃壳/共聚酯热熔胶(Co-PES)粉末选择性激光烧结过程的三维温度场有限元模型,在综合考虑热传导、热对流、热辐射和随温度变化的热物性参数条件下,利用DFLUX子程序来实现热源移动轨迹控制,对其进行温度场数值模拟。通过数值模拟分析,得到了核桃壳/Co-PES粉末选择性激光烧结过程的温度场分布及变化规律以及随激光功率增加,烧结池尺寸不断增大的变化规律。并采用选择性激光烧结技术和热成像技术相结合的方法,对温度场数值模拟结果进行验证,结果表明试验结果与模拟结果能够较好地吻合。Using the ABAQUS finite element analysis software,the three-dimensional temperature field finite element model in the process of selective laser sintering with walnut shell/copolyesters(Co-PES)powder was established.In consideration of heat conduction,convection,radiation,and thermal physical parameters changing with the change of temperature,DFLUX subroutine was used to implement heat source movement trajectory control,and the numerical simulation of temperature field was carried out.Through numerical simulation analysis,the temperature field distribution and variation law in the process of selective laser sintering with walnut shell/Co-PES powder,and the variation law of increasing sintering pool size with the increase of laser power were obtained.The numerical simulation results of temperature field were verified by the combination of selective laser sintering technology and thermal imaging technology.The results show that the experimental results are in good agreement with the simulation results.

关 键 词：三维打印 选择性激光烧结 数值模拟 烧结池 温度场 

分 类 号：TB332[一般工业技术—材料科学与工程] TP391.9[自动化与计算机技术—计算机应用技术]