Nylon12/HDPE激光烧结数值模拟及其实验研究  

Numerical Simulation and Experimental Study of Nylon12/HDPE Sintered Parts

作　　者：任乃飞[1] 罗艳[1] 王攀[1] 陈秋月[1] 

机构地区：[1]江苏大学机械学院,江苏镇江212013

出　　处：《应用激光》2010年第4期270-274,共5页Applied Laser

摘　　要：为了较准确描述激光烧结时温度场的分布特性,初步建立了用于模拟尼龙12/HDPE(HighDensity Polyethylene,高密度聚乙烯粉末激光烧结过程中传热行为的数学模型,该模型考虑了诸如热传导等与烧结有关的热现象。在热物性参数呈非线性变化的情况下,采用ANSYS参数化设计语言处理移动热源,对烧结材料的温度场进行了数值模拟,通过试验对模拟结果进行检测,并用扫描电镜对烧结样品进行分析。模拟结果表明,最高温度点滞后于光斑中心,试验测量值与模拟值误差在3.6%以内。模拟结果与初步实验结果较为吻合。In order to describe temperature field characteristic exactly, the math model of the temperature field of selective laser sintering Nylonl2/HDPE（High Density Polyethylene）is established. Under the situation that the thermo physical parameters is changing with nonlinear, using ANSYS parametric design language to treat moving heat source and numerical simulation of temperature field of sintered parts is achieved. The vaule of simulation is detected by experiment. The microstructure of laser- sintering Nylonl2/HDPE is examined by scanning electron microscopy. The simulation results show that the maximum temper- ature node lag the center of laser beam and the error between measure value and simulation less than 3.6%. Simulation results are anastomosed with experiment.

关 键 词：激光技术 激光烧结 数值模拟 温度场 吻合 

分 类 号：TB332[一般工业技术—材料科学与工程]