摘要
采用有限单元法和单元生死技术,建立了聚合物熔体微滴堆叠成形温度场计算模型,模拟了聚乳酸(PLA)长方体薄板模型微滴堆叠成形过程温度场的演变规律。分析结果表明:长方体薄板模型微滴堆叠成形温度场随微滴堆叠位置的移动而呈现动态变化,微滴节点的温度曲线随结合区域发生熔合次数的变化出现不同个数的温度峰值,微滴间的结合性随熔合次数的增加而增大。模拟结果与实验结果基本吻合,较好反映了实际成形过程中零件的温度场变化。
The numerical model of temperature filed for polymer droplet deposition manufacture was established by adopting finite element method and element birth and death technology. The transient evolution of temperature filed was simulated during fabricating PLA cuboid lamella by droplets deposition. The results showed that the forming temperature filed of cuboid lamella dynamic change along with the moving of droplet depositing position,temperature curve of droplet nodes appear different number of temperature peak with the change of fusing times in the overlapping region, overlapping property of the droplets increases with the increase of the fusion frequency. The simulated result and the experimental results were in good accordance,the temperature field of the part in the actual forming process was better reflected.
出处
《塑料》
CAS
CSCD
北大核心
2017年第2期30-33,共4页
Plastics
基金
国家自然科学基金青年基金(51403014)
中央高校基本科研业务费专项资金(YS1403)
广东省科技计划项目(2016B090915001)
关键词
聚合物熔体
微滴喷射
堆叠成形
单元生死
温度场
polymer melt
droplet ejection
deposition technology
element birth and death
temperaturefield
