摘要
基于三维模型,且同时考虑壁面滑移和黏度的压力依赖性,建立了纤维增强聚合物薄壁注塑件翘曲模拟有限元模型,分析了模型维度、壁面滑移和黏度的压力依赖性对注塑件翘曲模拟的影响,讨论了主要工艺参数对注塑件最大翘曲变形量的影响规律。结果表明,模型维度对注塑件翘曲模拟的影响最大,黏度的压力依赖性次之,壁面滑移最小;注塑件最大翘曲变形量随注射速率、熔体温度和模具温度的升高而增大,随保压压力的升高而减小,且影响最为显著,随保压时间的延长变化不明显。
Based on the three-dimensional model,a finite element model for warpage simulation of fiber-reinforced polymer thin-wall injection-molded parts was established simultaneously considering wall slip and pressure dependence of viscosity in this work.The effects of model dimension,wall slip,and pressure dependence of viscosity on the warpage simulation of injection-molded parts were analyzed.The influences of main process parameters on the maximum warpage deformation of injection-molded parts were subsequently discussed.The results show that the model dimension has the greatest influence on warpage simulation,followed by the pressure dependence of viscosity,and the wall slip has the smallest influence on warpage simulation;the maximum warpage deformation of injection-molded parts increases with the increase of injection rate,melt temperature and mold temperature,while it decreases significantly with the increase of holding pressure and changes slightly with the increase of holding time.
作者
江青松
张伟
柳和生
Qingsong Jiang;Wei Zhang;Hesheng Liu(School of Mechanical and Electronic Engineering,East China University of Technology,Nanchang 330013,China;School of Mechatronics and Vehicle Engineering,East China Jiao Tong University,Nanchang 330013,China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2023年第7期85-89,共5页
Polymer Materials Science & Engineering
基金
江西省教育厅科学技术研究项目(GJJ2200723)
江西省新能源工艺及装备工程技术研究中心开放基金(JXNE2021-06)
东华理工大学博士基金(DHBK2019172)。
关键词
纤维增强聚合物
薄壁注塑
模型维度
壁面滑移
黏度的压力依赖性
翘曲变形
fiber-reinforced polymer
thin-wall injection molding
model dimension
wall slip
pressure dependence of viscosity
warpage deformation
