模内微装配成型运动副界面损伤变形模拟分析  

Simulation and Analysis of Kinematic Pair Interfacial Damage Deformation from In⁃mold Micro Assembly Molding Process

作　　者：周国发 张馨予 傅彬益 ZHOU Guofa;ZHANG Xinyu;FU Binyi(School of Resources,Environmental and Chemical Engineering,Nanchang University,Nanchang 330031,China)

机构地区：[1]南昌大学资源环境与化工学院,南昌330031

出　　处：《中国塑料》2021年第6期60-67,共8页China Plastics

基　　金：国家自然科学基金(21464009)。

摘　　要：微装配界面损伤变形是模内微装配成型先进技术工业化应用的主要瓶颈之一。针对此问题,研究建立了模内微装配界面的损伤变形仿真技术,研究表明,在配合界面迎流面棱边附近的近表面,易诱发凹陷垮塌和黏性拖曳飞边二种损伤变形,损伤变形与二次成型注射速度呈先降后增的抛物线型演化规律,且与热流固耦合垮塌驱动压力、黏弹性支撑垮塌驱动正应力和黏性拖曳飞边驱动剪切应力呈现正关联关系,而与连续相变演化区域的厚度呈现负关联关系,减小热流固耦合冲击载荷和连续相变演化区域的厚度,有利于抑制运动副配合界面的损伤变形。The micro assembly interfacial damage deformation is one of the main bottleneck issues in the industrial applica⁃tion of advanced in⁃mold micro assembly technology.Aiming at this issue,the simulation technology of interfacial dam⁃age deformation was established for in⁃mold micro assembly molding.The results indicated that two types of interfacial damage deformation of depression collapse and viscous drag flying edge were easily induced near the surface of the lead⁃ing edge for upstream micro assembly Interface.The interfacial damage deformation exhibited a parabola evolution law with the injection speed of the secondary molding process,which decreased at first and then tended to increase.This was positively correlated with the depression collapse driven pressure of thermal fluid solid coupling,the depression collapse⁃driven normal stress of viscoelastic support and the flying edge driven shear stress of viscous drag.However,it was nega⁃tively correlated with the evolution region thickness of continuous phase transition.The reduction of the thermal fluid sol⁃id coupling impact load and the thickness of continuous phase transformation evolution region is beneficial to the depres⁃sion of the kinematic pair interfacial damage deformation.

关 键 词：聚合物 微型机械 模内微装配成型 损伤变形 模拟 

分 类 号：TQ320[化学工程—合成树脂塑料工业]