Thermal Simulation and Warping Deformation Experimental Study of PEEK in Material Extrusion,Macromolecular Theory and Simulations

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Thermal Simulation and Warping Deformation Experimental Study of PEEK in Material Extrusion
Macromolecular Theory and Simulations ( IF 1.8 ) Pub Date : 2020-11-17 , DOI: 10.1002/mats.202000055
Jiang Han ₁ , Ju Tong ₁ , Xiaoqing Tian ₁ , Lian Xia ₁ , Dingyifei Ma ₁

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Polyether‐ether‐ketone (PEEK) is a high‐performance biomaterial, which can be used to fabricate dentures, mandible, and other human implants. However, when the material extrusion (MEX) method is employed to print parts using PEEK material, the parts are prone to warpage deformation, which affects the fabrication quality of PEEK parts. Moreover, the uneven temperature field adversely affects the crystallization of PEEK, causing the printed objects with hazel appearance which affects the beauty of the denture. In this paper, finite element analysis is initially performed to study the temperature and stress fields of PEEK under different printing parameters in MEX. Second, the response surface method is used to evaluate the accuracy of the simulation results. Furthermore, a mathematical model of the relationship between warping deformation and the affecting factors during MEX is obtained. The simulation and experimental results show that the temperature field, stress field, and final warping deformation are positively correlated with the extruded filament width, printing speed, and molding chamber temperature, while they are negatively correlated with the nozzle temperature. The impact of each parameter in a descending order is: extruded filament width, printing speed, molding chamber temperature, and nozzle temperature.

中文翻译：

PEEK材料挤出的热模拟与翘曲变形实验研究。

聚醚醚酮（PEEK）是一种高性能的生物材料，可用于制造假牙，下颌骨和其他人体植入物。但是，当采用材料挤出（MEX）方法使用PEEK材料打印零件时，零件容易发生翘曲变形，从而影响PEEK零件的制造质量。而且，不均匀的温度场不利地影响PEEK的结晶，导致印刷品具有淡褐色外观，从而影响义齿的美观。本文首先进行了有限元分析，以研究MEX中不同印刷参数下PEEK的温度和应力场。其次，使用响应面法评估仿真结果的准确性。此外，建立了MEX过程中翘曲变形与影响因素关系的数学模型。仿真和实验结果表明，温度场，应力场和最终翘曲变形与挤出的长丝宽度，印刷速度和成型室温度呈正相关，而与喷嘴温度呈负相关。每个参数按降序排列的影响是：挤出的长丝宽度，印刷速度，成型室温度和喷嘴温度。而它们与喷嘴温度呈负相关。每个参数按降序排列的影响是：挤出的长丝宽度，印刷速度，成型室温度和喷嘴温度。而它们与喷嘴温度呈负相关。每个参数按降序排列的影响是：挤出的长丝宽度，印刷速度，成型室温度和喷嘴温度。

更新日期：2020-11-17

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