TY - CONF
T1 - Study on the flow-fiber coupling effect and its influence on the shrinkage of fiber-reinforced plastic (frp) injection parts
AU - Lai, Cheng Hong
AU - Huang, Chao Tsai
AU - Chu, Jia Hao
AU - Fu, Wei Wen
AU - Hwang, Sheng Jye
AU - Peng, Hsin Shu
AU - Wu, Chih Che
AU - Tu, Chun I.
N1 - Funding Information:
The authors would like to thank Ministry of Science and Technology of Taiwan, R.O.C. (Project number: MOST 108-2221-E-032-013-MY2) for partly financially supporting for this research. The authors deeply appreciate Dr. Tzu Hung (Dusty) Lin, Dr. Likey Chen and their team from MCL Multiscale X-ray CT laboratory, Industrial Technology Research Institute (Taiwan) for great technology supports in -CT scan measuring experiments. The authors also deeply appreciate Dr. Huan-Chang Tseng (Moldex3D) for his consulting the iARD-RPR and the revised IISO models.
Publisher Copyright:
© 2021 Society of Plastics Engineers. All rights reserved.
PY - 2021
Y1 - 2021
N2 - The fiber-reinforced plastics (FRP) material has been applied into industry as one of the major lightweight technologies, especially for automotive or aerospace products. The reason why fibers can enhance plastics is because of their microstructures. One of those microstructures is fiber orientation distribution. Since the fiber orientations inside plastic matrix are very complex, they are not easy to be visualized and managed. In addition, there might be some interaction between flow and fiber during the injection molding processing, but not fully understood yet. In this study, the flow-fiber coupling effect on FRP injection parts has been investigated using a geometry system with three ASTM D638 specimens. The study methods include both numerical simulation and experimental observation. Results showed that in the presence of flow-fiber coupling the melt flow front advancement presents some variation, specifically at the geometrical corners of the system. Furthermore, through the fiber orientation distribution (FOD) study, the flow-fiber coupling effect is not significantly at the near gate region (NRG). It might result from too strong shear force to hold down the appearance of the flow-fiber interaction. However, at the end of filling region (EFR), the flow-fiber coupling effect tries to diminish the flow direction orientation tensor component A11 and enhance the cross-flow orientation tensor component A22 simultaneously. It ends up with the cross-flow direction dominant at the EFR. This orientation distribution behavior variation has been verified using micro-computerized tomography (μ-CT) scan and images analysis by AVIZO software. Finally, the flow-fiber coupling effect also verified based on the tensile stress testing and the shrinkage of the injected parts through different flow domains.
AB - The fiber-reinforced plastics (FRP) material has been applied into industry as one of the major lightweight technologies, especially for automotive or aerospace products. The reason why fibers can enhance plastics is because of their microstructures. One of those microstructures is fiber orientation distribution. Since the fiber orientations inside plastic matrix are very complex, they are not easy to be visualized and managed. In addition, there might be some interaction between flow and fiber during the injection molding processing, but not fully understood yet. In this study, the flow-fiber coupling effect on FRP injection parts has been investigated using a geometry system with three ASTM D638 specimens. The study methods include both numerical simulation and experimental observation. Results showed that in the presence of flow-fiber coupling the melt flow front advancement presents some variation, specifically at the geometrical corners of the system. Furthermore, through the fiber orientation distribution (FOD) study, the flow-fiber coupling effect is not significantly at the near gate region (NRG). It might result from too strong shear force to hold down the appearance of the flow-fiber interaction. However, at the end of filling region (EFR), the flow-fiber coupling effect tries to diminish the flow direction orientation tensor component A11 and enhance the cross-flow orientation tensor component A22 simultaneously. It ends up with the cross-flow direction dominant at the EFR. This orientation distribution behavior variation has been verified using micro-computerized tomography (μ-CT) scan and images analysis by AVIZO software. Finally, the flow-fiber coupling effect also verified based on the tensile stress testing and the shrinkage of the injected parts through different flow domains.
UR - http://www.scopus.com/inward/record.url?scp=85111566189&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85111566189&partnerID=8YFLogxK
M3 - Paper
AN - SCOPUS:85111566189
T2 - 2021 SPE Annual Technical Conference, ANTEC 2021
Y2 - 10 May 2021 through 21 May 2021
ER -