|標題：Geometrical Effects on Fiber Micro-structure Variations and the Influences on Long Fiber Reinforced Thermoplastics (FRT) Parts|
|作品名稱||Geometrical Effects on Fiber Micro-structure Variations and the Influences on Long Fiber Reinforced Thermoplastics (FRT) Parts|
|著者||Chao-Tsai (CT) Huang; Chia Hsu; Yi-Sheng Chen; Sheng-Jye Hwang; Hsin-Shu Peng; Chih-Che Wu; Chun-I Tu|
|著錄名稱、卷期、頁數||SPE Technical Papers 61, p. 1-6|
|摘要||Due to its great potential and capability, the fiber-reinforced thermoplastics (FRT) material and technology have been applied into industry recently. However, due to the microstructures of fiber inside plastic matrix are very complex, they are not easy to be visualized. The connection from microstructures to the final shrinkage/warpage is far from our understanding.
In this study, we have performed a benchmark with three standard specimens based on ASTM D638 where those specimens have different gate designs. Due to the geometrical effect, the warpage behaviors are quite different for those three specimens. Specifically, it causes one specimen warped downward and bended inward, another warped upward, and the other slightly upward at the same time. The difference might be due to the interaction of the entrance effect of molten plastic with fiber content to cause high asymmetrical fiber orientation distribution (FOD). Moreover, the experimental study is also performed to validate the simulation results. From short shot testing to the warpage and bending measurement for each individual model, overall, the tendency for both numerical simulation and experimental results is in a reasonable agreement. However, to get better understanding between the microstructures of the fibers and the final shrinkage/warpage, the mechanism of long fibers still needs for further more study.
|關鍵字||Fiber Micro-structure;Long Fiber Reinforced Thermoplastics (FRT);fiber orientation|