Manufacturing thermoplastic composite with automated fiber placement heated by ultrasonic vibration

What is it about?

The ultrasonic vibration was chosen as heat resource to manufacture the continuous fiber reinforced thermoplastic composites automatically. And the mechanical properties and crystallization behavior were compared with the hot-press method. The interfacial bonding mechanism was analyzed theoretically based on the principle of ultrasonic heating and the autohesion. The optimized parameters were acquired by the orthogonal tests with the ILSS. The experimental results indicates that the ILSS of the specimens from UAFP can match with the hot press specimens. The and the impact toughness of the UAFP specimens are 59.9% and 20.1% lower than the hot-press ones respectively which are due to the lower degree of crystalline caused by the higher cooling rate during the UAFP process. The results of DSC shows that the crystallinity of specimens made from UAFP is only 38.5%, while the 49.2% crystallinity is tested for the hot-press. The results of this paper indicated that the ultrasonic vibration could be utilized as heat resource for the automated fiber placement process of in-situ thermoplastic composites.

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Why is it important?

this wrok explains the interfacial bonding mechanism of automated fiber placement assisted by ultrasonic vibration and compare the mechanical properties and crystallization