Comparison and numerical simulation of single/double diaphragm forming of thermosetting carbon fiber prepreg

doi:10.19936/j.cnki.2096-8000.20240228.016

Abstract

Abstract: Hot diaphragm forming process is a method for rapid forming of preforms combining the advantages of automatic laying technology. In order to compare the difference of the preform formed by single and double diaphragm forming process, a hot diaphragm forming process device was used to form the C-type preform. The influence of temperature, layup sequence, number of layers, size of preforms and forming type on the quality of prepregs was evaluated by observing the size and position of the wrinkle. Moreover, the simulation model of hot diaphragm forming is established and compared with the experimental results. The results show that reducing the overlay combination of [45°/0°] can effectively reduce the wrinkle generation. 0° ply is easy to induce the generation of wrinkle when pressed. The thicker the preform is, the more likely it is to cause defects. For the C-shaped preform, the double diaphragm forming has better forming quality than the single diaphragm forming, especially in inhibiting the generation of wrinkle at the cap. Moreover, the thermal diaphragm forming simulation model based on ABAQUS can predict the wrinkle accurately.

Key words: hot diaphragm forming, prepreg, numerical simulation, wrinkle, preform, composites

CLC Number:

TB332

ZHAO Yueqing, LIN Dezhi, CHEN Ping, TANG Jiali. Comparison and numerical simulation of single/double diaphragm forming of thermosetting carbon fiber prepreg[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(2): 109-118.

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