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Evaluation of Stamp Forming Process Parameters for CF/PEKK Thermoplastic Composite Using Finite Element Method

Authors
Lee, Keung-InChoe, Hyeon-SeokKwak, June-WooLee, Jun-SungJu, Hyun-WooKweon, Jin-HweNam, Young-Woo
Issue Date
Oct-2021
Publisher
KOREAN SOC COMPOSITE MATERIALS
Keywords
Thermoplastic composite; Stamp forming process; Forming simulation; Crystallinity; Void content
Citation
COMPOSITES RESEARCH, v.34, no.5, pp.296 - 304
Indexed
KCI
Journal Title
COMPOSITES RESEARCH
Volume
34
Number
5
Start Page
296
End Page
304
URI
https://scholarworks.bwise.kr/gnu/handle/sw.gnu/3181
DOI
10.7234/composres.2021.34.5.296
ISSN
2288-2103
Abstract
This study presented the evaluation of the stamp forming process for L-shape CF/PEKK thermoplastic composite using the finite element model. The formability of three different trimming allowances has been examined for representative product geometry. The results showed that those manufactured by high trimming allowance showed more excellent formability in those areas. Moreover, the effects of the trimming allowances on the stress, thickness, wrinkle distributions of thermoplastic composites fabricated with the stamp forming process were evaluated. The comparison of the simulation and experimental results for the thickness and wrinkle distributions proved the accuracy of the stamp forming model. The crystallinity of the composite was performed by differential scanning calorimetry (DSC). The void content of the composite was evaluated by matrix digestion. Then, the fabricated structure was characterized and achieved high quality in crystallinity and void content. Consequently, the presented FEM modeling shows excellent potential for application in the aircraft product design process. This pragmatic approach could efficiently offer a valuable solution for the thermoplastic composite manufacturing field.
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Kweon, Jin Hwe
대학원 (기계항공우주공학부)
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