Experimental and Numerical Studies on Fiber Deformation and Formability in Thermoforming Process Using a Fast-Cure Carbon Prepreg: Effect of Stacking Sequence and Mold Geometry
A fast-cure carbon fiber/epoxy prepreg was thermoformed against a replicated automotive roof panel mold (square-cup) to investigate the effect of the stacking sequence of prepreg layers with unidirectional and plane woven fabrics and mold geometry with different drawing angles and depths on the fibe...
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doaj-de7b4221b76e44b892ada9e89f0fde632020-11-24T22:57:48ZengMDPI AGMaterials1996-19442018-05-0111585710.3390/ma11050857ma11050857Experimental and Numerical Studies on Fiber Deformation and Formability in Thermoforming Process Using a Fast-Cure Carbon Prepreg: Effect of Stacking Sequence and Mold GeometryDaeryeong Bae0Shin-O. Kim1Wonoh Lee2Jin Woo Yi3Moon Kwang Um4Dong Gi Seong5Advanced Materials Engineering, University of Science and Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, KoreaKorea Aerospace Industries (KAI), 78 Gongdanro 1-ro, Sanam-myeon, Sacheon, Gyungnam 52529, KoreaSchool of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, KoreaKorea Institute of Materials Science (KIMS), 797 Changwon-daero, Changwon, Gyungnam 51508, KoreaKorea Institute of Materials Science (KIMS), 797 Changwon-daero, Changwon, Gyungnam 51508, KoreaDepartment of Polymer Science and Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, KoreaA fast-cure carbon fiber/epoxy prepreg was thermoformed against a replicated automotive roof panel mold (square-cup) to investigate the effect of the stacking sequence of prepreg layers with unidirectional and plane woven fabrics and mold geometry with different drawing angles and depths on the fiber deformation and formability of the prepreg. The optimum forming condition was determined via analysis of the material properties of epoxy resin. The non-linear mechanical properties of prepreg at the deformation modes of inter- and intra-ply shear, tensile and bending were measured to be used as input data for the commercial virtual forming simulation software. The prepreg with a stacking sequence containing the plain-woven carbon prepreg on the outer layer of the laminate was successfully thermoformed against a mold with a depth of 20 mm and a tilting angle of 110°. Experimental results for the shear deformations at each corner of the thermoformed square-cup product were compared with the simulation and a similarity in the overall tendency of the shear angle in the path at each corner was observed. The results are expected to contribute to the optimization of parameters on materials, mold design and processing in the thermoforming mass-production process for manufacturing high quality automotive parts with a square-cup geometry.http://www.mdpi.com/1996-1944/11/5/857thermoformingprepregcarbon fiberfast-cure epoxy resin |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Daeryeong Bae Shin-O. Kim Wonoh Lee Jin Woo Yi Moon Kwang Um Dong Gi Seong |
spellingShingle |
Daeryeong Bae Shin-O. Kim Wonoh Lee Jin Woo Yi Moon Kwang Um Dong Gi Seong Experimental and Numerical Studies on Fiber Deformation and Formability in Thermoforming Process Using a Fast-Cure Carbon Prepreg: Effect of Stacking Sequence and Mold Geometry Materials thermoforming prepreg carbon fiber fast-cure epoxy resin |
author_facet |
Daeryeong Bae Shin-O. Kim Wonoh Lee Jin Woo Yi Moon Kwang Um Dong Gi Seong |
author_sort |
Daeryeong Bae |
title |
Experimental and Numerical Studies on Fiber Deformation and Formability in Thermoforming Process Using a Fast-Cure Carbon Prepreg: Effect of Stacking Sequence and Mold Geometry |
title_short |
Experimental and Numerical Studies on Fiber Deformation and Formability in Thermoforming Process Using a Fast-Cure Carbon Prepreg: Effect of Stacking Sequence and Mold Geometry |
title_full |
Experimental and Numerical Studies on Fiber Deformation and Formability in Thermoforming Process Using a Fast-Cure Carbon Prepreg: Effect of Stacking Sequence and Mold Geometry |
title_fullStr |
Experimental and Numerical Studies on Fiber Deformation and Formability in Thermoforming Process Using a Fast-Cure Carbon Prepreg: Effect of Stacking Sequence and Mold Geometry |
title_full_unstemmed |
Experimental and Numerical Studies on Fiber Deformation and Formability in Thermoforming Process Using a Fast-Cure Carbon Prepreg: Effect of Stacking Sequence and Mold Geometry |
title_sort |
experimental and numerical studies on fiber deformation and formability in thermoforming process using a fast-cure carbon prepreg: effect of stacking sequence and mold geometry |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2018-05-01 |
description |
A fast-cure carbon fiber/epoxy prepreg was thermoformed against a replicated automotive roof panel mold (square-cup) to investigate the effect of the stacking sequence of prepreg layers with unidirectional and plane woven fabrics and mold geometry with different drawing angles and depths on the fiber deformation and formability of the prepreg. The optimum forming condition was determined via analysis of the material properties of epoxy resin. The non-linear mechanical properties of prepreg at the deformation modes of inter- and intra-ply shear, tensile and bending were measured to be used as input data for the commercial virtual forming simulation software. The prepreg with a stacking sequence containing the plain-woven carbon prepreg on the outer layer of the laminate was successfully thermoformed against a mold with a depth of 20 mm and a tilting angle of 110°. Experimental results for the shear deformations at each corner of the thermoformed square-cup product were compared with the simulation and a similarity in the overall tendency of the shear angle in the path at each corner was observed. The results are expected to contribute to the optimization of parameters on materials, mold design and processing in the thermoforming mass-production process for manufacturing high quality automotive parts with a square-cup geometry. |
topic |
thermoforming prepreg carbon fiber fast-cure epoxy resin |
url |
http://www.mdpi.com/1996-1944/11/5/857 |
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