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http://dx.doi.org/10.7234/composres.2021.34.6.426

Residual Deformation Analysis of Composite by 3-D Viscoelastic Model Considering Mold Effect  

Lee, Hong-Jun (Aircraft Structural Design Lab, Department of Aerospace Engineering, Pusan National University)
Kim, Wie-Dae (Department of Aerospace Engineering, Pusan National University)
Publication Information
Composites Research / v.34, no.6, 2021 , pp. 426-433 More about this Journal
Abstract
The carbon fiber reinforced plastic manufacturing process has a problem in that a dimensional error occurs due to thermal deformation such as residual stress, spring-in, and warpage. The main causes of thermal deformation are various, including the shape of the product, the chemical shrinkage, thermal expansion of the resin, and the mold effect according to the material and surface condition of the mold. In this study, a viscoelastic model was applied to the plate model to predict the thermal deformation. The effects of chemical shrinkage and thermal expansion of the resin, which are the main causes of thermal deformation, were analyzed, and the analysis technique of the 3-D viscoelastic model with and without mold was also studied. Then, the L-shaped mold effect was analyzed using the verified 3D viscoelastic model analysis technique. The results show that different residual deformation occurs depending on the surface condition even when the same mold is used.
Keywords
Viscoelasticity; Mold Effect; Residual Deformation; Chemical Shrinkage; Thermal Expansion;
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1 Sung, S.H., and Kim, W.D., "Prediction of Deformation of Carbon-fiber Reinforced Polymer Matrix Composite for Tool Materials and Surface Conditions," Journal of Composite Materials, Vol. 27, No. 6, 2014, pp. 231-235.
2 Kim, Y.K., and White, S.R., "Stress Relaxation Behavior of 3501-6 Epoxy Resin During Cure", Polymer Engineering & Science, Vol. 36, No. 23, 1996, pp. 2852-2862.   DOI
3 White, S.R., and Hahn, T.H., "Process Modeling of Composite Materials: Residual Stress Development during Cure. Part II. Experimental Validation," Journal of Composite Materials, Vol. 26, No. 16, 1992, pp. 2423-2453.   DOI
4 Jung, S.R., Kim, W.D., and Jim, J.H., "Analysis of Thermal Deformation of Carbon-fiber Reinforced Polymer Matrix Composite Considering Viscoelasticity," Journal of the Korean Society for Composite Materials, Vol. 27, No. 4, 2014, pp. 174-181.
5 Hubert, P., Johnston, A., Poursartip, A., and Nelson, K., "Cure Kinetics and Viscosity Models for Hexcel 8552 Epoxy Resin," International SAMPE Symposium and Exhibition, SAMPE 1999, pp. 2341-2354.
6 White, S.R., and Kim, Y.K., "Process-Induced Residual Stress Analysis of AS4/3501-6 Composite Material," Mechanics of Composite Materials and Structures, Vol. 5, No. 2, 1998, pp. 153-186.   DOI
7 Kim, Y.K., and White, S.R., "Process-induced Stress Relaxation Analysis of AS4/3501-6 Laminate," Journal of Reinforced Plastics and Composites, Vol. 16, No. 1, 1997, pp. 2-16.   DOI
8 Seong, D.Y., and Kim, W.D., "Thermal Deformation Analysis of L-shaped Composite During Cure Process by Viscoelastic Model," Journal of the Korean Society for Composite Materials, Vol. 33, No. 4, 2020, pp. 220-227.
9 Kim, Y.S., and Kim, W.D., "Prediction of Spring-in Deformation of carbon Fiber Reinforced Composite by Thermal Residual Stress", Journal of the Korean Society for Composite Materials, Vol. 30, No. 6, 2017, pp. 410-415.
10 Zhang, G., Wang, J., Ni, A., Hu, H., Ding, A., and Li, S., "Process-induced Deformation of L-shaped Variable-stiffness Composite Structures During Cure", Composite Structures, Vol. 230, 2019, 111461.   DOI
11 Choi, E.S., and Kim, W.D., "Thermal Deformation of Carbon Fiber Reinforced Composite by Cure Shrinkage," Journal of the Korean Society for Composite Materials, Vol. 31, No. 6, 2018, pp. 404-411.