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http://dx.doi.org/10.7234/composres.2016.29.5.236

Half-dome Thermo-forming Tests of Thermoplastic Glass Fiber/PP Composites and FEM Simulations Based on Non-orthogonal Constitutive Models  

Lee, Wonoh (School of Mechanical Engineering, Chonnam National University)
Publication Information
Composites Research / v.29, no.5, 2016 , pp. 236-242 More about this Journal
Abstract
In this work, tensile and in-plane shear tests for thermoplastic glass fiber/polypropylene composites were performed at a thermo-forming temperature and their properties were characterized and mathematically expressed by using the non-orthogonal constitutive model. As for the thermo-forming test, half-dome experiments were carried out by varying the usage of a releasing agent and the weight of holders. As results, the optimum final shape having well-aligned symmetry and no wrinkle formation was obtained when the releasing agent was used, and it was found that the careful control of a holding force is crucial to manufacture the healthy product. Furthermore, FEM simulations based on the non-orthogonal model showed similar final shapes and tendency of wrinkle formation with experimental results, and confirmed that wrinkles increase with less holding force and higher punch force is required under high frictional condition.
Keywords
Half-dome test; Thermo-forming; Thermoplastic composites; FEM simulation; Non-orthogonal constitutive equation;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 Long, A.C., Wilks, C.E., and Rudd, C.D., "Experimental Characterisation propylene Composite," Composites Science and Technology, Vol. 61, 2001, pp. 1591-1603.   DOI
2 Lee, W., Byun, J.-H., and Cao, J., "Non-orhtogonal Constitutive Equations for Woven Fabric Textile Composites with Conjoined Tension and Shear Behaviors", Proceedings of The Korean Society for Composite Materials 2008 Fall, 2008, pp. 123-126.
3 Yu, W.R., Zampaloni, M., Pourboghrat, F., Chung, K., and Kang, T.J., "Sheet Hydroforming of Woven FRT Composites: Non-orthogonal Constitutive Equation Considering Shear Stiffness and Undulation of Woven Structure," Composite Structures, Vol. 61, 2003, pp. 353-362.   DOI
4 Harrison, P., Clifford, M.J., and Long, A.C., "Shear Characterization of Viscous Woven Textile Composites: A Comparison between Picture Frame and Bias Extension Experiments," Composites Science and Technology, Vol. 64, 2004, pp. 1453-1465.   DOI
5 Kong, H., Mouritz, A.P., and Paton, R., "Tensile Extension Properties and Deformation Mechanism of Multiaxial Non-crimp Fabrics," Composite Structures, Vol. 66, 2004, pp. 249-259.   DOI
6 Lee, W., Um, M.-K., Byun, J.-H., and Cao, J., "Characterization of In-plane Shear Behaviors of Woven Fabrics by Bias-extension and Trellis-frame Tests", The Journal of the Korean Society for Composite Materials, Vol. 23, 2010, pp. 8-14.
7 Peng, X.Q., and Cao, J., "A Continuum Mechanics-based Non-orthogonal Constitutive Model for Woven Composite Fabrics," Composites Part A: Applied Science and Manufacturing, Vol. 36. 2005, pp. 859-874.   DOI
8 Lee, W., Cao, J., Badel, P., and Boisse, P., "Non-orthogonal Constitutive Model for Woven Composites Incorporating Tensile Effect on Shear Behavior," International Journal of Material Forming, Vol. 1, 2008, pp. 891-894.   DOI
9 Lee, W., and Cao, J., "Numerical Simulations on Double-dome Forming of Woven Composites Using the Coupled Non-orthogonal Constitutive Model," International Journal of Material Forming, Vol. 2, 2009, pp. 145-148.