A one-parameter plasticity model was shown to adequately describe the plastic deformation of AS4/PEEK (APC-2) unidirectional thermoplastic composite. This model was verified further for unidirectional and laminated composite panels with and without a hole. The elastic-plastic stress-strain relations of coupon specimens were mea sured and compared with those predicted by the finite element analysis using the one- parameter plasticity model. The results show that the one-parameter plasticity model is suitable for the analysis of elastic-plastic deformation of AS4/PEEK composite laminates.
Get full access to this article
View all access options for this article.
References
1.
Hahn, H.T. and S.W. Tsai.1973. "Nonlinear Elastic Behavior of Unidirectional Composite Laminae,"Journal of Composite Materials , 7:102-118.
2.
Dvorak, G.J. and Y.A. Bahei-El-Din .1979. "Elastic-Plastic Behavior of Fibrous Composites,"Journal of Mechanics and Physics of Solids, 27:51-72.
3.
Dvorak, G.J. and Y.A. Bahei-El-Din .1982. "Plasticity Analysis of Fibrous Composites,"Journal of Applied Mechanics , 49:327-335.
4.
Bahei-El-Din, Y.A. and G.J. Dvorak.1980. "Plastic Deformation of a Laminated Plate with a Hole,"Journal of Applied Mechanics, 47:827-832.
5.
Sun, C.T. and J.L. Chen.1989. "A Simple Flow Rule for Characterizing Nonlinear Behavior of Fiber Composites,"Journal of Composite Materials, 23:1009-1020.
6.
Sun, C.T. and K.J. Yoon.1988. "Characterization of Elastic-Plastic Properties of AS4/APC-2 Thermoplastic Composite,' CML 88-2, School of Aeronautics and Astronautics, Purdue University.
7.
Chen, W.F. and D.J. Han.1988. Plasttcity for Structural EngineersNew York: Springer-Verlag, Inc .
8.
Jones, R.M.1975. Mechanics of Composite MaterialsNew York, NY: McGraw-Hill Company.
9.
Kim, K.S., H.T. Hahn and R.B. Croman.1989. "The Effect of Cooling Rate on Residual Stress in a Thermoplastic Composite,"Journal of Composite Technology and Research, 11(2):47-52.
10.
Jeronimidis, G. and A.T. Parkyn.1988. "Residual Stress in Carbon Fibre-Thermoplastic Matrix Laminates,"Journal of Composite Materials, 22:401-415.
11.
Chen, G.1988. "Nonlinear Finite Element Analysis of Plates and Shells of Composite Laminates," M.S. thesis, School of Aeronautics and Astronautics, Purdue University.
