Sage Journals: Discover world-class research

Abstract

Using finite element program generator (FEPG) of Beijing Feijian Software Corporation, a relative finite element procedure is developed for the three-dimensional viscoplasticity model which can characterize well the nonlinear behavior and strain-rate dependence behavior of thermoplastic composite, AS4-PEEK. Interlaminar stresses of angle-ply laminates []_s for different strain rates under uniaxial tension are calculated. The effects of the variation of strain rates on interlaminar stresses in the vicinity of free edges of AS4-PEEK composite laminates are investigated. From the three-dimensional plots of the interlaminar stresses, it can be seen that distant free-edge effects and end-edge effects exist in the angle-ply laminates []_s. The interlaminar stresses in free-edges and two ends increase with increasing strain rates. The extents to which the strain rates affect interlaminar stresses are depicted.

Keywords

polymer-matrix composites interface nonlinear behavior anisotropy computational simulation

Get full access to this article

View all access options for this article.

References

Zhao, J. H. , Wang, X. F. , Dharani, L. R. and Wei, J. (2000). Notch Stress Concentration and Failure Characteristics in Laminates with Triple Parallel Notches , Composites Science and Technology, 60(15): 2865-2872 .

Sayman, Onur (2002). Elastic-plastic and Residual Stresses in Symmetric Thermoplastic Laminates Plates under a Linear Thermal Loading , Composites Science And Technology, 62(9): 1231-1238 .

Ozcan, R. (2000). Elastic-plastic Stress Analysis in Thermoplastic Composites Laminated Plates under In-plane Loading , Composite Structures, 49(2): 201-208 .

Arslan, Nurettin , Celik, Mehmet and Arslan, Nuray . (2002). Prediction of the Elastic-plastic Behaviour of Thermoplastic Composite Laminated Plates ([0/]2) with Square Hole , Composite Structures, 55(1): 37-49 .

Tong, J. W. , Xie, M. Y. , Shen, M. and Li, H. Q. (2001). The Interlaminar Stresses of Symmetric Composites Laminates , Reinforced Plastics & Composites, 20(13): 1171-1182 .

Lifshitz, J. (1976). Impact Strength of Angle-ply Fiber Reinforced Materials , Journal of Composite Materials, 10(1): 92-101 .

Powers, B. M. , Vinson, J. R. , Wardle, M. and Scott, B. (1995). High Strain Rate Effects on Two AS4 Graphite Fiber Polymer Matrix Composites, In: Rajapakse, Y. D. S. and Vinson, J. R. (eds), High Strain Rate Effects on Polymer, Metal and Ceramic Matrix Composites and Other Advanced Materials, AD-Vol.48, ASME, New York , pp. 179-190.

Vogler, T. J. and Kyriakides, S. (1999). Inelastic Behaviour of an AS4/PEEK Composite under Combined Transverse Compression and Shear , International Journal of Plasticity, 15(8): 783-806 .

Gates, T. S. and Sun, C. T. (1991). Elastic/Viscoplastic Constutive Model for Fiber Reinforced Thermoplastic Composites , AIAA J., 29(3): 457-463 .

10.

Malvern, L. E. (1951). The Propagation of Longitudinal Waves of Plastic Deformation in a Bar of Material Exhibiting a Strain-rate Effect , ASME J. Appl. Mech., 18: 203-208 .

11.

Yoon, K. J. and Sun, C. T. (1991). Characterization of Elastic-viscoplastic Properties of an AS4/PEEK Thermoplastic Composites , J. Compos. Mater., 25(10): 1277-1296 .

12.

Weeks, C. A. and Sun, C. T. (1998). Modeling Nonlinear Rate-dependent Behaviour in Fiber-reinforced Composites , Composites Science and Technology, 58(3-4): 603-611 .

13.

Kant, T. and Swaminathan, K. (2000). Estimation of Transverse/Interlaminar Stresses in Laminated Composites - A Selective Review and Survey of Current Developments , Compos. Struct. 49(1): 65-75 .

Strain-rate Dependence of Interlaminar Stress Fields in the Vicinity of Free Edges of AS4-PEEK Composite Laminates Under Uniaxial Tension

Abstract

Keywords

Get full access to this article

References