The behavior of unidirectional (UD) and woven fabric (WF) laminates has been studied under low velocity impact using a 3D transient finite element code. The failure evaluation of the laminates used a failure function based on Tsai Hill criterion. The studies were carried out for both simply supported and clamped boundary conditions with plate geometry 150 x 150 x 8 mm. Incident impact velocity of 5 m/s and impactor mass of 50 gm were considered. It was observed that the failure function is lower for WF laminates than for UD laminates indicating that WF laminates are more resistant to impact damage.
4. Jang, B. Z.1994. Advanced Polymer Composites. Materials Park. Ohio:ASM International, pp. 167-198.
5.
5. Richardson, M. O. W. and M. J. Wisheart. 1996. "Review of Low Velocity Impact Properties of Composite Materials,"Composites Part A, 27A: 1123-1131.
6.
6. Takeda, N., R. L. Sierakowski. 1981. "Transverse Cracks in Glass/Epoxy Cross Ply Laminates Impacted by Projectiles,"Journal of Materials Science Letters, 16:2008-2011.
7.
7. Joshi, S. P. and C. T. Sun. 1985. "Impact Induced Fracture in a Laminated Composite,"Journal of Composite Materials, 19:51-66.
8.
8. Joshi, S. P. and C. T. Sun. 1987. "Impact Induced Fracture in a Quasiisotropic Laminate,"Journal of Composites Technology and Research, 9:40-46.
9.
9. Wu, H. T. and G. S. Springer. 1988. "Measurement of Matrix Cracking and Delamination Caused by Impact on Composite Plate,"Journal of Composite Materials, 22:518-532.
10.
10. Liu, D.1988. "Impact Induced Delamination A View of Bending Stiffness Mismatch,"Journal of Composite Materials, 22:674-692.
11.
11. Wu, H. T. and G. S. Springer. 1988. "Impact Induced Stresses, Strains, and Delaminations in Composite Plates,"Journal of Composite Materials, 22:533-568.
12.
12. Sun, C. T. and M. G. Manoharan. 1989. "Growth of Delamination Crack Due to Bending in [905/05/905] laminate,"Composites Science and Technology, 34:365-377.
13.
13. Choi, H. Y., H. T. Wu and F. K. Chang. 1991. "A New Approach toward Understanding Damage Mechanisms and Mechanics of Laminated Composites Due to Low Velocity Impact: Part I Experiments,"Journal of Composite Materials, 25:992-1011.
14.
14. Choi, H. Y., H. T. Wu and F. K. Chang. 1991. "A New Approach toward Understanding Damage Mechanisms and Mechanics of Laminated Composites Due to Low Velocity Impact: Part II Analysis,"Journal of Composite Materials, 25:1012-1038.
15.
15. Choi, H. Y., H. S. Wang and F. K. Chang. 1992. "Effect of Laminate Configuration and Impactor's Mass on the Initial Impact Damage of Graphite/Epoxy Composite Plates Due to Line Loading Impact,"Journal of Composite Materials, 26:804-827.
16.
16. Choi, H. Y. and F. K. Chang. 1992. "A Model for Predicting Damage in Graphite/Epoxy Laminated Composites Resulting from the Low Velocity Point Impact,"Journal of Composite Materials, 26:2134-2169.
17.
17. Razi, H. and A. S. Kobayashi. 1993. "Delamination in Crossply Laminated Composite Subjected to Low Velocity Impact,"AIAA Journal, 31:1498-1502.
18.
18. Jih, C. J. and C. T. Sun. 1993. "Prediction of Delamination in Composite Laminates Subjected to Low Velocity Impact,"Journal of Composite Materials, 27:684-701.
19.
19. Finn, S. R. and G. S. Springer. 1993. "Delamination in Composite Plates under Transverse Static or Impact Loads A Model,"Composite Structures, 23:177-190.
20.
20. Davies, G. A. O., X. Zhang, G. Zhou and S. Watson. 1994. "Numerical Modeling of Impact Damage,"Composites, 25:342-350.
21.
21. Erarslanoglu, G. et al. 1994. "A Method of Failure Prediction in Laminated Composites Subjected to Low Velocity Impact," in PD Vol. 64-2, Engineering Systems Design and Analysis, edited by Veniali et al., ASME, 111-118.
22.
22. Wang, H. and T. VuKhanh. 1994. "Damage Extension in Carbon Fiber/PEEK Cross Ply Laminates under Low Velocity Impact,"Journal of Composite Materials, 28:684-707.
23.
23. Liu, S. and F. K. Chang. 1994. "Matrix Cracking Effect on Delamination Growth in Composite Laminates Induced by a Spherical Indenter,"Journal of Composite Materials, 28:940-977.
24.
24. Lammerant, L. and I. Verpoest. 1994. "The Interaction between Matrix Cracks and Delaminations during Quasi Static Impact of Composites,"Composites Science and Technology, 51:504-516.
25.
25. Wang, H. and T. Vu. Kanh. 1995. "Fracture Mechanics and Mechanisms of Impact Induced Delamination in Laminated Composites,"Journal of Composite Materials, 29:156-178.
26.
26. Lammerant, L. and I. Verpoest. 1996. "Modeling of the Interaction between Matrix Cracks and Delaminations during Impact of Composite Plates,"Composites Science and Technology, 56:1171-1178.
27.
27. Davies, G. A. O., D. Hitchings and G. Zhou. 1996. "Impact Damage and Residual Strengths of Woven Fabric Glass/Polyester Laminates,"Composites Part A, 27A: 1147-1156.
28.
28. Timoshenko, S. P. and J. N. Goodier. Theory of Elasticity, Third edition.Singapore: McGraw Hill Book Company.
29.
29. Goldsmith, W.1960. IMPACT: The Theory and Physical Behavior of Colliding Solids. London: Edward Arnold (Publishers) Ltd.
30.
30. Tan, T. M. and C. T. Sun. 1985. "Use of Static Indentation Laws in the Impact Analysis of Laminated Composite Plates,"Journal of Applied Mechanics, 52:6-12.
31.
31. Wu, H. T. and F. K. Chang. 1989. "Transient Dynamic Analysis of Laminated Composite Plates Subjected to Transverse Impact,"Computers and Structures, 31:453-466.
32.
32. Taylor, R. L., P. J. Beresford and E. L. Wilson. 1976. "A Non Conforming Element for Stress Analysis,"International Journal of Numerical Methods in Engineering, 10: 1211-1219.
33.
33. Cook, R. D.Concepts and Applications of Finite Element Analysis, Second edition, New York: John Wiley and Sons, Inc.
34.
34. Sankar, B. V. and C. T. Sun. 1985. "An Efficient Numerical Algorithm for Transverse Impact Problems,"Computers and Structures, 20: 1009-1012.
35.
35. Sun, C. T. and S. Chattopadhyay. 1975. "Dynamic Response of Anisotropic Laminated Plates under Initial Stress to Impact of a Mass,"Journal of Applied Mechanics, 42:693-698.
