Hakan Burak KARADAĞ, Ömer Sinan ŞAHİN, Aydın GÜNEŞ

Effect of Impactor Mass on Dynamic Response and Retention Properties of Composite Plates under Successive Impacts

This study mainly focuses on the effect of mass of impactor upon dynamic response of laminated composites. For this purpose two different impactors with different masses were used. The impact velocities were selected so that impactors with different masses had the same kinetic energy. The experiments were performed on simply supported woven E-glass reinforced epoxy laminates which are made of 8 layers stacked symmetrically. The variation of impact force, impactor velocity and laminate displacement versus interaction time were obtained. The impulse and energy absorption characteristics and damage zones were also investigated. After low velocity impact, the test specimens were subjected to three-point bending testing in order to get retention mechanical properties.

PDF

___

[1] Abrate, S. Impact on laminated composite materials. Appl Mech Rev., 1991; 4, 155-90.
[2] Caprino, G. Residual strength prediction of impacted CFRP laminates. Compos Mater.; 1984: 18, 508-18.
[3] Davies, G.A.O., Hitchings, D., Zhou, G. Impact damage and residual strengths of woven fabric glass/polyester laminates. Compos Part A: Appl Sci Manuf., 1996: 27A, 1147-56.
[4] Cantwell, W.J., Morton, J. Comparison of the low and high velocity impact response of CFRP. Composites, 1989: 20, 545-51.
[5] Ramkumar, R.L., Chen, P.C. Low velocity impact response of laminated plates. AIAA Journal, 1982; 21, 1448-1452.
[6] Abatan, A., Hu, H., Olowokere, D. Impact resistance modeling of hybrid laminated composites. J Thermoplastic Comp Mater., 1998; 11, 249-260.
[7] Goo, N.S., Kim, S.J. Dynamic contact analysis of laminated composite plates under low velocity impact. AIAA Journal., 1997; 35, 1518-1521.
[8] Liu, D., Raju, B.B., Dang, X. Size effects on impact response of composite laminates. Int J Impact Eng., 1998; 21, 837-854.
[9] Zhou, G. Damage resistance and tolerance in thick laminated composite plates subjected to lowvelocity impact. Key Eng Mater., 1998: 305, 141-143.
[10] Cantwell, W., Curtis, P., Morton, J. Post-impact fatigue performance of carbon fibre laminates with non-woven and mixed-woven layers. Composites, 1983; 14, 301-305.
[11] Mahfuz, H., Saha, M., Biggs, R., Jeelani, S. Damage tolerance of resin infiltrated composites under low velocity impact--experimental and numerical studies. Key Eng Mater. 1998; 141, 209-234.
[12] Foreign object impact damage to composites. ASTM STP 568.Philadelphia: ASTM; 1975, p. 159.
[13] Williams, J.G., Rhodes, M.D. Composite materials; testing and design. Proceedings of Sixth conference. ASTM STP 787, Philadelphia: ASTM; 1982, p. 450-480.
[14] Takeda, N., Sierakowski, R.L., Ross, C.A., Malvern, L.E. Delamination crack propagation studies of ballistically impacted glass/epoxy composite laminates. Exp Mech., 1982; 22, 19-25.
[15] Christoforou, A.P., Yigit, A.S. Effect of flexibility on low impact in composite plates. J Sound Vib, 1998; 217, 563-578.
[16] Cantwell, W.J., Morton, J. The impact resistance of composite materials--a review. Composites, 1991; 22, 347-62.
[17] Liu, S., Chang, F.K. Matrix cracking effect on delamination growth in composite laminates in- CBÜ Fen Bil. Dergi., Cilt 12, Sayı 1, 27-37 s CBU J. of Sci., Volume 12, Issue 1, p 27-37 37 duced by a spherical indenter. J Comp Mater, 1994; 28, 940-971.
[18] Salpekar, S.A. Analysis of delamination in crossply laminates initiating from impact-induced matrix cracking. J Compos Technol Res, 1993; 15, 88-94.
[19] Meyers, M.A. Dynamic behavior of materials. New York: John Wiley and Sons; 1994. Chapter 2, P. 23-65.
[20] Belingardi, G., Cavatorta, M.P., Paolino, D.S. Repeated impact response of hand layup and vacuum infusion thick glass reinforced laminates. Int J Impact Eng., 2008; 15, 609-619.
[21] Belingardi, G., Cavatorta, M.P., Paolino, D.S. On the rate of growth and extent of the steady damage accumulation phase in repeated impact tests. Compos Sci Tech.,, 2009; 69, 1693-1698.
[22] Baucom, J.N., Zikry, M.A. Low-velocity impact damage progression in woven E-glass composite systems. Composites Part A, 2005; 36, 658-664.
[23] Baucom, J.N., Zikry, M.A., Rajendran, A.M. Low-velocity impact damage accumulation in woven S2-glass composite systems. Compos Sci Techn., 2006; 66, 1229-1238.
[24] Morais, W.A., Monteiro, S.N. D'Almeida, J.R.M. Effect of the laminate thickness on the composite strength to repeated low energy impacts. Compos Struct., 2005; 70, 223-228.
[25] Hosur, M.V., Karim, M.R. Jeelani, S. Experimental investigations on the response of stitched/unstitched woven S2-glass/SC15 epoxy composites under single and repeated low velocity impact loading. Compos Struct., 2003; 61, 89-102.
[26] Mouritz, A.P., Gallaghef, J., Goodwin, A.A. Flexural Strength and Interlaminar Shear Strength of Stitched GRP Laminates Following Repeated Impacts. Comp Sci Techn., 1997; 57, 509-522.
[27] Uyaner, M., Kara, M. Dynamic response of laminated composites subjected to low-velocity impact. J Comp. Mat., 2007; 41, 2877-2896