This paper describes a test methodology used for characterizing different glass-resin composite systems with respect to their low-velocity impact response, dynamic modulus and inherent damping properties. Impact tests were conducted on SMC plaque samples in an instrumented impact test machine. A Dynamic Mechanical Analyzer was used for testing small rectangular samples in the fixed frequency mode of operation. An impulse-frequency response vibration technique was used for obtaining the dynamic modulus and loss factor of cantilever beam specimens at ambient conditions. The dynamic modulus, glass transition and damping peak intensities obtained from the DMA and the vibration techniques are correlated with the impact test data. The potential application for screening glass-resin formulations with respect to their impact performance is discussed.
1. Gill, P.S. and Hassel, R.L., Polypropylene Impact Resistance by Dynamic Mechanical Analysis, DuPont Application Brief TA-76.
2.
2. Kowsika, M. and Mantena, P.R., 1999, “Static and Low-Velocity Impact Characteristics of Pultruded Hydrid Glass-Graphite/Epoxy Composite Beams,”Journal of Thermoplastic Composite Materials, 12-3: 121-132.
3.
3. Kowsika, M. and Mantena, P.R. 1997, “Static and Low-Velocity Impact Characteristics of Pultruded Hydrid Glass-Graphite/Epoxy Composite Beams,”Proceedings of the American Society for Composites 12th Annual Technical Conference, Dearborn, MI, October 6-8.
4.
4. Kowsika, M., Mantena, P.R. and Balasubramaniam, K., 1997, “Energy Absorption and Dissipation Characteristics of Pultruded Glass-Graphite/Epoxy Hybrid Composite Beams,”Proceedings of the Symposium on Vibroacoustic Methods in Processing and Characterization of Advanced Materials and Structures, The 1997 International Mechanical Engineering Congress and Exposition, Dallas, TX, Nov. 16-20.
5.
5. Kowsika, M. and Mantena, P.R., 1996, “Optimal Pultrusion Process Conditions for Improving the Dynamic Properties of Graphite-Epoxy Composite Beams,”Materials Evaluation, 54-3: 386-392.
6.
6. Kowsika, M., Barpanda, D. and Mantena, P.R., 1996, “Impact and Damping Characteristics of Pultruded Hybrid Glass-Graphite/Epoxy Composites,”Proceedings of the Third International Conference on Composites Engineering (ICCE/3), New Orleans, July 21-26, 463-464.
7.
7. Bhatnagar, A., Rammoorthy, M., Glaser, R., Nori, C.V. and Mantena, P.R., 1997, “Ballistic and Damping Characteristics of ECPE/GLASS Hybrid Composites,”Proceedings of the Symposium on Vibroacoustic Methods in Processing and Characterization of Advanced Materials and Structures, The 1997 International Mechanical Engineering Congress and Exposition, Dallas, TX, Nov. 16-20.
8.
8. Hosur, M.V., Murthy, C.R.L. and Ramamurthy, T.S., 1996, “Low-Velocity Impact Response and Evaluation of Delamination Damage in CFRP Laminates,”Proceedings of the ASME, Noise Control and Acoustics Division, NCA 24: 203.
9.
9. Barpanda, D., Kowsika, M. and Mantena, P.R., 1996, “Effects of Moisture on the Dynamic and Impact Properties of Pultruded Glass-Epoxy Composite Beams,”Proceedings of the Symposium on Advanced Materials for Vibroacoustic Applications, The 1996 ASME International Mechanical Engineering Conference and Exposition, Atlanta, GA, Nov. 17-22, 107-123.
10.
10. Barpanda, D. and Mantena, P.R., 1996, “Dynamic Mechanical Analysis of Pultruded Glass-Graphite/Epoxy Hybrid Composites at Elevated Temperatures,”Journal of Reinforced Plastics and Composites, Vol. 15, Number 5, May, 497-532.
11.
11. Sichina, W.J. and Gill, P.S., 1987, “Viscoelastic Characterization of Composites by Dynamic Mechanical Analysis,”42nd Annual Conference of the Composites Institute, The Society of the Plastics Industry.
12.
12. Barpanda, D. and Mantena, P.R., 1998, “Effects of Hybridization on the Creep and Stress Relaxation Characteristics of Pultruded Composites,”Journal of Reinforced Plastics and Composites, 17-3: 234-249.
13.
13. Barpanda, D. and Mantena, P.R., 1994, “Effects of Time and Temperature on the Dynamic Mechanical Properties of Pultruded Glass-Epoxy Composites,”Journal of Materials Education, 16-5, 6: 407-431.
14.
14. Mantena, P.R., 1991, “NDE Applications of Damping Measurements,”Proceedings of NOISE-CON, 91:361.
15.
15. Mantena, P.R., Vangipuram, R. and Vaughan, J.G., 1994, “Dynamic Flexural Properties of Pultruded Glass/Graphite Hybrid Composites,”Proceedings of the 39th International SAMPE Symp., Anaheim, CA, April 11-14.
16.
16. Nori, C.V., Mantena, P.R. and McCarty, T.A., 1996, “Experimental and Finite Element Analysis of Pultruded Glass-Graphite/Epoxy Hybrids in the Axial and Flexural Modes of Vibration,”Journal of Composite Materials, 30-18: 1996-2018.
