Energy Absorption and Strength Evaluation for Compressed Glass Fibre Reinforced Polyester (GRP) for Automobile Components Design in Crash Prevention Scheme


This paper utilized the compressive tests results to establish some critical mechanical properties and crashworthiness parameters that may be required to design GRP composites of polyester matrix in automobile structures. Third order polynomial function was used with numerical methods to establish the elastic properties whish could not be established due to sensitivity of the Monsanto tensometer used to obtain the compression results. This study showed that the finite difference method captured the general trend of experimental solution giving optimum value of compressive stress as 23.78MPa at strain of 0.018 and elastic limit of 12.01MPa at 0.01 strain through finite difference analysis while the solution with third order polynomial interpolation gave optimum compressive stress as 36.57MPa at 0.018 strain and elastic limit of 12.143MPa. Also established with compression data is the compressive or buckling moduli of 1.2GPa. Gauss-Legendre two point rule was used to evaluate the area under the stress-strain curve which measured the amount of energy absorbed per unit volume of sample from where the energy absorbed at ultimate strength of 0.025J/M3- 0.22 J/M3 , energy at fracture of 0.62 J/M3- 1.62 J/M3 and the absorbed specific work 0.001J/Kg are established.

Share and Cite:

C. Ihueze and A. Enetanya, "Energy Absorption and Strength Evaluation for Compressed Glass Fibre Reinforced Polyester (GRP) for Automobile Components Design in Crash Prevention Scheme," Journal of Minerals and Materials Characterization and Engineering, Vol. 11 No. 1, 2012, pp. 85-105. doi: 10.4236/jmmce.2012.111007.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] www.woodheadpublishing
[2] G.C. Jacob, J.F.Fellers,S.Simunovk and J.M.Sarbuck (2002). Energy Absorption in Polymer Composites for Automotive Crashworthiness, Journal of Composite Materials, April 2002, vol.36 (7), 813-850
[3] Budiansky, B. and Fleck, N.A., (19 94), Compressive kinking of fibre composites, Journal of Applied Mechanics, ASME, Vol. 47, No. 6 S 246 – 249.
[4] Srinivasan Sridharan, (1994). Imperfection sensitivity of stiffened cylindrical shells under interactive buckling, ASME Journal of Applied Mechanics, Vo;. 47, No. 6, A 251 255
[5] Chung, I. and Weitsmam, .J.(1994), Model for Micro-Buckling/Micro-Kinking Compressive Response of Fibre Reinforced Composites ASME Journal of Applied Mechanics, Vol. 47, No. 6, S 256 – S 261
[6] Kyriakides, S., Perry, E.J., and Liechti, K.M. (1994): Instability and failure of fibre composites in compressive, ASME Journal of Applied Mechanics, Vol. 47, No. 6, S 262- 266
[7] HSU, S.Y., Vogler, T.J. and Kyriakides, S., (1998) Compressive Strength Predication for Fibre Composites, ASME Journal of Applied Mechanics, Vol. 65, Page 7-15.
[8] Crawford, R.J., (1998), Plastics Engineering,3rd ed, Butterworth-Heinemann Publisher,Oxford
[9] Foye, J.F., (1968) Technical Report AFML – TR – 68 – 91, North America Rockwell Corporation, Columbus, OH., USA.
[10] Ihueze, C.C. (2005). Optimum Buckling Response Model of GRP Composites, Ph.D. Thesis. Mechanical Engineering Department, University of Nigeria
[11] Hakim S. Sultan Aljibori (2010). Energy Absorption Characteristics and Crashing Parameters of Filament Glass Fiber /Epoxy Composite Tubes, European Journal of Scientific Research Vol.39 No.1 (2010), pp.111-121, EuroJournals Publishing, Inc. 2010
[12] E.S. Shigley and C. R. Mishchke, Mechanical Designers Work Book: Corrosion and Wear, McGraw-Hill Publishing, (1989).
[13] Steven C. Chapra and Raymond, P.C. (1998) Numerical Methods for Engineerings, 3ed, WCB/Mc Graw-Hill, Boston
[14] Zill, D. G., and Cullen, M. R., (1989). Advanced Engineering Mathematics, Jones and Bartlett Publishers, Sudbury, Massachusetts
[15] Tao Yin, Min Zhi Rong, Jingshen Wu, Haibin Chen and Ming Qiu Zhang. Healing of impact damage in woven glass fabric reinforced epoxy composites, J Applied Science and Manufacturing 2008; 39: 1479-1487
[16] Koshal, D., (1998). Manufacturing Engineers Reference book, Butterworth-Heinemann Publisher.

Copyright © 2023 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.