Life prediction of reinforced Glass-Epoxy and Graphite-Epoxy polymers subjected to various loading conditions

Authors

1 University of Zanjan

2 University of zanjan,

Abstract

Investigation of the fatigue behavior of the reinforced polymer composites is necessary in order to design reliable and durable structure. Due to the difference between the fatigue properties of the reinforced polymers and the traditional isotropic engineering materials, introducing criteria for prediction of the fatigue life of the reinforced polymers will be very useful in design and analysis. This paper is aimed to life prediction of reinforced plates which is subjected to bending fatigue loads. The Glass-Epoxy and Graphite-Epoxy plates which are subjected to the distributed and concentrated bending loads are studied based on the strength degradation model. The distribution of the stresses at the plies of the plate subjected to transverse load is obtained using the first shear deformation plate theory. Then the strength degradation model is used to predict the strength reduction of each plies of the plate in each loading cycle. The degradation of plies and reduction of the strength in each loading stage are accumulated and the residual strength of plies is obtained as function of the load cycles. This procedure is repeated until the plies fail and the final catastrophic failure occurs in the plate.

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References

[1] Jen MHR, Lee Ch (1998) Strength and life in thermoplastic composite laminates under static and fatigue loads. Part I: Experimental, Int J fatigue 20(9): 605-615.
[2] Jen M. H. R, and Lee Ch (1998)  Strength and life in thermoplastic composite laminates under static and fatigue loads. Part II: Formulation. Int J fatigue 20(9): 617-629.
[3] Carrera E, Ciuffreda A (2005) Bending of composites and sandwich plates subjected to localized lateral loading: a comparison of various theories. Compos Struct 68(2): 185-202.
[4] Parhi PK, Bhattacharyya SK, Sinha PK (2001) Failure analysis of multiple delaminated composite plates due to bending and impact. Bull Mater Indian Academy scie 24: 143-149.
[5] Broutman LJ, Sahu S (1972) A new theory to predict cumulative fatigue damage in fiberglass reinforced plastics. in Composite Materials: Testing and Design (2nd Conference), ASTM STP 497, American Society for Testing and Materials 170-188.
[6] Shokrieh MM, Lessard LB (2003) Multiaxial fatigue behaviour of Unidirectional plies based on uniaxial fatigue experiments – I. Modelling. Int J Fatigue 19: 201–207.
[7] Shokrieh MM, Taheri B (2010) Fatigue life Predication of composite Materials Based on Progressive damage modeling. University of Science and Technology Iran, Woodhead Publishing 261-301 and 401-450.
[8] Shokrieh MM, Lessard L B (2000) Progressive fatigue damage modeling of composite materials. Part I: Modeling J Compos Mater 34(13): 1056-1080.
[9] Shokrieh MM, Lessard LB (2000) Progressive fatigue damage modeling of composite materials, Part II: Material characterization and model verification. JCompos Mater 34(13): 1081-1116.
[10] Shokrieh MM, Taheri BF (2008) Fatigue life evaluation of unidirectional composites by using residual strain energy. Iran J Polymer Sci Technol Chem (21): 19-26. (in Persian)
[11] Vassilopoulos AP, Keller T (2011) Fatigue of Fiber-reinforced Composites. Springer, New York.
[12] Jones RM (1998) Mechanics of composite materials. 2nd edn. Proffessor of Enginieering Science and Mechanics Virginia Poly technic institute and state university Blacksburg, virginia 24061-0219, 55-118 and 295-348.
[13] Shakeri M, Aghdam MM (2008) Mechanical Structure, Beam, plate and shell. Tehran, Amirkabir University of Technology, 149-158. (in Persian)
[14] KAW AK (2006) Mechanics of Composite Materials. 2nd edn. Taylor & Francis Group.
[15] Abrate S (2005) Impact on composite structures. Published in the United States of America by Cambridge University Press, New York.
[16] Shokrieh MM (1996) Progressive fatigue damage modeling of composite materials. A thesis submitted to the Faculty of Graduate Studies and Research in partial fulfillment of the requirements for the degree of Doctor of Philosophy, Department of Mechanical Engineering McGill University Montréal, Canada.
[17] Harris B (1986) Fatigue in composite. WoodHead, New York.
Journal of Solid and Fluid Mechanics
Volume 6, Issue 1
March and April 2016
Pages 153-165

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