An Energy Model for Fatigue Life Prediction of Composite Materials Using Continuum Damage Mechanics

Abstract:

In this paper an energy-based model for predicting fatigue life and evaluation of progressive damage using plane-stress assumption is proposed. This model allows us to predict fatigue durability taking into account principal directions of the stress tensor relative to planes of elastic symmetry of material. First, the unknown parameters of this model will be calculated for three different composites with various lays-up. Method for determining these parameters is based on the minimum necessary set of experimental data. Afterwards the model was used to predict fatigue life and estimate accumulated fatigue damage in a unidirectional composite under different angles of loading. The analysis of conclusions of the theory for various loading conditions was carried out and performed comparison between the experimental data and predicted results. The predicted fatigue lives obtained by the proposed energy model were in good agreement with the experimental data.

• Periodical: Applied Mechanics and Materials (Volumes 110-116)
• Pages: 1353-1360
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.110-116.1353
• Online since: October 2011
• Authors: A. Movaghghar, G. I. Lvov
• Keywords: Composite Material, Failure Mechanism, Fatigue, Fracture, Residual Stiffness, Residual Strength

References

[1] W. Van Paepegem, J. Degrieck, Fatigue Damage Modelling of Fiber-reinforced Composite Materials: Review, Applied Mechanics Reviews, 54(4), pp.279-300, (2000).

DOI: 10.1115/1.1381395

[2] B. Harris, Fatigue in Composites, CRC Press, Boca Raton, pp.10-68, (2003).

[3] P. I. Kattan, G. Z. Voyiadjis, Damage Mechanics With Finite Elements, Elsevier, Second Edition (2006).

[4] J. Lemaitre, R. Desmorat Engineering Damage Mechanics: Ductile, Creep, Fatigue and Brittle Failures, Springer, Berlin, (2005).

DOI: 10.1002/zamm.200590044

[5] J. Lemaitre, ed., Handbook of Materials Behavior Models. San Diego: Academic Press, (2001).

[6] P. I. Kattan, G. Z. Voyiadjis, Advances in damage mechanics: Metal and metal matrix composites with and introduction to fabric tensors, Springer (2001).

DOI: 10.1016/b978-0-08-043601-2.50005-2

[7] Hayder Al-Shukri, Muhannad Khelifa, Fatigue study of E-glass fiber reinforced polyester composite under fully reversed loading and spectrum loading, Eng. & Technology, Vol. 26, No. 10, (2008).