Materiales de Construcción, Vol 56, No 282 (2006)

Influence of the average stress in a unidirectional glass-epoxi composite material subjected to off-axis cyclic loads


https://doi.org/10.3989/mc.2006.v56.i282.30

D. Revuelta
Instituto de Ciencias de la Construcción Eduardo Torroja - CSIC, Madrid, Spain

Abstract


A fatigue theoretical model for continuous glass-fibrereinforced epoxy composite material under general loadconditions was developed in previous works based onthe principal fatigue failure modes and on local failurecriteria. It was demonstrated that fatigue life dependedon the cyclic shear stress and the maximum stress transverseto the crack growth direction. Following the previousmodel, this work analyzes the influence of the averageapplied stress on the fatigue life of the material.

Keywords


composite; fibre reinforcement; glass; polimer; fatigue

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References


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(2) Hahn, H. T., Kim, R. Y.: “Fatigue bahavior of a composite laminate”, Journal of Composite Materials, vol. 10 (1976).

(3) Revuelta, D.: “Predicción de la vida a fatiga en un material compuesto vidrio-epoxi unidireccional sometido a cargas cíclicas desviadas respecto de la dirección de la fibra”, Mater. Contrucc., vol. 55, nº 277 (2005), pp. 51-59.

(4) Fawaz, Z., Hellyin, F.: “Fatigue failure model for fiber reinforced materials under general loading condition”, Journal of Composite Materials, vol. 28, nº 4 (1994), pp. 1432-1451.




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