Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : proposed nonlinear damage model

Applying Non-linear Damage Model for Predicating Corrosion Effect on Fatigue Life of (carbon + glass) Fibers / PMMA Composite

Husin .J.M. Al-Alkawi; Amer Hameed Majeed; Saisaban Ali Fahad

Engineering and Technology Journal, 2012, Volume 30, Issue 16, Pages 2898-2909

The objective of this work is to investigate the salt water effects on fatigue
degradation, and stress-life relationship. A series of reversed fatigue experiments were
conducted on (carbon+ glass) / PMMA of salt water environments. Results indicate that
the composite degrade during cycling. Exposure to salt water (salt water is used to
simulate the sea water) provides the most significant reduction in fatigue life. The
corrosion environment reduces the fatigue strength by 61% compared to dry fatigue.
Based on previous damage model [16], corrosion – fatigue nonlinear damage model is
presented in this paper, which contains one material constant; the inverse slope (α) of the
S-N curve. Six specimens of two levels loading of composite material were used to verify
the present model; the results showed that the predicted life is in good agreement with the
experimental results.