Artículos de revistas
Residual modulus degradation model for woven fabric composite determined by impulse excitation technique
Fecha
2020-04-01Registro en:
International Journal of Fatigue, v. 133.
0142-1123
10.1016/j.ijfatigue.2019.105456
2-s2.0-85077117957
Autor
Universidade Estadual Paulista (Unesp)
Institución
Resumen
Structural components in the aircraft industries often require geometries that induce stress concentration effects, intensifying fatigue phenomena. When combined with a lack of structural monitoring it may limit composite applications. This research focuses on stiffness reduction of a notched carbon fiber laminate subjected to tension-tension fatigue load. The stiffness reduction was monitored during the cyclic tests by the use of the impulse excitation technique. Three major degradation stages were observed, the initial stage showed a high degradation rate followed by constant modulus degradation. The last stage was related to the presence of extensive delamination occurring outside of the notch area.