Fatigue study of e-glass fiber reinforced polyester composite under fully reversed loading and spectrum loading

Abstract EN

Study of the fatigue behaviors experimentally and theoretically of a composite material manufactured for this paper by stacking four layers of E-glass fiber in different angle orientations (0o, ± 45o, 0o / 90o) immersed in polyester resin with total thickness 4 mm.

They were tested under two types of dynamic loads in fully reversible tension-compression load at (R = -1) and spectrum load as fatigue testing, to estimate life curves and microscopic an examination was carried out for stress affected and fracture areas.

Finite Element Analysis (FEA) using ANSYS Workbench™ was used to evaluate the composite behaviour under fatigue conditions.

The results of the fatigue test show that the uniaxial [04] composite has the highest strength and the fatigue degradation is also the highest.

The high magnification optical microscopy method shows that the failure of lamina at ± 45oand 0o/ 90o is due to matrix failure in the direction of the fiber, whereas for the unidirectional lamina at 0o, the failure is due to fiber breakages.