Abstract
Fatigue strength and stress-strain response of plain woven glass fabric laminates subjected to combined loadings with pulasating tension and alternate torsion were investigated in this study. To distinguish the difference of fatigue failure behavior between that under pulsating torsion loading and that under alternate torsion loading, the alternate torsion test was also conducted. Fatigue strength and stress-strain response under alternate torsion loading were compared with that under pulsating torsion loading. From the experiment, it is found that the normalized fatigue strength (which is cyclic biaxial stress divided by the static strength) under pulsating tension/alternate torsion combined loading is dependent on the biaxial stress ratio. The fatigue strength under alternate torsion loading is much lower than that under pulsating torsion loading. The stress-strain response also shows nonlinear behavior more strongly than that under pulsating torsion loading.
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