Model of Fatigue Damage in Strain Rate-Sensitive Composite Materials.
Model of Fatigue Damage in Strain Rate-Sensitive
Lee, S.; Nguyen, T.; Chuang, T.
Journal of Materials Research, Vol. 18, No. 1, 77-80,
fatigue; damage; composite materials; polymer composite
A fatigue damage accumulation model based on the Paris
law is proposed for strain-rate-sensitive polymer
composite materials. A pre-exponent factor c2/f and
strain-rate sensitive exponent n are introduced.
Numerical analysis of the model was performed using
experimental data obtained in the literature. Both
factors were found to enhance fatigue damage
accumulation. The analysis also revealed that the extent
of damage increases with decreasing frequency and that
the damage rate is more sensitive to the applied maximum
stress than to the stiffness of the material.