CUMULATION OF DAMAGE IN LOW CYCLE FATIGUE AND GIGACYCLE FATIGUE
The paper contains an energy method to estimate cumulation of damage in low cycle fatigue and gigacycle fatigue respectively under uniaxial stress state.The low cycle fatigue damage (LCF) is coming from the plastic deformation which can he calculated by interpretation the hysteresis loop.On the contrary there is not any plastic deformation in gigacycle fatigue.An infrared thermographic technique is applied to monitor the middle part of the specimen surface temperature distribution.The energy dissipated in a unit volume of specimen has some relationship with the mechanics consummation energy.A model is created to calculate the energy according to the evolution of fatigue test in low cycle and gigacycle.The energy of a unit volume and per cycle is calculated out.The comparison of the energy is done in the low cycle and gigacycle regime and a parameter is proposed to estimate the fatigue of damage with respect to integrating energy of cycle in this paper.This method is applied to study the effect of previous low cycle fatigue strain hardening or the gigacycle fatigue damage.
Cumulation of damage Low cycle fatigue Gigacycle fatigue Energy
Z.Y.Huang D.Wagner C.Bathias
University Paris X,LEEE,Ville dAvray,France and University of Aeronautics and Astronautic,Nanjing,C University Paris X,LEEE,Ville dAvray,France
国际会议
第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)
安徽黄山
英文
1207
2008-06-03（万方平台首次上网日期，不代表论文的发表时间）