Effect of Stress Ratio on Stress Intensity Factor of Type I Crack in A7N01 Aluminum Alloy
Taking the mode I crack of finite width plate as the research object, the nodal displacement extrapolation method of type I stress intensity factor is discussed, and the stress intensity factor expressed by nodal displacement is obtained. Taking A7N01 aluminum alloy as the research object, the finite element software ABAQUS was used to numerical simulation and analysis. The effect of stress ratio on stress intensity factor K I was discussed. The results showed that in the same crack size ratio a/W, the stress intensity factor increases with the increase of the stress ratio; at the same stress ratio R, the stress intensity factor increases with increasing crack size ratio. At the same time, change law of the stress intensity factor increase: under the condition of different stress ratio, when a/W≤0.6, the increase of stress intensity factor is almost consistent; when a/W>0.6, the increase of stress intensity factor will increase obviously.
Luis Rodríguez-Tembleque, Jaime Domínguez and Ferri M.H. Aliabadi
Y. T. Li et al., "Effect of Stress Ratio on Stress Intensity Factor of Type I Crack in A7N01 Aluminum Alloy", Key Engineering Materials, Vol. 774, pp. 259-264, 2018