|Autors: Dimova, B. D., Tsonev, V. T.|
Title: An approach for predicting fatigue life of notched specimens of AZ91 magnesium alloy
Keywords: Fatigue, Fatigue life prediction, Hysteresis energy, Notches, Mg-Alloys
Abstract: An approach for predicting fatigue life of notched specimens made from magnesium alloys is described. The possibility for application of the effective stress concentration factor Kf in predicting durability has been examined, taking into account the concentration of stresses. The approach is based on cyclic plastic strain energy density and effective stress concentration factor and takes into account the dynamics of the fatigue process, including the number of cycles to failure and total hysteresis energy. The effective stress concentration factor Kf is determined analytically and experimentally for the investigated magnesium alloy from experimental tests under symmetrical loading. An experimental verification has been performed on smooth and notched specimens for magnesium alloy AZ91 subjected to cyclic tension/compression. A predictive capability of the approach is found to be with good agreement to the experimental results for the investigated type of Mg-alloy.
Вид: публикация в международен форум