中国机械工程2024，Vol.35Issue(9)：1542-1547,6.DOI:10.3969/j.issn.1004-132X.2024.09.003
多周期动态循环应力下的J-A-N力磁耦合机理模型
J-A-N Force Magnetic Coupling Mechanism Model under Multi Cycle Dynamic Cyclic Stresses
摘要
Abstract
At present,force magnetic coupling J-A model did not consider the influences of do-main wall thickness and multi cycle dynamic cyclic stresses in pinning fields,which resulted in an overestimation of stress magnetization values in the J-A model that could not accurately describe early fatigue damages.Therefore,based on domain wall theory and Burgers dislocation theory,the domain wall thickness factor was introduced to improve the pinning field equation of the J-A model.Further-more,factors such as stress amplitude and cycle number of cyclic loads were considered,and a J-A-N force magnetic coupling mechanism model under multi cycle dynamic cyclic stress was established.Magnetization laws were obtained under different dynamic cyclic stress amplitudes σa and mean stressσm.With the same cycle times,the σa mainly affects the stress magnetization rate,while the static mean stress σm mainly affects the stress saturation magnetization size.When the same σm is constant,with the increase of σa,the speed of reaching stress saturation state increases.When the same σa is constant,the stress saturation magnetization decreases with the increase of σm.To verify the effective-ness of the J-A-N model,magnetic field signal detection experiments were conducted on 45 steel three-point bending specimens under multi cycle dynamic cyclic stress,and the experimental results are consistent with the model ones.关键词
J-A模型/力磁耦合/磁记忆检测/早期疲劳损伤Key words
Jiles-Atherton(J-A)model/magneto-mechanical effect/magnetic memory detection/early fatigue damage分类
矿业与冶金引用本文复制引用
邢海燕,刘伟男,陈龙,徐成,弋鸣,颜俊杰..多周期动态循环应力下的J-A-N力磁耦合机理模型[J].中国机械工程,2024,35(9):1542-1547,6.基金项目
国家自然科学基金(11272084) （11272084）
黑龙江省自然科学基金(LH2019A004) （LH2019A004）
