滑块式万向接轴扁头套筒有限元分析及断裂原因探究

摘要

With the help of finite element analysis software COSMOSWorks,the forces acting on the flat head sleeve( FHS )of slipper-type universal spindles( STUS )is analyzed it in a steel foctory.Then invalidation reasons of the FHS are incestigated in terms of its frature samples from macroscopic and microscopic aspects,which results show that the position where maximal stress occurs is located at the bottom filleted cotner of the FHS under an ideal condition.A defect generated by accidental damages at any other part of FHS may cause the initiotion of fatigue crak, which may further grow during steel rolling.Especially when the STUS generates torsion vibrations ,the fatigue crack may grow rapidly which may lead to the fracture invalidation of FHS fmally.%利用有限元软件COSMOSWorks对某钢铁厂的滑块式万向接轴扁头套筒的受力状况进行了分析,并从微观和宏观两方面对扁头套筒的断裂实样进行了失效原因的探究.认为在理想的状态下,扁头套筒发生应力最大位置位于其根部圆角处.当扁头套筒的某些部位发生意外损伤时产生的缺陷,将会导致疲劳裂纹源的发生.该处裂纹源会逐步形成疲劳裂纹并在轧钢过程中不断发展,尤其是当万向接轴发生扭转振动时,疲劳裂纹将会迅速扩展并最终导致扁头套筒断裂失效.