Using fatigue parameter to predict crack initiation location by means of ۳D-finite element simulation on curved track
سال انتشار: 1402
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 118
فایل این مقاله در 11 صفحه با فرمت PDF قابل دریافت می باشد
- صدور گواهی نمایه سازی
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
ICRARE08_053
تاریخ نمایه سازی: 10 مرداد 1402
چکیده مقاله:
Dynamic modeling of wheel-rail interaction is significant in accurate fatigue analysis of railway. Both location and magnitude of wheel-rail stress must be evaluated accurately and efficiently via computational tools. In curved railway tracks, distribution of the force exerted on the wheel is complex as it is multiaxial rather than uniaxial; thus, a more comprehensive computational model is required. In this work, a numerical procedure is developed to investigate fatigue crack initiation on curved tracks by using Universal Mechanism software to specify the spectrum of axial wheel force as input to a three dimensional explicit finite element model to obtain the resulting stress at the wheel-rail contact region. A critical plane method based on low cyclic fatigue situation and multiaxial loading is used for determining the location of crack initiation and its orientation. The effect of radius on the exact location of fatigue crack initiation is established in this approach. The proposed model successfully predicts realistic wheel-rail dynamic response to cyclic loading, applying the geometry of the curved track
کلیدواژه ها:
Dynamic modeling ، wheel-rail interaction ، curved track ، explicit finite element model ، critical plane method ، low cyclic fatigue ، fatigue parameter
نویسندگان
Amin Nazari
School of Railway Engineering, Iran University of Science and Technology, Tehran ۱۶۸۴۶-۱۳۱۱۴, Iran
Parisa Hosseini Tehrani
Associate Professor, School of Railway Engineering, Iran University of Science and Technology, Tehran ۱۶۸۴۶-۱۳۱۱۴, Iran