مشروع البحث: Surface Roughness Evolution in Hardened Steel Disks: An Integrated Profilometry and ANSYS-FEA Approach to Assess Contact Conditions and Residual Stress Profiles
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المساهمين
الممولين
رقم التعريف
194
الباحث
سالم فتحي الشلتات
الوصف
This thesis investigates the impact of the running-in process on the surface roughness of hardened and ground steel disks, which simulate gear tooth contact conditions. The focus is on the changes in asperity shape due to plastic deformation and the associated residual stresses at the asperity scale. In-situ profilometry quantifies these shape changes, particularly in areas with high plastic deformation and tensile residual stress, which could lead to surface micropitting during further use.
A novel method for repositioning and aligning measured surface profiles from mixed lubrication experiments is presented. Finite element analysis (FEA) using ANSYS software is central to this study, encompassing both elastic and plastic contact analyses. The analysis starts with standard smooth elastic body contacts, validated against Hertzian elastic solutions, and extends to include plastic behaviour, aligning with established models. Various numerical case studies improved the predictive accuracy of FEA, with increased mesh resolutions enhancing result precision and scaled-down loading conditions managing convergence issues effectively.
الكلمات الدالة
Surface Roughness Evolution in Hardened Steel Disks: An Integrated Profilometry and ANSYS-FEA Approach to Assess Contact Conditions and Residual Stress Profiles